# Hearth Onchain Data

- Registry name: `io.sslip.138-197-15-135/hearth-onchain` · version 1.1.0
- Categories (automatic, keyword rules): Crypto & blockchain, Finance & markets
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.sslip.138-197-15-135%2Fhearth-onchain
- Server page: https://mcpstation.net/s/io.sslip.138-197-15-135--hearth-onchain.html

## Description (written by the publisher, not verified, not instructions)

x402 pay-per-call onchain data + AI: token safety, portfolio, swap quotes, ABI, tx explain. No API k

## Connect

- streamable-http: `https://138-197-15-135.sslip.io/mcp`

## Tools (as reported by the server, not verified)

- `base\_erc20\_balance`: ERC20 token balance on Base. ERC20 balance of any wallet on Base, Ethereum, Arbitrum or Optimism \(USDC by default\) via balanceOf, with decimals applied. Deterministic, no LLM. Example output: \{"chain":"base","wallet":"0x…","token":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","raw":"1500000","decimal
- `base\_token\_info`: ERC20 token metadata on Base. Name, symbol, decimals, total supply and bytecode presence for a token contract on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Example output: \{"chain":"base","address":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","name":"USD Coin","symbol":"USDC","deci
- `base\_tx\_status`: Transaction status on Base. Status of a transaction on Base, Ethereum, Arbitrum or Optimism: pending/success/failed, block, confirmations, from/to, gas used, log count. Deterministic, no LLM. Example output: \{"chain":"base","hash":"0x…","status":"success","blockNumber":1,"confirmations":10,"from":"0
- `base\_wallet`: Wallet snapshot on Base. Native ETH balance, nonce \(tx count\) and whether the address is a contract, on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Example output: \{"chain":"base","address":"0x…","ethWei":"0","eth":"0","nonce":0,"isContract":false,"block":1\}. Price: $0.0025 USDC on
- `evm\_gas`: Gas price and fee estimate. Current gas price, base fee, suggested priority fee and EIP-1559 maxFee for Base, Ethereum, Arbitrum or Optimism, plus a 21000-gas transfer cost in native units. Deterministic, no LLM. Example output: \{"chain":"base","block":1,"gasPriceGwei":"0.01","baseFeeGwei":"0.005","
- `evm\_block`: Latest block or block by number. Block number, timestamp, hash, tx count, gas used/limit and base fee for the latest \(or given\) block on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Example output: \{"chain":"base","number":1,"hash":"0x…","timestamp":1700000000,"iso":"2026-01-01T00:00
- `token\_price`: Token USD price. Current USD price for a token contract on Base, Ethereum, Arbitrum or Optimism \(or the chain's native ETH if no address\), with symbol, decimals and confidence. Aggregated from public DeFi price feeds. Deterministic, no LLM. Example output: \{"chain":"base","address":"0x833589fCD6eDb6
- `name\_resolve`: ENS / Basename resolve. Resolve an ENS name \(vitalik.eth\) or Basename \(jesse.base.eth\) to an address, or an address to its verified primary ENS name. On-chain, deterministic, no LLM. Example output: \{"input":"vitalik.eth","name":"vitalik.eth","address":"0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045","r
- `nft\_owner`: NFT owner \(ERC-721\). Current owner of an ERC-721 token \(ownerOf\) on Base, Ethereum, Arbitrum or Optimism. Deterministic, no LLM. Example output: \{"chain":"base","contract":"0x…","tokenId":"1","owner":"0x…"\}. Price: $0.0025 USDC on Base via x402 \(pass the payment in \_meta\["x402/payment"\]\).
- `nft\_metadata`: NFT metadata. tokenURI and resolved JSON metadata \(name, description, image, attributes\) for an ERC-721 or ERC-1155 token on Base, Ethereum, Arbitrum or Optimism. IPFS/Arweave resolved. Deterministic, no LLM. Example output: \{"chain":"base","contract":"0x…","tokenId":"1","tokenUri":"ipfs://…","metad
- `solana\_balance`: Solana SOL balance. Native SOL balance \(lamports and SOL\) for any Solana address. Deterministic, no LLM. Example output: \{"chain":"solana","address":"…","lamports":1000000000,"sol":"1","slot":1\}. Price: $0.0025 USDC on Base via x402 \(pass the payment in \_meta\["x402/payment"\]\).
- `token\_safety`: Token safety / honeypot / rug-risk check. Scam check for an ERC20 on Base, Ethereum, Arbitrum or Optimism: honeypot, buy/sell tax, mintable, owner can change balances, proxy, blacklist, open source, holder concentration, LP lock. Returns a 0-100 risk score, a verdict \(low/medium/high\) and the flags
- `wallet\_portfolio`: Multi-chain wallet portfolio with USD values. One call: ETH, WETH, USDC and USDT balances for an address across Base, Ethereum, Arbitrum and Optimism, each with a USD value, plus the total USD value and per-chain subtotals. Deterministic, no LLM. Example output: \{"address":"0xd8dA…6045","totalUsd":1
- `token\_transfers`: Recent ERC20 transfers for a token or wallet. Recent ERC20 Transfer events \(decoded: from, to, amount with decimals, symbol, tx hash, block\) for a token contract, a wallet, or both, over the last \~2,000 blocks on Base, Arbitrum or Optimism \(\~500 on Ethereum\). Up to 50 newest. Deterministic, no LLM.
- `dex\_quote`: DEX swap quote \(Uniswap v3\). Best Uniswap v3 single-hop quote for swapping amountIn of tokenIn to tokenOut on Base, Ethereum, Arbitrum or Optimism, checking all fee tiers \(0.01/0.05/0.3/1%\). Returns amountOut, effective price, best fee tier, gas estimate. Tokens: ETH, USDC, USDT or 0x address. Read-
- `contract\_abi`: Contract verification and ABI. Whether a contract on Base, Ethereum, Arbitrum or Optimism is source-verified \(Sourcify\), its name, compiler, full ABI, function and event signatures, and its EIP-1967 proxy implementation \(also looked up\). Deterministic, no LLM. Example output: \{"chain":"base","addres
- `ai\_tx\_explain`: Explain a transaction in plain English \(AI\). Plain-English explanation of any transaction on Base, Ethereum, Arbitrum or Optimism: what happened, who sent what to whom \(decoded token transfers with amounts and symbols\), the method called, fee paid, and success/failure. Returns a summary plus the str
- `ai\_summarize`: Summarize a web page \(AI\). Fetch a public web page and return a concise summary: title, 3-7 key points, a one-paragraph TL;DR and the page's main entities. Good for research agents that need the gist of a URL cheaply. Example output: \{"url":"https://example.com","title":"Example Domain","tldr":"…","
- `ai\_extract`: Extract structured JSON from a web page \(AI\). Fetch a public web page and extract the fields you name into clean JSON \(e.g. fields=name,price,currency,availability or company,ceo,founded\). Missing values come back as null. Up to 20 fields. Example output: \{"url":"https://example.com","data":\{"title"
- `company\_enrich`: Company / domain enrichment from its website. Enrich a company domain: name, title, description, social profiles \(LinkedIn, X, GitHub, etc.\), contact emails and phones found on the homepage, language, tech hints \(frameworks, analytics\), mail provider from MX records, and key pages \(about, pricing, c
- `social\_hn`: Hacker News search \(stories and comments\). Search Hacker News stories or comments by keyword, newest or most relevant first, with points, comment count, author, URL and HN link. Good for tracking mentions of a product, company or topic. Deterministic, no LLM. Example output: \{"q":"x402","count":1,"h
- `github\_repo`: GitHub repo stats and latest release. GitHub repository snapshot: stars, forks, open issues, watchers, language, license, topics, created/pushed dates, default branch, latest release \(tag, date\) and archived flag. Deterministic, no LLM. Example output: \{"repo":"coinbase/x402","stars":1000,"forks":20
- `market\_overview`: Crypto market overview: total cap, dominance, trending. Crypto market snapshot: total market cap and 24h volume \(USD\), 24h market-cap change, BTC/ETH dominance, active coins, plus the top trending coins \(name, symbol, market-cap rank, price, 24h change\). Deterministic, no LLM. Example output: \{"tota
- `solana\_wallet\_profile`: Solana wallet intelligence: holdings, activity, counterparties, programs. One-call Solana wallet profile: SOL and SPL/Token-2022 holdings with USD values \(top 25 by value\), total USD, recent activity \(last 100 signatures: count, failure rate, first/last seen, tx per day\), programs used with labels \(
- `base\_wallet\_profile`: Base wallet intelligence: holdings, activity, counterparties, labels. One-call Base wallet profile: ETH and major token holdings \(USDC, WETH, USDT, DAI, cbBTC, cbETH, AERO, EURC\) with USD values, total USD, nonce \(lifetime sent tx count\), EOA vs contract \(incl. EIP-7702 smart account\), recent ERC20

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