AlgoVoi Payable Rail

Tenant-free metered signed-verification rail. Pay per call in USDC over x402/a2a/mpp/ap2 across 12 mainnet lanes: mined-tx lanes weld the challenge into the tx note/memo/reference (NOT EIP-3009); EVM EIP-3009 lanes accept stock signed authorizations. No API key, payment is the auth. Every response carries an offline-verifiable Ed25519 receipt.

Skills

• Verify payment/settlement receipt
  Tenant-free metered x402 service: no API key, payment is the auth (USDC on every enabled mainnet lane: mined-tx lanes weld the challenge into the tx note/memo/reference; EVM EIP-3009 lanes accept stock signed authorizations). Verify an x402/AP2 settlement attestation or signed receipt (JWS) offline against the platform JWKS and return a signed verification receipt. Price $0.01 USDC per call; returns an offline-verifiable Ed25519 receipt binding settled_payment_ref -> request_hash -> response_hash.
  x402paymentsverificationalgorandreceipts
• Verify RFC 9421 HTTP message signature
  Tenant-free metered x402 service: no API key, payment is the auth (USDC on every enabled mainnet lane: mined-tx lanes weld the challenge into the tx note/memo/reference; EVM EIP-3009 lanes accept stock signed authorizations). Verify an RFC 9421 HTTP message signature (Signature-Input / Signature / Content-Digest) against a supplied public key and return a signed verification receipt. Price $0.01 USDC per call; returns an offline-verifiable Ed25519 receipt binding settled_payment_ref -> request_hash -> response_hash.
  x402paymentsverificationalgorandreceipts
• Signed compliance receipt
  Tenant-free metered x402 service: no API key, payment is the auth (USDC on every enabled mainnet lane: mined-tx lanes weld the challenge into the tx note/memo/reference; EVM EIP-3009 lanes accept stock signed authorizations). Produce a signed compliance/sanctions-screening receipt for a counterparty payment (wave 2, not yet enabled). Not yet enabled (wave 2).
  x402paymentsverificationalgorandreceipts
• Screen a URL for safety
  Tenant-free metered x402 service: no API key, payment is the auth (USDC on every enabled mainnet lane: mined-tx lanes weld the challenge into the tx note/memo/reference; EVM EIP-3009 lanes accept stock signed authorizations). Screen a URL before an agent fetches or acts on it (SSRF / private-network / cloud-metadata host / homograph / bad-TLD / TLS checks) and return the allow/escalate/block verdict plus a signed, offline-verifiable receipt attesting the screen. Pay-tier structural safety check; full compliance/sanctions screening is a tenant-grade service. Price $0.01 USDC per call; returns an offline-verifiable Ed25519 receipt binding settled_payment_ref -> request_hash -> response_hash.
  x402paymentsverificationalgorandreceipts
• Chain-agnostic payment-lane negotiation
  Chain-agnostic capability match. POST {chains:[...], protocols:[...], service_id?} to /pay/v1/negotiate with the chains and protocols you support (CAIP-2 ids, plain names, or hyphen/underscore forms) and get back the lanes you share with the rail plus a recommended pick. GET /pay/v1/negotiate returns the full capability set. Unauthenticated and read-only: mints no token, changes no state, settles nothing; the payment happens afterward via the chosen lane's 402. Response fields: negotiated, common_lanes, common_protocols, recommended, next.
  negotiationchain-agnosticcaip-2interoperabilityx402a2amppap2discovery

How to call

https://pay.algovoi.co.uk/a2a

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