io.github.89rat/x402-checks

Tools

• balance_check

  Read native ETH and USDC balances on Base with raw units and decimals. A balance snapshot is not proof of solvency, ownership or future payment ability; upstream reads can fail.

  shallow
• 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.

  shallow
• block_info

  Latest (or specified) Base block header: number, timestamp, transaction count, base fee. Preflighted before payment.

  shallow
• 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.

  shallow
• 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 an EIP-3009 signed voucher.

  shallow
• clean_markdown_scraper

  Transform noisy HTML web documents into clean, LLM-optimized Markdown while preserving semantic headers and links.

  shallow
• code402_create_listing

  Create or update a paid listing for a registered seller: POST /v1/sellers/{sellerId}/services with { serviceId, upstream_url, price_usd, method?, description? }. The gateway then serves the listing at /s/{sellerId}/{serviceId} behind an x402 paywall paying the seller's wallet directly. Returns { listing, paid_endpoint }.

  shallow
• code402_gateway_health

  Check the code402 gateway's /healthz: returns { status, service, network } where network is the settlement chain currently configured (e.g. base-sepolia or base).

  shallow
• code402_get_agent_reputation

  Fetch an agent's tamper-evident reputation credential from the code402 Atlas rail: GET /v1/agent/{agent_id}/reputation. The credential is an HMAC-signed, expiring (10-minute TTL) bundle over a hash-chained outcome ledger — settled_ok, settled_fail, distinct_hosts, volume_units, reputation_score — verifiable without any shared secret via POST /v1/reputation/verify. Sellers use this to price counterparty risk before serving a new agent.

  shallow
• code402_get_seller_analytics

  Fetch a seller's own settlement analytics (free): GET /v1/sellers/{sellerId}/analytics. Returns { total_settled_calls, gross_usd, unique_buyers, by_service: [{ service_id, calls }] }.

  shallow
• code402_get_seller_invoice

  Compute a seller's platform-fee invoice from settled receipts: GET /v1/sellers/{sellerId}/invoice?since={unix_ms}. Returns { tier, transactions, gross_usdc_units, platform_fee_usdc_units, seller_net_usdc_units, fee_bps }. Amounts are integer USDC base units (6 decimals).

  shallow
• code402_get_service

  Fetch a single service from the code402 storefront by its serviceId (as returned by code402_list_services). Returns the same service shape as code402_list_services, or an error naming close matches when the id is unknown.

  shallow
• code402_list_services

  List services on the code402 gateway storefront (GET /v1/services): first-party APIs and third-party seller listings, each with method, URL, USDC price, and network. No account or API key exists or is needed anywhere on the gateway — paid services are accountless, priced per call via x402. Paying for a service requires an x402-capable HTTP client with the buyer's own wallet — this tool only discovers. Returns { total, count, offset, has_more, next_offset?, services: [{ serviceId, name, description, method, url, price, price_usdc_units, network }] }.

  shallow
• code402_probe_endpoint

  Send an unpaid GET to any public https URL and report whether it answers with a valid x402 402 challenge, plus normalized terms { scheme, network, amount (USDC base units), price (dollars), payTo, asset }. Use before budgeting a payment or to liveness-check a listing. No payment is ever sent. Private/internal addresses are rejected.

  shallow
• code402_register_seller

  Register a seller on the code402 gateway (or update its name — the payout wallet is immutable once set; re-binding requires EIP-191 proof): POST /v1/sellers with { id, wallet, name }. Payments for the seller's listings settle directly to this wallet (non-custodial). Registration is free; fees are 0.099% of settled volume, invoiced monthly against receipts (accrued until $9). Pro is $9/mo at 0% take. Returns { sellerId, wallet, storefront }. Prove wallet ownership later via the gateway's EIP-191 verify-challenge flow.

  shallow
• code402_trust_check

  Query the code402 Atlas index for measured trust evidence on an endpoint or domain: probe-verified liveness (probedAlive), evidence tier (probe vs asserted), and ready-to-pay settlement terms (payTo, asset, CAIP-2 network, integer USDC amountUnits) when measured. Use before letting an agent pay any endpoint. Verified evidence is measured by probes, never self-reported. Returns { count, results: [{ title, url, probedAlive, evidence, settlement? }] }.

  shallow
• 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.

  shallow
• crypto_ticker

  Current spot price (USD) for a symbol via the public CoinGecko API; common tickers (btc, eth, …) are mapped to CoinGecko ids automatically. Cached 60s server-side; preflighted so you never pay during an API outage.

  shallow
• erc20_balance

  Raw + formatted ERC-20 balanceOf for an address at any token contract on Base. Decimals read on-chain. Preflighted so you never pay during an RPC outage.

  shallow
• fx_spot_price_oracle

  High-precision fiat & stablecoin foreign exchange spot rates (USDC, EUR, GBP, JPY, etc.) computed from TWAP edge oracles.

  shallow
• gstin_check

  Validate an Indian GSTIN by structure (2-digit state code + PAN + entity code + 'Z') and its mod-36 cross-sum checksum.

  shallow
• iban_check

  Validate IBAN structure and MOD-97 checksum. Does not establish account ownership, beneficiary identity or absence of fraud.

  shallow
• ifsc_check

  Check the 11-character Indian IFSC format, including its fifth-character zero. No bank-branch registry lookup or account verification.

  shallow
• 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.

  shallow
• instant_json_schema_verifier

  Validate JSON data payloads against schema definitions. Preflighted for agent tool call pipelines.

  shallow
• lei_check

  Validate a 20-character LEI and MOD-97 check digits. No registry lookup, active-registration check or legal-entity identity verification.

  shallow
• 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.

  shallow
• 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 prove funds moved or any business claim.

  shallow
• sanctions_address_screen

  Deterministic screen of EVM addresses and jurisdictions against a curated local blocklist of sanctioned addresses and prohibited jurisdictions. Address- and jurisdiction-level only — this is NOT name-based screening and NOT a complete OFAC SDN check. Absence of a match is not a sanctions clearance; use as one informational input alongside your own compliance process.

  shallow
• swift_bic_check

  Check SWIFT/BIC structure and country code. Does not establish bank existence, active routing or beneficiary identity.

  shallow
• 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.

  shallow
• tx_activity

  On-chain activity snapshot: total outbound nonce, bytecode check (is_contract), and funded status on Base. Preflighted before payment.

  shallow
• 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.

  shallow
• 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.

  shallow

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