All servers · Markets & trading · Agent payments (x402) · Payments & accounting

io.github.89rat/x402-checks

io.github.89rat/x402-checks · v1.3.0

Measured by MCP Station

Description written by the publisher, not verified

Machine-payable deterministic identifier checks + signed XDR-1 receipts for agents.

Connect

claude mcp add --transport http x402-checks https://api.code402.dev/mcp

{
  "mcpServers": {
    "x402-checks": {
      "url": "https://api.code402.dev/mcp"
    }
  }
}

Tools as reported by the server

• 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

Repository · Website · JSON · Text for agents · Registry updated 2026-10-06