Validates a 402 challenge — fetched from a URL without paying, or supplied directly — against PaymentRequiredV1Schema and PaymentRequiredV2Schema of the installed @x402/core reference implementation. Reports the detected version and how it was detected, every error with field, expected, found and spec_ref naming package, version, schema and field path, whether the network is valid CAIP-2, whether the asset is a known and canonical token address or a bridged variant, whether the declared inputSch
# 1. Ask the endpoint what it costs (no payment, no wallet needed): curl -i -X GET 'https://x402.halowerk.com/offer/validate' # -> HTTP/1.1 402 Payment Required # the response carries the price, asset and pay-to address. # 2. Pay and retry with any x402 client: npx x402-fetch 'https://x402.halowerk.com/offer/validate'
Endpoint: https://x402.halowerk.com/offer/validate. Operated by x402.halowerk.com, not by Animica. Price and availability were correct at the last probe on 2026-09-02 and are set by the operator, who may change them.
Reads the public x402 Bazaar catalogue and finds offers comparable to yours, either from a resource_url whose 402 challenge is fetched without paying, or from a…
Checks vouchers of a payment channel by computation only - nothing is ever claimed, redeemed or refunded. Signatures are verified cryptographically against the …
Asks every known facilitator what it supports and measures how long that answer takes. Reachability, supported chains, supported assets, supported schemes and t…
A stateful duplicate check for agents that settle x402 payments. Supply any of payment_id, payload_hash and nonce; each is hashed with SHA-256 before storage, s…
Fetches the 402 challenge of a foreign endpoint without paying anything — no payment header, no signature, no settlement — or parses a challenge you already hol…
A stateless rule check for agents that pay for x402 endpoints. You supply the proposed payment, your policy and the amounts already spent this hour and this day…
Cryptographic verification of the offer-receipt extension of x402. Accepts a signed offer in eip712, jws or eip191 form — either bundled as {format, payload, si…
Reads all incoming ERC-20 transfers of one token to one address within a block or time window and matches them against the receipts you supply. Matching runs fi…
Takes what the caller holds and what the seller accepts and works out which combinations can settle the amount. All costs are brought into USD, otherwise no com…
Reads the receipt of a transaction on Ethereum, Base, Base Sepolia, OP Mainnet, Arbitrum One, Polygon PoS or Avalanche C-Chain and compares it with what you exp…