AlgoVoi Pay
A hosted, tenant-free, chain-agnostic pay-per-call verification rail for AI agents. Pay per request over x402 in USDC, no account and no API key: the payment is the authentication. Every response returns an offline-verifiable Ed25519 receipt.
Algorand
Base
Monad
Polygon
Arbitrum
OP Mainnet
Arc
Solana
Stellar
Hedera
Voi
Tempo
Live skills (0.01 USDC per call)
Verify a payment receipt
Check an x402 / AP2 payment receipt and get a countersigned payable receipt back.
Verify an RFC 9421 signature
Verify an HTTP Message Signature (RFC 9421) and get a signed receipt.
Chain-agnostic negotiation
USDC across twelve mainnet chains: Algorand, Base, Monad, Polygon, Arbitrum, OP Mainnet, Arc, Solana, Stellar, Hedera, Voi and Tempo. Arc is Circle's USDC-native L1, live since 16 September 2026. POST {chains, protocols} to /pay/v1/negotiate to get the lanes you share with the rail (across x402, AP2, A2A and MPP) and a recommended pick, before any payment moves. Read-only.