{"uid":"cap_jSOPVs6QcGMiZqtaTAc24","slug":"clinicaltrials-gov-studies-search-api-ea01d6c9","name":"ClinicalTrials.gov Studies Search API","description":"Paid public-data feeds. Unpaid requests return HTTP 402. Prices are USDC on Base.","url":"https://project-api-gamma-sable.vercel.app/paid/clinicaltrials/studies?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["term"],"properties":{"term":{"type":"string","description":"Search term"},"limit":{"type":"string","description":"Max results"},"pageToken":{"type":"string","description":"Query param: pageToken"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object"}}}}},"responseSchema":{"type":"json","example":{"what":"ClinicalTrials.gov studies search (slim JSON + uiLink)","items":[],"source":"/paid/clinicaltrials/studies"}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_eJLnLQ9sfH16TwgUZIMsl","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Searches ClinicalTrials.gov for clinical studies matching a keyword term, returning slim JSON results with UI links, paid via USDC on Base.","exampleAgentPrompt":"Search ClinicalTrials.gov for studies on type 2 diabetes and return up to 10 results.","exampleUseCases":[{"title":"Patient finding relevant trials","prompt":"Can you search ClinicalTrials.gov for clinical studies on Alzheimer's disease and show me up to 20 results?"},{"title":"Researcher tracking drug studies","prompt":"Find all ClinicalTrials.gov studies related to mRNA vaccines and give me the first page of results."},{"title":"Rare disease advocacy lookup","prompt":"Search for clinical trials on Duchenne muscular dystrophy — I need up to 5 studies with links to their ClinicalTrials.gov pages."}],"resultDescription":"Returns a slim JSON array of matching ClinicalTrials.gov study records for the given search term, including basic study metadata and a direct UI link to each study on ClinicalTrials.gov. Supports pagination via a page token.","failureModes":["HTTP 402 if payment is not provided or fails — requires USDC on Base via x402 protocol","Empty items array if no studies match the search term","Missing or invalid 'term' query parameter returns an error","Invalid pageToken may return empty or incorrect page of results","Network or upstream ClinicalTrials.gov API unavailability"],"whenToPreferThis":"Choose this endpoint when you need programmatic, pay-per-query access to ClinicalTrials.gov study data without setting up your own API integration, especially in agent workflows where microtransaction payments via USDC on Base are already supported. Prefer this over direct ClinicalTrials.gov API calls when you want a simplified, slim JSON response with UI links and don't need the full raw API payload.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-11T00:41:32.621Z","isFirstParty":false,"canonicalSlug":"clinicaltrials-gov-studies-search-api-ea01d6c9"}