# io.github.89rat/code402

- Registry name: `io.github.89rat/code402` · version 1.0.1
- Categories (automatic, keyword rules): Payments & accounting, Finance & markets, Markets & trading, Agent payments (x402)
- Authentication at last check: No auth
- Declared risk: Read-only (all tools declare readOnlyHint)
- Capabilities (declared by the server): prompts, resources, tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.89rat%2Fcode402
- Server page: https://mcpstation.net/s/io.github.89rat--code402.html

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

Discover machine-payable APIs, probe x402 payment terms, and run seller operations. Non-custodial.

## Connect

- streamable-http: `https://rail.hcrb.in/mcp`

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

- `crypto\_ticker`: Spot USD price for a crypto ticker or CoinGecko id from public price feeds, cached 60 s. Result carries a signed receipt.
- `erc20\_balance`: Raw and formatted ERC-20 balanceOf for an address on Base, with decimals read from the token. Result carries a signed receipt.
- `fx\_spot\_price\_oracle`: Reference fiat and stablecoin conversion rate from a static table, not a live feed. Returns rate and inverse; result carries a signed receipt.
- `block\_info`: Base block header: number, timestamp, transaction count and base fee for the latest or a given block. Result carries a signed receipt.
- `tx\_activity`: Outbound transaction count \(nonce\) and contract-or-EOA check for an address on Base. Result carries a signed receipt.
- `token\_contract\_risk`: Deterministic Base contract facts: ERC-20 metadata, proxy slots, owner\(\), privileged-function selectors and flags. Not a safety verdict. Result carries a signed receipt.
- `clean\_markdown\_scraper`: Fetch a public web page by URL \(or take your HTML\) and return Markdown plus headings. No JavaScript rendering. Result carries a signed receipt.
- `context\_distill`: Deterministic text digest: word count, top-5 most frequent meaningful words \(stop words excluded\), first sentence, and a keccak-256 content hash. Pure function — no external calls, no ML.
- `instant\_json\_schema\_verifier`: Validate JSON data payloads against schema definitions. Preflighted for agent tool call pipelines.
- `balance\_check`: Native ETH and one ERC-20 balance \(default USDC\) for an address on Base, raw and formatted. Result carries a signed receipt.
- `calculate\_fx\_savings`: Arithmetic comparison of a USDC settlement against comparator percentages YOU supply \(bank\_fee\_pct, custodial\_fee\_pct\) across 14 global fiat currencies. The comparators are assumptions, not measurements of any bank or provider; no protocol fee is deducted on this rail.
- `iban\_check`: Validate IBAN structure and MOD-97 checksum. Does not establish account ownership, beneficiary identity or absence of fraud.
- `lei\_check`: Validate a 20-character LEI and MOD-97 check digits. No registry lookup, active-registration check or legal-entity identity verification.
- `vat\_mod97\_check`: Check the supported Belgian VAT format and MOD-97 checksum. BE only; not VIES, other EU VAT formats, registration status or tax compliance.
- `swift\_bic\_check`: Check SWIFT/BIC structure and country code. Does not establish bank existence, active routing or beneficiary identity.
- `batch\_validate`: Run up to 50 supported \{tool, value\} checks in one request. Each result states its scope. Compare the current batch quote with individual quotes; savings depend on batch size.
- `vendor\_onboarding\_pack`: Check supplied IBAN, LEI, Belgian VAT and UK company-number fields in one result. Structural checks only; no ownership, registry or fraud clearance.
- `india\_supplier\_check`: One call, one receipt: GSTIN + PAN + UPI VPA + IFSC for an Indian counterparty. Four deterministic structural checks, each stating its own scope. Built for cross-border procurement where the buyer is an agent that cannot open an INR account.
- `pre\_disbursement\_guard`: Evaluate supplied identifiers, domain-age evidence and mismatch signals. Requires a preceding receipt hash. An advisory result is not verified identity, fraud clearance or authorization to release funds.
- `gstin\_check`: Validate an Indian GSTIN by structure \(2-digit state code + PAN + entity code + 'Z'\) and its mod-36 cross-sum checksum.
- `ifsc\_check`: Check the 11-character Indian IFSC format, including its fifth-character zero. No bank-branch registry lookup or account verification.
- `sanctions\_address\_screen`: Exact EVM-address comparison against the identified address snapshot and existing operator block policy. Current legal status is unknown; is\_sanctioned is null. valid=false preserves a local block; valid=null never authorizes a transaction. Names are not screened. Missing, stale or incomplete eviden
- `check\_price`: Instant zero-cost pricing hook for code402 tools. Returns the live price, an opaque quote\_id, TTL, and the settlement URL. Free forever — feeds the price index into an agent planner's context without creating any financial obligation. If the planner acts on the quote, it hits the settlement\_url with
- `receipt\_verify`: Verifies a signed XDR-1 receipt from ANY x402 service: recomputes the canonical digest and recovers the signer, then compares it to the declared signer. Free forever — no account, no quota, no storage \(stateless\). A valid receipt proves the signer signed that tool call at that timestamp; it does NOT

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