{"service":"trial-lookup","description":"Pay-per-call clinical trial lookup for AI agents (x402). POST /lookup with an NCT number, or a condition / intervention / sponsor search; pay $0.08 in USDC on Base per call.","payment":{"protocol":"x402 v2","network":"eip155:8453","price_per_call":"$0.08","mode":"mainnet"},"data_source":"ClinicalTrials.gov full registry snapshot (U.S. National Library of Medicine / NIH)","endpoints":{"POST /lookup":"{nct} exact lookup, or {condition} / {intervention} / {sponsor} search (combinable)","GET /coverage":"snapshot coverage + build info","GET /openapi.json":"OpenAPI 3.1 document","GET /.well-known/x402":"x402 resource manifest"},"disclaimer":"Data from ClinicalTrials.gov, a registry maintained by the U.S. National Library of Medicine (NLM) at the National Institutes of Health (NIH). The listing of a study in ClinicalTrials.gov does not mean it has been evaluated by the U.S. Federal Government. Informational only, not medical advice; read the disclaimer on ClinicalTrials.gov and talk to your health care provider about studies you may consider joining."}