{"uid":"cap_4RDUIRF2_m00H53hVBHuR","slug":"clinical-trial-search-6ab365e9","name":"Clinical Trial Search","description":"Clinical trial search — find ClinicalTrials.gov studies by free text, condition, intervention, sponsor, recruitment status and phase, and get each study's NCT id, titles, status, phases, conditions, interventions, sponsor, start and completion dates, enrollment and whether results are posted. Use for drug development, medical research and patient-recruitment questions.","url":"https://clinical-trials.use.x402atlas.com/search?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":["query"],"properties":{"limit":{"type":"integer","default":10,"maximum":50,"minimum":1},"phase":{"enum":["early1","1","2","3","4","na"],"type":"string","description":"early1 = early phase 1; na = not applicable"},"query":{"type":"string","maxLength":200,"description":"Free-text search over all study fields"},"status":{"type":"string","maxLength":200,"description":"Comma-separated, up to 5 of: recruiting, not_yet_recruiting, active_not_recruiting, enrolling_by_invitation, completed, suspended, terminated, withdrawn, available, no_longer_available, temporarily_not_available, approved_for_marketing, withheld, unknown"},"sponsor":{"type":"string","maxLength":200,"description":"Lead sponsor name filter"},"condition":{"type":"string","maxLength":200,"description":"Condition or disease filter"},"page_token":{"type":"string","maxLength":512,"description":"next_page_token of the previous page"},"intervention":{"type":"string","maxLength":200,"description":"Intervention or treatment filter"}},"additionalProperties":false}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string"},"example":{"type":"object","required":["as_of","source","caveat","modified","query","condition","intervention","sponsor","status","phase","count","total","studies","next_page_token"],"properties":{"note":{"type":"string","description":"Present only on a sample or empty response"},"as_of":{"type":"string","format":"date-time","description":"Retrieval time, UTC"},"count":{"type":"integer","description":"Studies on this page"},"phase":{"type":"string","description":"Applied phase filter; empty when none"},"query":{"type":"string"},"total":{"type":"integer","description":"Studies matching across all pages"},"caveat":{"type":"string","description":"Fixed interpretation note"},"source":{"type":"object","required":["name","url","citation"],"properties":{"url":{"type":"string"},"name":{"type":"string"},"citation":{"type":"string","description":"Attribution requested by the registry"}},"additionalProperties":false},"status":{"type":"array","items":{"type":"string"},"description":"Applied status filter"},"sponsor":{"type":"string","description":"Applied filter; empty when none"},"studies":{"type":"array","items":{"type":"object"},"description":"Study summaries: nct_id, title, official_title, status (lowercase registry status), study_type, phases[] (early1|1|2|3|4|na), conditions[], interventions[] {type, name}, lead_sponsor, start_date/primary_completion_date/completion_date {date, precision: day|month|year, type?} (absent when not reported), enrollment {count, type}, has_results, url"},"modified":{"type":"boolean","description":"Always true: fields are normalized, not the registry's verbatim record"},"condition":{"type":"string","description":"Applied filter; empty when none"},"intervention":{"type":"string","description":"Applied filter; empty when none"},"next_page_token":{"type":"string","description":"Pass as page_token for the next page; empty on the last page"}},"additionalProperties":false}}}}},"responseSchema":null,"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_14VSQ2qEHpfkIUPdCnV23","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":"Search ClinicalTrials.gov studies by free text, condition, intervention, sponsor, status, and phase, returning structured study metadata.","exampleAgentPrompt":"Can you find recruiting Phase 3 clinical trials for type 2 diabetes testing semaglutide, sponsored by Novo Nordisk? Show me up to 20 results.","exampleUseCases":[{"title":"Patient recruitment for rare disease","prompt":"Find all currently recruiting clinical trials for Duchenne muscular dystrophy — I need the trial names, NCT IDs, phases, and enrollment numbers to help identify options for a patient."},{"title":"Pharma competitive intelligence","prompt":"Search for Phase 2 and Phase 3 trials testing checkpoint inhibitors for non-small cell lung cancer sponsored by Merck, and show me their status and completion dates."},{"title":"Drug development landscape research","prompt":"What completed clinical trials with posted results exist for CRISPR gene therapy interventions? Give me up to 50 studies so I can map the development landscape."}],"resultDescription":"Returns a paginated list of matching ClinicalTrials.gov studies, each with NCT ID, official and brief titles, recruitment status, phases, conditions, interventions, lead sponsor, start and primary completion dates, enrollment count, and whether results have been posted. Also includes applied filter echoes, total match count, retrieval timestamp, and a next_page_token for pagination.","failureModes":["Empty result set when query terms are too specific or misspelled — returns count:0 with no studies","Invalid status value in comma-separated list returns a 400-level error","Phase enum value not matching allowed options (early1, 1, 2, 3, 4, na) causes request rejection","Exceeding limit maximum of 50 or providing a malformed page_token causes schema validation failure","ClinicalTrials.gov upstream unavailability may cause timeouts or empty responses"],"whenToPreferThis":"Use this endpoint when you need to search or discover clinical trials from ClinicalTrials.gov by flexible free-text or structured filters (condition, drug, sponsor, phase, status). Prefer it over the sibling 'Clinical Trial Updates' endpoint when you want broad discovery rather than a feed of recently changed studies. It is ideal for drug development research, patient recruitment use cases, competitive intelligence, and literature review tasks that require structured trial metadata.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-29T13:08:16.342Z","isFirstParty":false,"canonicalSlug":"clinical-trial-search-6ab365e9"}