All servers · Agent payments (x402) · Utilities · Crypto & blockchain

AgentsToolsHub

io.github.Thyphex/agenttools-hub · v0.11.0

Measured by MCP Station

Description written by the publisher, not verified

156 paid-per-call JSON APIs for AI agents over x402: calculators, live data, crypto, security, dev.

Connect

claude mcp add --transport http agenttools-hub https://agentstoolshub.com/api/mcp

{
  "mcpServers": {
    "agenttools-hub": {
      "url": "https://agentstoolshub.com/api/mcp"
    }
  }
}

Tools as reported by the server

• calculators_percentage_calculator
  Calculate X% of Y, what percent X is of Y, and the percent change between two values — with step-by-step working shown. Use this when an agent needs to percent of a number, ratios and percent change. x402 price $0.01/call (USDC, eip155:8453).
• dev_base64_encode
  Encode text to base64 or decode base64 back to text. Full UTF-8 support including emoji and non-Latin scripts. Use this when an agent needs to uTF-8 safe base64 in both directions. x402 price $0.01/call (USDC, eip155:8453).
• databases_countries
  Reference database of all 250 countries and territories: ISO 3166-1 codes, capitals, regions, population, area, currencies, languages, TLDs and calling codes. Look up a single country or list by region. Use this when an agent needs to 250 countries: codes, capitals, currencies, populations. x402 pri
• calculators_discount_calculator
  Calculate the final sale price and the amount saved for any price and percent-off discount, with the working shown. Use this when an agent needs to sale price and savings from a percent off. x402 price $0.01/call (USDC, eip155:8453).
• calculators_tip_calculator
  Calculate the tip for any bill, the grand total, and how much each person pays when splitting. Defaults to a 15% tip. Use this when an agent needs to tip amount, total and per-person split. x402 price $0.01/call (USDC, eip155:8453).
• calculators_vat_calculator
  Add VAT to a net amount or remove VAT from a gross amount. Standard VAT rates for 36 countries are built in, or override with any custom rate. Use this when an agent needs to add or remove VAT at standard rates for 36 countries. x402 price $0.01/call (USDC, eip155:8453).
• calculators_bmi_calculator
  Calculate Body Mass Index from weight (kg) and height (cm), with the WHO weight category and the healthy BMI weight range for your height. Use this when an agent needs to body Mass Index with WHO category. x402 price $0.01/call (USDC, eip155:8453).
• calculators_date_difference_calculator
  Count the total days between two dates, plus the breakdown in weeks and days and in calendar years, months and days. Use this when an agent needs to days, weeks and calendar time between two dates. x402 price $0.01/call (USDC, eip155:8453).
• calculators_age_calculator
  Calculate a person's exact age in calendar years, months and days from their date of birth, plus total days lived. Reference date defaults to today (UTC). Use this when an agent needs to exact age in years, months and days. x402 price $0.01/call (USDC, eip155:8453).
• calculators_loan_payment_calculator
  Calculate the fixed monthly payment for a loan from its principal, annual interest rate and term in years, plus total repaid and total interest (annuity formula). Use this when an agent needs to monthly payment, total cost and interest for any loan. x402 price $0.01/call (USDC, eip155:8453).
• calculators_compound_interest_calculator
  Project the future value of a deposit with compound interest: choose annual, semi-annual, quarterly, monthly, weekly or daily compounding and see total interest earned. Use this when an agent needs to future value with any compounding frequency. x402 price $0.01/call (USDC, eip155:8453).
• calculators_fuel_cost_calculator
  Calculate the liters of fuel a trip needs and its total cost from distance, consumption (L/100 km) and price per liter — with optional cost splitting between passengers. Use this when an agent needs to trip fuel and cost, splitable between people. x402 price $0.01/call (USDC, eip155:8453).
• calculators_reading_time_calculator
  Estimate reading time from a word count at any reading speed. Defaults to 200 words per minute — the typical silent-reading speed for adults. Use this when an agent needs to how long a text takes to read, by word count. x402 price $0.01/call (USDC, eip155:8453).
• converters_length_converter
  Convert between metric and imperial length units: kilometers, meters, centimeters, millimeters, micrometers, nanometers, miles, yards, feet, inches and nautical miles. Use this when an agent needs to metric and imperial distance units, instantly. x402 price $0.01/call (USDC, eip155:8453).
• converters_weight_converter
  Convert between weight and mass units: metric tons, kilograms, grams, milligrams, pounds, ounces and stones with exact international definitions. Use this when an agent needs to kilograms, pounds, ounces and more. x402 price $0.01/call (USDC, eip155:8453).
• converters_temperature_converter
  Convert between Celsius, Fahrenheit and Kelvin with exact formulas, reference points (freezing and boiling water) and step-by-step working. Use this when an agent needs to celsius, Fahrenheit and Kelvin, both ways. x402 price $0.01/call (USDC, eip155:8453).
• converters_data_size_converter
  Convert digital storage units: bits, bytes, KB, MB, GB, TB (decimal, ×1000) and KiB, MiB, GiB, TiB (binary, ×1024) — both systems side by side. Use this when an agent needs to decimal (KB/MB/GB) and binary (KiB/MiB/GiB) units. x402 price $0.01/call (USDC, eip155:8453).
• converters_speed_converter
  Convert speed units: kilometers per hour, miles per hour, meters per second, knots and feet per second with exact definitions. Use this when an agent needs to km/h, mph, m/s, knots and ft/s. x402 price $0.01/call (USDC, eip155:8453).
• converters_area_converter
  Convert area units: square millimeters, centimeters, meters and kilometers, hectares, acres, square feet and square miles. Use this when an agent needs to square meters, feet, acres, hectares. x402 price $0.01/call (USDC, eip155:8453).
• converters_volume_converter
  Convert cooking and liquid volume units: milliliters, liters, cubic meters, US gallons, quarts, pints, cups, fluid ounces, tablespoons and teaspoons. Use this when an agent needs to liters, gallons, cups, milliliters. x402 price $0.01/call (USDC, eip155:8453).
• converters_unix_timestamp_converter
  Convert Unix epoch timestamps to ISO/UTC dates and back. Millisecond timestamps are detected automatically; invalid dates are rejected with clear errors. Use this when an agent needs to epoch seconds ↔ human dates, both directions. x402 price $0.01/call (USDC, eip155:8453).
• dev_number_base_converter
  Convert integers between any bases from 2 to 36 — binary, octal, decimal, hexadecimal and beyond — with BigInt precision (no limit on magnitude). Use this when an agent needs to binary, octal, decimal, hex — any base 2–36. x402 price $0.01/call (USDC, eip155:8453).
• converters_roman_numeral_converter
  Convert numbers to Roman numerals (1–3999) and Roman numerals back to numbers, with strict validation that rejects non-standard forms like IIIM or VX. Use this when an agent needs to numbers ↔ Roman numerals, with validation. x402 price $0.01/call (USDC, eip155:8453).
• dev_case_converter
  Convert text between nine letter cases: UPPER, lower, Title, Sentence, camelCase, PascalCase, snake_case, kebab-case and CONSTANT_CASE. camelCase boundaries are split automatically. Use this when an agent needs to camelCase, snake_case, kebab-case and more. x402 price $0.01/call (USDC, eip155:8453).
• dev_jwt_decoder
  Decode a JSON Web Token's header and payload to readable JSON. Pure decoding: signatures are NOT verified and no secret is needed. Accepts standard and URL-safe base64 with or without padding; claims like exp and iat are rendered as dates. Use this when an agent needs to decode header and payload —
• dev_url_encoder
  Percent-encode text for safe inclusion in URLs and query strings, or decode percent-encoded text back. Uses the standard encodeURIComponent rules. Use this when an agent needs to percent-encoding for query strings and URLs. x402 price $0.01/call (USDC, eip155:8453).
• dev_json_formatter
  Validate JSON with precise error messages, pretty-print it with any indent, and inspect its top-level type and element counts. Use this when an agent needs to validate, pretty-print and inspect JSON. x402 price $0.01/call (USDC, eip155:8453).
• dev_http_status_codes
  Reference database of HTTP response status codes with phrase, category and explanation. Look up a specific code or list a whole category (1xx–5xx). Use this when an agent needs to look up any HTTP status code's meaning. x402 price $0.01/call (USDC, eip155:8453).
• dev_mime_types
  Look up MIME content types by type substring or file extension, or list a category — covering text, application, image, audio, video, font and multipart types used in web APIs. Use this when an agent needs to content-Type lookup by type or file extension. x402 price $0.01/call (USDC, eip155:8453).
• crypto_wei_eth_converter
  Convert between wei, kwei, mwei, gwei, microether, milliether and ether with exact BigInt arithmetic. Decimal strings of any magnitude convert without floating-point error. Use this when an agent needs to exact Ethereum unit conversion — no float errors. x402 price $0.01/call (USDC, eip155:8453).
• crypto_gas_fee_calculator
  Calculate a transaction's gas fee: gas units × gas price (gwei) gives the ETH cost, multiplied by the ETH price for USD. Exact BigInt math for the wei amounts. Use this when an agent needs to transaction cost in ETH and USD from gas × gwei. x402 price $0.01/call (USDC, eip155:8453).
• finance_roi_calculator
  Calculate return on investment: profit (or loss) and the percentage return relative to the initial amount invested. Use this when an agent needs to return on investment as a percentage. x402 price $0.01/call (USDC, eip155:8453).
• finance_cagr_calculator
  Calculate the compound annual growth rate that takes an initial value to a final value over a given number of years — the standard way to annualize returns. Use this when an agent needs to compound annual growth rate, time-normalized. x402 price $0.01/call (USDC, eip155:8453).
• finance_margin_calculator
  Calculate gross profit, profit margin (profit as % of price) and markup (profit as % of cost) from a unit cost and selling price — the two numbers people constantly mix up. Use this when an agent needs to profit margin vs markup, both computed. x402 price $0.01/call (USDC, eip155:8453).
• finance_iban_validator
  Validate an International Bank Account Number: country code, country-specific length and the ISO 7064 MOD 97-10 check digits — with the pretty-printed grouping returned when valid. Use this when an agent needs to structure, length and mod-97 checksum validation. x402 price $0.01/call (USDC, eip155:8
• live_now
  Returns the current date and time in any IANA time zone, plus Unix seconds/milliseconds, ISO 8601, weekday and day-of-year. Use it whenever an agent needs to know 'now'. Use this when an agent needs to the current date/time in any time zone — agents have no clock. x402 price $0.01/call (USDC, eip155
• live_business_days
  Count business days (Mon–Fri) between two dates, with weekend and holiday breakdown. Provide a country code and real public holidays (via Nager.Date) are excluded too. Use this when an agent needs to working days between dates, optionally minus public holidays. x402 price $0.01/call (USDC, eip155:84
• live_exchange_rates
  Live foreign-exchange reference rates from the European Central Bank (via frankfurter.dev): a full rate table against any base currency, or cross-rate conversion of any amount. Refreshed every business day by the ECB, cached one hour. Use this when an agent needs to live ECB reference rates for 30 c
• live_weather
  Live weather from Open-Meteo: current temperature, humidity, wind and conditions plus a 3-day forecast, by city name or coordinates. No API key, cached 30 minutes. Use this when an agent needs to current conditions + 3-day forecast for any city. x402 price $0.02/call (USDC, eip155:8453).
• live_holidays
  List upcoming or full-year public holidays for any covered country via Nager.Date — names, dates and whether they're nationwide. Essential for scheduling agents. Use this when an agent needs to upcoming public holidays for ~110 countries. x402 price $0.02/call (USDC, eip155:8453).
• crypto_price
  Live cryptocurrency prices from CoinGecko's public API: current price in USD/EUR/GBP/JPY plus 24-hour change for any coin by id or common ticker (btc, eth, sol…). Cached 60 seconds. Use this when an agent needs to live token prices and 24h change via CoinGecko. x402 price $0.02/call (USDC, eip155:84
• live_ip_lookup
  Geolocate any IPv4/IPv6 address (or the caller's own IP when omitted) via ipwho.is: country, region, city, coordinates, timezone, ASN/network owner and currency. Cached 24 hours per IP. Use this when an agent needs to where is an IP address? Country, city, ASN, timezone. x402 price $0.02/call (USDC,
• live_dns_lookup
  Query live DNS records (A, AAAA, MX, TXT, NS, CNAME, SOA) through Cloudflare's DNS-over-HTTPS resolver. Domain validation, email deliverability pre-checks and infrastructure discovery. Use this when an agent needs to real DNS records via Cloudflare DNS-over-HTTPS. x402 price $0.02/call (USDC, eip155
• live_url_metadata
  Fetch a URL server-side and extract its title, meta description, Open Graph and Twitter card tags, canonical URL and favicon — the data agents need to preview or classify a link. SSRF-guarded: private networks are blocked, 10s timeout, 1MB cap. Use this when an agent needs to title, description, OG
• live_qr_code
  Generate a QR code for any text, URL or crypto address: returns ready-to-embed SVG markup and a data URI, with configurable size and error-correction level. Use this when an agent needs to any text or URL as a QR code (SVG + PNG data URI). x402 price $0.01/call (USDC, eip155:8453).
• dev_token_estimator
  Estimate how many tokens a text consumes for each major model family (GPT, Claude, Gemini, Llama, DeepSeek) using a character/word heuristic that is within ~10% of real BPE tokenizers — enough for context budgeting and cost math, with zero dependencies. Use this when an agent needs to approximate to
• dev_llm_cost_calculator
  Calculate the API cost of an LLM call: input and output tokens × published per-million prices for 15 current models (OpenAI, Anthropic, Google, DeepSeek, xAI, Meta). Batch multiplier included for monthly estimates. Use this when an agent needs to tokens × current per-model prices = USD. x402 price $
• dev_text_chunker
  Split text into retrieval-friendly chunks with a token budget and sentence-aware boundaries. Overlap between consecutive chunks preserves context across splits — the standard preparation step before embedding. Use this when an agent needs to rAG-ready chunks with token budgets and overlap. x402 pric
• dev_hash
  Compute exact hash digests of UTF-8 text using Web Crypto (SHA family) and a verified pure-JS MD5 for legacy checksums. Deterministic — identical input always yields the identical digest. Use this when an agent needs to sHA-256 / SHA-512 / SHA-1 / MD5, exact digests. x402 price $0.01/call (USDC, eip
• dev_uuid
  Generate cryptographically random UUIDv4s or time-sortable UUIDv7s from a real CSPRNG, and validate any UUID's format, version and variant bits. Use this when an agent needs to random v4, sortable v7, plus strict validation. x402 price $0.01/call (USDC, eip155:8453).
• dev_text_extract
  Scan unstructured text and extract structured entities: email addresses, URLs, IPv4 addresses, phone numbers and domains. Deduplicated, categorized, machine-ready. Use this when an agent needs to pull emails, URLs, IPs, phones and domains from raw text. x402 price $0.01/call (USDC, eip155:8453).
• dev_diff
  Compare two texts line by line using an LCS diff: exact additions, removals and context — in unified-diff style. Deterministic, unlike asking a model to 'find the differences'. Use this when an agent needs to exact line-level diff with unified-style output. x402 price $0.01/call (USDC, eip155:8453).
• dev_url_parser
  Parse a URL into all its components: protocol, hostname, port, path segments, query parameters (as a clean object), hash and credentials. Exact — no guessing by eye. Use this when an agent needs to break any URL into protocol, host, path and params. x402 price $0.01/call (USDC, eip155:8453).
• crypto_random_generator
  Generate cryptographically secure randomness: passwords with charset rules, hex keys of any byte length, and uniform random integers (rejection sampling, no modulo bias). Never use Math.random for secrets. Use this when an agent needs to cSPRNG passwords, hex keys and uniform integers. x402 price $0
• crypto_wallet_snapshot
  One-call on-chain profile of any Ethereum or Base wallet via Blockscout: native balance, transaction and transfer counts, activity recency, top token holdings, and most frequent recent counterparties — with fresh-wallet and high-volume flags. The 'who is this address?' conclusion, not raw RPC data.
• dev_pdf_to_text
  Fetch a PDF (by URL, SSRF-guarded) or accept it as base64 and extract all readable text with page count. Deterministic parsing — no language model, so nothing is invented. Text-based PDFs only; scanned images need OCR (not included). Use this when an agent needs to extract readable text from any PDF
• dev_url_reader
  Fetch a web page server-side and convert it to clean markdown — headings, links, lists, tables and text, with scripts, styles and boilerplate stripped. The 'reader' pattern agents use to actually understand web pages. SSRF-guarded with redirects re-validated, 10s timeout, 1MB cap. Use this when an a
• dev_directory_search
  Describe what you need and get back matching x402-paid APIs: our own catalog (54 tools) plus, optionally, the live x402 Bazaar of third-party sellers. The agent's meta-tool — instead of knowing an API exists, ask for the capability. Use this when an agent needs to "I need a tool that does X" → match
• dev_natural_date
  Parse natural-language date and time expressions — "in two weeks", "next friday at 3pm", "dec 25th" — into exact ISO 8601 dates. Deterministic parsing (no LLM guessing); relative expressions resolve against a reference moment you control. Use this when an agent needs to "next friday 3pm" → exact ISO
• dev_cron_describe
  Turn a cron expression into plain English, validate it, and compute the exact next execution times. Deterministic — the answer to 'when does this cron actually fire?' without guessing. Use this when an agent needs to explain a cron expression and compute the next runs. x402 price $0.01/call (USDC, e
• dev_feed_parser
  Fetch an RSS or Atom feed and return normalized JSON items: title, link, publication date (ISO) and summary. Server-side fetching with SSRF guard; handles both RSS 2.0 and Atom dialects. Use this when an agent needs to any feed → clean JSON items, no XML parsing on your side. x402 price $0.02/call (
• dev_archive_lookup
  Query the Internet Archive's Wayback index for any URL: when it was first archived, the most recent snapshot, how many years it spans, and recent capture dates. Useful for fact-checking page history, finding deleted content and due-diligence. Use this when an agent needs to how the Internet Archive
• dev_ics_parser
  Parse iCalendar (.ics) content — meeting invites, conference calendars, exports from Google/Outlook — into structured event JSON: title, start/end, location, organizer and description. Use this when an agent needs to turn .ics calendar files into clean event JSON. x402 price $0.01/call (USDC, eip155
• dev_email_validator
  Validate an email address in two layers: strict RFC-style syntax, then a live DNS MX lookup on the domain to confirm the recipient actually runs mail servers. Catches the typos and fake domains that pure regex misses. Use this when an agent needs to syntax + live MX check — can this address receive
• databases_area_codes
  Look up any US telephone area code to find the state or territory it serves, or list every area code in a given state. Covers all 404 NANP codes in use, including overlays. Use this when an agent needs to all 404 NANP area codes → state lookup. x402 price $0.01/call (USDC, eip155:8453).
• crypto_new_pools
  Scan newly created DEX pools on Solana, Base, Ethereum, BSC, Arbitrum or Polygon, filtered by minimum liquidity and maximum age. Each pool comes with liquidity (USD), 24h volume, FDV, buy/sell counts and automatic risk flags (too fresh, thin liquidity, sell pressure). Powered by GeckoTerminal's publ
• crypto_tx_explain
  Explain what an EVM transaction would actually do: decodes the calldata (ERC-20 transfers/approvals via known ABIs, unknown selectors via the 4byte directory) and simulates the call against live chain state to report the outcome — including unlimited-approval warnings — without sending anything. Use
• dev_domain_availability
  Check whether a domain name is registered or available, via the official RDAP registry protocol (404 = available). For registered domains it also returns the registrar and creation/expiration dates — useful when an agent needs to name a product or verify how long a business has existed. Use this whe
• dev_page_verify
  Verify a claim about a web page's content: fetches the page (SSRF-guarded) and reports whether the expected text appears, with the surrounding excerpt as evidence. The deterministic way for an agent to confirm 'the site says X' before acting on it. Use this when an agent needs to does this page actu
• dev_api_health_check
  Probe a GET endpoint several times and report status codes and latency statistics (min/avg/max). The cheap way for an agent to verify an API — for example one found on the x402 Bazaar — responds before spending real money calling it. Use this when an agent needs to status and latency stats — test an
• dev_useragent_parse
  Parse a User-Agent header into structured data: browser (name/version), rendering engine, operating system, and device type/vendor/model. Deterministic — the same string always parses identically. Use this when an agent needs to uA string → browser, engine, OS and device. x402 price $0.01/call (USDC
• dev_table_extract
  Extract every HTML table from a page (or raw HTML) as structured JSON: headers and rows kept intact. The deterministic answer to 'get the pricing table / comparison table / stats table from this page' — no vision model needed. Use this when an agent needs to hTML tables → structured JSON rows and co
• nft_collection_due_diligence
  Full on-chain due-diligence report for any NFT collection: mint supply, unique holders, top-10 ownership concentration with a verdict, wash-trading indicators from transfer patterns, and recent activity trend. Read straight from the chain — the check an agent runs before its human buys. Use this whe
• nft_holder_distribution
  Top holders of any NFT collection with exact quantities, individual and cumulative ownership percentages, and concentration statistics — the distribution picture agents need before valuing or recommending a collection. Use this when an agent needs to who owns the collection, and how concentrated is
• nft_collection_activity
  Live transfer feed of an NFT collection with per-address accumulation analysis: net quantities received vs sent over recent activity, ranking the buyers adding to positions and the wallets exiting. The actionable view behind the raw transfer list. Use this when an agent needs to who is accumulating
• nft_wallet_nfts
  Look up an address's NFT portfolio across collections: each collection held, quantity owned, sorted by size. The enrichment endpoint for agents profiling wallets — pairs with wallet-snapshot for the full picture. Use this when an agent needs to every NFT collection a wallet holds, in one call. x402
• nft_collection_compare
  Compare any two NFT collections on the full due-diligence metric set: supply, holders, holder ratio, top-10 concentration, wash-trading score and activity trend — with a winner per metric. The head-to-head an agent runs before recommending one collection over another. Use this when an agent needs to
• live_web_search
  Search the web and return organic results: title, URL and snippet per result, with an optional country bias. Powered by the Brave Search API. Cached 1 hour per query; monthly quota is shared, so bursts may return a quota-exhausted error until the window resets. Use this when an agent needs to search
• live_timezone_convert
  Convert a specific wall-clock time between any two IANA time zones with DST-aware, exact offsets — the scheduling-agent operation that LLMs get wrong constantly. Shows both ISO timestamps and the offsets applied. Use this when an agent needs to a specific time, converted between any two zones. x402
• live_geocode
  Convert a place name into coordinates and location metadata via Open-Meteo's geocoding API: latitude, longitude, country, administrative region, timezone and population. The input every mapping/weather/travel agent needs first. Use this when an agent needs to city or place name → coordinates, countr
• crypto_ens_resolve
  Resolve ENS names to addresses and look up reverse records (address → ENS name) via viem against Ethereum mainnet public RPCs. ENS data lives on Ethereum L1 regardless of where the wallet is active. Use this when an agent needs to eNS name ↔ address, bidirectional on Ethereum mainnet. x402 price $0.
• crypto_token_balance
  Read an ERC-20 token balance for any wallet on Base or Ethereum via public RPC eth_call — no key, no indexer. Returns the raw balance, human-readable amount (decimals applied) and token symbol. Use this when an agent needs to any token balance for any wallet, via public RPC. x402 price $0.02/call (U
• crypto_gas_price
  Fetch the live gas price from public RPC nodes on Base or Ethereum: wei per unit gas, converted to gwei, with a USD estimate for a standard 21,000-gas transfer using your own ETH price input. No API key needed. Use this when an agent needs to current gas price in gwei and USD, straight from the chai
• dev_regex_tester
  Test a regular expression against text and see every match: the matched substring, its index, and all capture groups. Deterministic — the same pattern and text always produce the same result, unlike LLM-simulated regex matching. Use this when an agent needs to pattern + text → every match, group and
• dev_readability
  Compute readability metrics for a block of text: Flesch Reading Ease score, Flesch-Kincaid grade level, and word/sentence/syllable statistics. Deterministic formulas — useful for checking documentation, prompts and agent output clarity. Use this when an agent needs to flesch reading-ease and grade l
• dev_ics_generate
  Generate a valid RFC 5545 iCalendar file from JSON events: proper CRLF line endings, text escaping, line folding at 75 octets and a required DTSTAMP. The output imports cleanly into Google Calendar, Outlook and Apple Calendar. Use this when an agent needs to jSON events → valid .ics calendar file. x
• dev_og_image
  Generate a 1200×630 social-card PNG from a title and description — the image size every link-preview crawler expects. Rendered server-side with satori and returned as a base64 data URI, ready to embed in meta tags or download. Use this when an agent needs to social card PNG generated from title + de
• dev_scrape_selector
  Fetch a web page server-side (SSRF-guarded) and return every element matching a CSS selector as structured JSON: text content, attributes and HTML. Deterministic extraction for agents that need specific parts of a page without reading the whole document. Use this when an agent needs to fetch a page
• dev_npm_info
  Look up any package on the public npm registry: latest version, description, license, homepage, and publish dates for the first and most recent release. Agents use this to check dependencies before installing or to detect newly published versions. Use this when an agent needs to latest version, date
• dev_yaml_convert
  Convert YAML to JSON and JSON to YAML — the config-format bridge for CI files, Kubernetes manifests, docker-compose, agent configs and prompts. Parse errors are reported precisely; formatting is preserved via deterministic serialization. Use this when an agent needs to convert configs between YAML a
• dev_csv_convert
  Convert CSV to JSON (array of objects keyed by the header row) and JSON arrays back to CSV. Handles quoted fields with embedded delimiters, escaped quotes and multi-line values per RFC 4180 conventions. Use this when an agent needs to cSV to array-of-objects and back, with quote handling. x402 price
• security_ssl_inspector
  Inspect a live TLS certificate: subject, issuer, SAN domains, validity window, days to expiry, protocol version, cipher and the full chain length. Read directly from a TLS handshake — the definitive check an agent should run before trusting an API endpoint. Use this when an agent needs to cert detai
• security_security_headers
  Fetch a URL and grade its HTTP security headers: CSP, HSTS, X-Frame-Options, X-Content-Type-Options, Referrer-Policy, Permissions-Policy and COOP/CORP. Returns a 0–100 score, a letter grade, and a concrete recommendation for every missing header. Use this when an agent needs to grade a site's HTTP s
• security_whois_lookup
  Full registration record for a domain via RDAP (the modern WHOIS): registrar, creation/expiration/last-updated dates with days-to-expiry, nameservers, EPP statuses and DNSSEC. Straight from the authoritative registry — the data agents should cite for domain diligence. Use this when an agent needs to
• security_cve_lookup
  Look up any CVE in the US National Vulnerability Database (NVD): CVSS 3.1 score and severity vector, weakness (CWE) classification, human summary and references. The authoritative answer when an agent needs to know how bad a vulnerability actually is. Use this when an agent needs to cVSS score, seve
• security_totp_generator
  Generate the current TOTP two-factor code (RFC 6238) from a base32 secret — the same codes authenticator apps produce. Supports 6/8 digits, 30/60-second steps and SHA-1/256/512. Deterministic HMAC via Web Crypto; nothing is stored. Use this when an agent needs to rFC 6238 2FA codes from a base32 sec
• security_merkle_tree
  Build a keccak-256 sorted-pair merkle tree (OpenZeppelin convention) from a list of leaves and get the root plus a verification proof for any leaf — the standard construction for token airdrops and allowlists. Fully deterministic: same leaves, same root. Use this when an agent needs to root + proofs
• dev_json_schema_validator
  Validate a JSON document against a JSON Schema (draft 2020-12) with precise error paths — the exact check agents need before trusting structured output. Returns valid/invalid plus every violation with its JSON Pointer location and message. Use this when an agent needs to validate JSON against a draf
• dev_json_repair
  Repairs broken JSON: trailing commas, single quotes, unquoted keys, Python literals (True/False/None), NaN, comments, smart quotes and truncated documents. Built for the most common agentic failure mode — parsing slightly-wrong JSON from an LLM or a human. Use this when an agent needs to fix LLM-man
• dev_semver_checker
  Parse a semantic version into major/minor/patch/prerelease, test it against a SemVer range (^, ~, >=, *) and compare two versions with the exact upgrade class (major/minor/patch/prerelease). Deterministic — no approximating precedence rules from memory. Use this when an agent needs to parse, compare
• dev_markdown_to_html
  Convert Markdown to HTML with GitHub-flavored markdown support (tables, task lists, strikethrough, autolinks). Deterministic — the same markdown always yields byte-identical HTML, unlike LLM-approximated conversions. Use this when an agent needs to gFM markdown → clean HTML, exact output. x402 price
• live_air_quality
  Live air quality by city or coordinates from Open-Meteo's CAMS models: US AQI and European AQI with PM2.5, PM10, ozone, NO2, SO2 and CO concentrations. No API key, cached 30 minutes — the air-quality check agents should run instead of recalling stale numbers. Use this when an agent needs to uS + Eur
• live_earthquakes
  Recent earthquakes from USGS: filter by region (city or coordinates + radius), minimum magnitude and look-back window. Returns count, the largest event and a magnitude/place/depth table with links — live geophysical data agents cannot fabricate. Use this when an agent needs to recent quakes by regio
• live_wikipedia_summary
  Fetch the lead summary of any English Wikipedia article — the fast, grounded way to facts about companies, people, places and concepts. Fuzzy titles resolve via Wikipedia search, and the response includes the canonical page URL, short description and thumbnail. Use this when an agent needs to ground
• live_hacker_news
  Live Hacker News data from the official Firebase API: top, new and best story lists with scores and comment counts, or the full detail of any item id. Fresh from the source — no scraping, cached a few minutes. Use this when an agent needs to top/new/best stories or any item, via the API. x402 price
• live_dictionary
  Look up any English word: part-of-speech definitions with usage examples, IPA phonetics, pronunciation audio when available, and synonym/antonym lists. Live from the free Dictionary API — definitions agents can quote verbatim instead of inventing. Use this when an agent needs to definitions, phoneti
• geo_time_sunrise_sunset
  Compute sunrise, sunset, solar noon, civil dawn/dusk, golden hours and day length for any latitude/longitude and date — with the exact NOAA solar equations, accurate to about a minute. Answers agents repeatedly get wrong from memory. Use this when an agent needs to sun times, golden hour and day len
• geo_time_distance_calculator
  Great-circle (haversine) distance between two latitude/longitude points in km, miles and nautical miles, plus initial bearing and the geographic midpoint. Deterministic spherical math on the IUGG mean Earth radius. Use this when an agent needs to great-circle distance and bearing between coordinates
• geo_time_eu_vat_validate
  Validate any EU VAT number against VIES — the European Commission's live registry: validity, registered trader name and address by member state. The check every B2B invoice flow needs before applying the reverse charge. Use this when an agent needs to vIES-verified VAT numbers, live from the EU. x40
• crypto_address_validate
  Validate an EVM address: syntactic checks plus the EIP-55 checksum test (keccak-256 mixed-case). Returns the canonical checksummed form, flags addresses pasted with a broken checksum, and never guesses — an invalid checksum is an error, not a silent fix. Use this when an agent needs to eIP-55 checks
• finance_option_price
  European option pricing with the Black-Scholes-Merton model: exact price for calls and puts plus delta, gamma, theta, vega and rho, with dividend yield support. Deterministic closed-form math — the numbers agents should quote instead of hallucinating option values. Use this when an agent needs to bl
• crypto_apr_apy
  Convert APR (nominal annual rate) to APY (effective annual yield) for any compounding frequency including continuous — the exact DeFi math that decides whether a 10% APR pool really pays 10%. Deterministic closed-form, no approximations. Use this when an agent needs to nominal rate → effective yield
• crypto_impermanent_loss
  Compute impermanent loss for a 50/50 constant-product AMM position at any relative price move, with a reference table of common moves. Deterministic closed-form — the exact divergence number an LP should compare against farming rewards. Use this when an agent needs to aMM divergence loss for any pri
• finance_amortization_schedule
  Full loan amortization: the exact monthly payment, a year-by-year principal/interest/balance table, total interest, and the effect of extra monthly payments — payoff months saved and interest saved. Deterministic mortgage math agents can quote line by line. Use this when an agent needs to full yearl
• security_password_strength
  Scores a password by information entropy: character-pool size, length, crack-time against an offline attack (10^10 guesses/s), and common-password/pattern detection. Evaluated in memory only, never stored or logged — the honest math behind 'is this password good?'. Use this when an agent needs to en
• security_cvss_calc
  Compute a CVSS 3.1 base score from its vector string using the exact FIRST specification (weights, scope handling, and the rounding function). Pairs with cve-lookup: paste any vector and get the score, severity band, and metric breakdown. Use this when an agent needs to vector string → exact base sc
• security_ssl_expiry
  Fast TLS certificate expiry check: days remaining, issuer, validity window and an expired/expiring-soon flag, read live from a TLS handshake. The cheap monitoring primitive agents should call on a schedule before a cert lapses and an integration breaks. Use this when an agent needs to days until a c
• security_mx_lookup
  Query the MX records for any domain via DNS-over-HTTPS: every mail exchanger with its priority, sorted so the primary (lowest number) comes first. The definitive check for 'can this domain receive email' before sending anything. Use this when an agent needs to mail exchangers by priority, live from
• dev_cron_next_runs
  List the next N executions of a cron expression with exact timestamps — from now or from any reference datetime. Complements cron-describe (which explains what an expression means) with the concrete schedule agents need when scheduling their own work. Use this when an agent needs to exact upcoming e
• dev_iso_duration
  Convert ISO 8601 durations (P1DT2H30M) to total seconds and back — including weeks — with a component breakdown. The unambiguous duration math agents should use for retries, TTLs and scheduling instead of mental arithmetic. Use this when an agent needs to durations ↔ seconds, exact in both direction
• media_color_convert
  Convert any color between hex, RGB and HSL with WCAG relative luminance — exact integer/channel math, no drift. Accepts #abc, #aabbcc, rgb() and hsl() input and reports every representation plus a light/dark verdict. Use this when an agent needs to hex ↔ RGB ↔ HSL + luminance, exact. x402 price $0.0
• media_contrast_check
  Compute the WCAG 2.1 contrast ratio between a text and background color with pass/fail against every accessibility threshold: AA and AAA for normal and large text, plus the 3:1 UI-component minimum. Exact luminance math — the check every design system needs. Use this when an agent needs to contrast
• media_exif_reader
  Extract EXIF metadata from a JPEG: camera make/model, lens, exposure settings, timestamps, orientation and GPS coordinates as decimal lat/lon. The OSINT-standard check for where a photo really came from — parsed in memory, never stored. Use this when an agent needs to camera, settings and GPS from a
• geo_time_sun_position
  Where the sun is in the sky right now — or at any timestamp — for any coordinates: azimuth (compass bearing), elevation angle, cardinal direction, right ascension and declination, from the NOAA solar equations. Deterministic astronomy for shadow math, solar-panel orientation and photo planning. Use
• crypto_stablecoin_metrics
  Live stablecoin health from DefiLlama: current price vs $1 peg, depeg distance, total circulating supply, backing type and the chain breakdown of where the supply lives. The due-diligence read before an agent touches a stablecoin. Use this when an agent needs to peg, supply and chains for any stable
• crypto_yield_pools
  Live lending/liquidity yields from DefiLlama: top pools by APY filtered by chain, stablecoin-only pairs, minimum TVL and a sane-APY cap that filters out runaway incentive numbers. Returns project, pair, chain, APY and TVL — the discovery step before reward-rate math. Use this when an agent needs to
• security_spf_check
  Fetch and parse a domain's SPF record: authorized senders (ip4/ip6/mx/a/include), lookup count against the 10-DNS-lookup limit, and the final policy qualifier. Flags too-permissive (+all), missing records and over-limit configurations that silently break mail delivery. Use this when an agent needs t
• security_dmarc_check
  Fetch and grade a domain's DMARC record at _dmarc.<domain>: policy (none/quarantine/reject), alignment modes, aggregate-report (rua) and failure-report (ruf) destinations, and the percentage applied. DMARC is what actually stops spoofing — p=none grades C even though most domains sit there. Use this
• security_email_security_audit
  Full inbound/outbound email authentication audit for a domain: MX reachability, SPF policy grade, DKIM selector discovery across common selectors, DMARC policy grade, and a composite score with concrete fixes. One call instead of five — the diligence an agent runs before trusting or emailing a domai
• security_cert_transparency
  Enumerate a domain's subdomains from public Certificate Transparency logs via crt.sh — every TLS certificate ever issued for the domain or its subdomains, deduplicated. The passive-recon standard: reveals staging hosts, admin panels and internal naming without touching the target. Use this when an a
• security_dnsbl_check
  Check an IPv4 address against four major public DNS blocklists (Barracuda, SpamCop, SORBS, DroneBL). A listing means the IP sent spam or abuse — mail sent from it will bounce or junk across the internet. The pre-flight check before sending email from any server or relay. Use this when an agent needs
• security_phishing_heuristics
  Score a URL for phishing patterns: homoglyph/IDN look-alikes, brand tokens in subdomains, IP-literal hosts, @-tricks, excessive length/hyphens/depth, high-abuse TLDs, punycode and non-standard ports. Pure analysis of the string itself — the pre-click check for links from emails, QR codes or chat. Us
• dev_json_diff
  Compare two JSON documents structurally — every added, removed and changed value reported with its RFC 6901 JSON Pointer path, not a text blob. Objects and arrays recurse; type changes (string → number) are flagged as changes. Deterministic, unlike eyeballing or text diffs. Use this when an agent ne
• dev_json_to_ts
  Generate TypeScript interfaces from a JSON sample: nested objects become named interfaces, arrays collapse to their element type, mixed arrays become unions, and keys that need quotes are handled. Deterministic — the same JSON always produces the same types. Use this when an agent needs to jSON samp
• dev_csv_validator
  Validate CSV structure before ingesting it: RFC 4180-aware parse, ragged rows, column-count consistency against the header or an expected schema, duplicate headers, stray quotes and empty-cell counts. Deterministic — every issue cites its exact row number. Use this when an agent needs to structural
• live_currency_convert
  Convert any amount between 30+ fiat currencies at the latest European Central Bank reference rates (Frankfurter, no API key). Returns the converted amount and the exact rate applied — live data agents should use instead of guessing exchange rates from memory. Use this when an agent needs to convert
• live_fx_history
  Historical exchange-rate series for any ECB currency pair over the last N days: start/end rates, high, low, average and percentage change, plus the daily table. The auditable answer to 'how did EUR/USD move this month' for reports and pricing decisions. Use this when an agent needs to time series of
• live_crypto_fear_greed
  The Crypto Fear & Greed Index: today's 0–100 sentiment score with its classification, plus the last 8 days for trend context. Sentiment blends volatility, momentum, social media, dominance and trends — a useful contrarian signal agents can cite with a number. Use this when an agent needs to market s
• live_mempool_fees
  Live Bitcoin fee market from mempool.space: recommended sat/vB tiers (fastest / 30 min / 1 hour / economy / minimum), unconfirmed-transaction backlog, and the total fee cost for your transaction's size in vBytes. No more guessing sats before broadcasting. Use this when an agent needs to live sat/vB
• finance_irr_npv
  Compute NPV at any discount rate and solve IRR (bisection on the IRR equation) for a period cash-flow series: investment analysis, project comparison and bond-style math with exact, reproducible results. Period 0 is the initial outflow. Use this when an agent needs to internal rate of return + disco
• geo_time_meeting_planner
  Given 2-8 cities, find the UTC hours where everyone sits inside acceptable local business hours (default 9-17) for a given date — DST-correct via the IANA tz database. Returns every feasible hour with each city's local time, or the best partial-overlap hours if none fit. Use this when an agent needs
• security_tls_versions
  Probe a server's TLS configuration: which protocol versions (TLS 1.0 → 1.3) it accepts, the cipher negotiated for each, and a downgrade-risk verdict. Legacy protocols still accepting connections are flagged — weak TLS is a compliance finding agents get asked about. Use this when an agent needs to wh
• security_cookie_audit
  Fetch a URL and audit every Set-Cookie it sends: name, and whether Secure, HttpOnly and SameSite are present — the three flags that decide whether a cookie survives transport, XSS and CSRF. Session cookies missing flags are exactly how session hijacking happens. Use this when an agent needs to every
• security_reverse_dns
  Resolve the PTR record for any IPv4 or IPv6 address — the hostname the IP's owner configured in reverse DNS. Reveals hosting providers, mail-server identities and corporate naming; a missing PTR on a mail source is also a deliverability red flag. Use this when an agent needs to what hostname claims
• security_caa_check
  Query and parse a domain's CAA records: which certificate authorities are authorized to issue TLS certificates, whether wildcards are covered separately, and where violation reports go. A CAA policy locks the domain against mis-issuance by CAs the owner never chose. Use this when an agent needs to w
• security_homoglyph_detect
  Scan text or a domain for homoglyph attacks: Cyrillic and Greek characters that render identically to Latin letters (а vs a, р vs p). Returns every impostor position with its Latin equivalent and the fully normalized ASCII rendering — the definitive check for spoofed brands and IDN domains. Use this
• geo_time_moon_phase
  Compute the moon's phase for any date: age in the synodic cycle, illuminated fraction, phase name, and the dates of the next new and full moons. Deterministic astronomy on the mean synodic month — the night-sky fact agents constantly misremember. Use this when an agent needs to phase, illumination a
• geo_time_plus_codes
  Convert coordinates to an Open Location Code (Google Plus Code) and back, with the decoded bounding box. Plus codes give every 14×14-meter spot on Earth a short address that works without street names — ideal where addresses don't exist. Use this when an agent needs to coordinates ↔ shareable plus c
• live_iss_position
  Live position of the International Space Station: latitude, longitude, altitude, orbital velocity and whether it's currently in daylight — fetched the moment you call. A genuinely live fact no model can know, ideal for demos and tracking automations. Use this when an agent needs to where the Interna
• live_nasa_neo
  Upcoming near-earth object close approaches from NASA's official NeoWs API: names, estimated diameters, miss distances in kilometers, relative velocities and the hazard classification. Live planetary-defense data — the kind of fact agents cannot invent. Use this when an agent needs to upcoming aster
• live_number_fact
  Look up the fact attached to any number from the Numbers API: pop-culture trivia, mathematical properties, day-of-year facts and historical years. The kind of color that makes explanations memorable — cited from the dedicated database, not invented. Use this when an agent needs to trivia, math or hi
• crypto_protocol_tvl
  Live total value locked for any DeFi protocol from DefiLlama: current TVL, per-chain breakdown, 1-day/7-day/1-month change percentages and market cap where available. The due-diligence snapshot an agent should pull before quoting a protocol's size or health. Use this when an agent needs to total val
• dev_jwt_create
  Create a properly signed HS256 JWT: iat/exp set from the chosen lifetime, optional iss/sub claims, URL-safe base64 — the exact token format your API middleware validates. Built for generating test tokens during development; never use with a production secret. Use this when an agent needs to sign a t
• dev_case_all
  Convert any text into all ten naming conventions at once: camelCase, PascalCase, snake_case, CONSTANT_CASE, kebab-case, dot.case, Title Case, Sentence case, lower and UPPER — split correctly on camel humps, spaces, hyphens, underscores and dots. One call instead of ten lookups. Use this when an agen
• dev_text_normalize
  Normalize messy text into clean, comparable form: Unicode NFC composition, accent folding (café → cafe), zero-width and invisible-character removal, control-character stripping and whitespace collapsing. The preprocessing step that makes string comparison and deduplication trustworthy. Use this when
• dev_fake_data
  Generate realistic-looking test data: users, companies, Luhn-valid test cards and addresses. Deterministic by seed — the same seed always produces identical records, so your tests and fixtures are reproducible. All data is synthetic; card numbers pass Luhn but are not real accounts. Use this when an

Tool changes

• 2026-10-22: calculators_percentage_calculator, dev_base64_encode, databases_countries, calculators_discount_calculator, calculators_tip_calculator, calculators_vat_calculator, calculators_bmi_calculator, calculators_date_difference_calculator, calculators_age_calculator, calculators_loan_payment_calculator, calculators_compound_interest_calculator, calculators_fuel_cost_calculator
• 2026-10-20: calculators_percentage_calculator, dev_base64_encode, databases_countries, calculators_discount_calculator, calculators_tip_calculator, calculators_vat_calculator, calculators_bmi_calculator, calculators_date_difference_calculator, calculators_age_calculator, calculators_loan_payment_calculator, calculators_compound_interest_calculator, calculators_fuel_cost_calculator
• 2026-10-18: calculators_percentage_calculator, dev_base64_encode, databases_countries, calculators_discount_calculator, calculators_tip_calculator, calculators_vat_calculator, calculators_bmi_calculator, calculators_date_difference_calculator, calculators_age_calculator, calculators_loan_payment_calculator, calculators_compound_interest_calculator, calculators_fuel_cost_calculator
• 2026-10-17: calculators_percentage_calculator, dev_base64_encode, databases_countries, calculators_discount_calculator, calculators_tip_calculator, calculators_vat_calculator, calculators_bmi_calculator, calculators_date_difference_calculator, calculators_age_calculator, calculators_loan_payment_calculator, calculators_compound_interest_calculator, calculators_fuel_cost_calculator
• 2026-10-16: calculators_percentage_calculator, dev_base64_encode, databases_countries, calculators_discount_calculator, calculators_tip_calculator, calculators_vat_calculator, calculators_bmi_calculator, calculators_date_difference_calculator, calculators_age_calculator, calculators_loan_payment_calculator, calculators_compound_interest_calculator, calculators_fuel_cost_calculator

Repository · JSON · Text for agents · Registry updated 2026-10-21