Pay-per-call Verifiable Random Tools API on x402 Atlas — billed per request in USDC over the x402 protocol.
Paid endpoints use the x402 payment protocol: request a route with no payment to receive a 402 challenge, then re-send with a PAYMENT-SIGNATURE header (an x402 SDK does this for you). Payment options and their networks are authoritative in that challenge.
402
PAYMENT-SIGNATURE
This bridge's machine-readable spec — schemas, examples, and per-route prices — is at openapi.json. Its agent-readable corpus is at llms.txt.