D20DAO Verifiable Randomness API

Verifiable random numbers for agents: dice, coin flips, ranges, choices, shuffles and raw 256-bit words,
proven on chain by D20DAO VRF on Arc. 0.05 USDC per call over x402, settled through Circle Gateway.

POST https://api.d20dao.org/v1/random              paid: draw (402 without payment)
GET  https://api.d20dao.org/v1/payments/{id}       free: status and result of a paid call
GET  https://api.d20dao.org/v1/random/{id}         free: read a request
GET  https://api.d20dao.org/openapi.json           OpenAPI 3.1 with schemas and agent guidance

Docs: https://d20dao.org/docs
Verification: https://d20dao.org/docs/verification
Contact: contact@d20dao.org