{"name":"x402 Dev Tools","description":"Developer tools for x402, paid per call in USDC on Base: decode and explain PAYMENT-REQUIRED, PAYMENT-SIGNATURE and PAYMENT-RESPONSE headers, encode them, build a correct 402 for a USDC price, look up networks with their USDC contracts and EIP-712 domains, check facilitators live, generate OpenAPI, /.well-known/x402 and llms.txt, and lint a seller's whole origin.","price":"$0.002","networks":["eip155:8453"],"endpoints":{"POST /v1/decode":"paid ($0.002 USDC): Decode and explain an x402 payment header","POST /v1/encode":"paid ($0.002 USDC): Encode an x402 header value from JSON, and check it","POST /v1/requirements":"paid ($0.002 USDC): Build a correct 402 PaymentRequired for a USDC price","GET /v1/networks":"paid ($0.002 USDC): Networks x402 pays on, with USDC addresses and EIP-712 domains","GET /v1/facilitators":"paid ($0.003 USDC): Live status of x402 facilitators and the networks they support","POST /v1/discovery":"paid ($0.003 USDC): Generate OpenAPI, /.well-known/x402 and llms.txt for an x402 API","GET /v1/lint":"paid ($0.01 USDC): Lint an x402 seller's origin: discovery documents and every 402"},"openapi":"/openapi.json","llms":"/llms.txt"}