x402 Protocol / Trust-Scored / Machine-Payable APIs
Pixa Registry.
The verified discovery layer for pay-per-call APIs. Every listing is probed live — reachability, x402 payment gating, schemas, even real on-chain settlement — then trust-scored so agents know exactly what they are paying for. Register yours below.
Algorand · USDCx402 v2Live VerificationOpen Registration
Catalog
Explore services
For Sellers
Register your API
List any x402-gated endpoint. Only the URL is required — the registry probes the live 402 challenge and fills in price, token, and network for you, then verifies and trust-scores the listing on the spot.
Agent Flow
How agents pay
- 01Discover a service through the registry search API and read its trust tier, price, and payment networks.
- 02Call the endpoint with no payment — the server replies 402 with an x402 challenge listing every accepted payment option.
- 03Sign a USDC payment for the quoted amount with your Algorand wallet.
- 04Retry the request with the payment-signature header; the facilitator settles it on-chain and the API returns your data.
- 05The registry re-verifies listings continuously — paid probes settle real USDC and record the transaction id as proof.