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Leave it empty and search by intervention, sponsor, location or term instead - nothing is added to your search that you did not ask for. A term the registry does not recognise returns zero studies rather than an error, so a typo looks exactly like a disease nobody studies; that empty result is returned as its own row saying so." }, "intervention": { "title": "Intervention or drug", "type": "string", "description": "A drug, device or procedure, such as metformin, semaglutide or CAR-T.", "default": "" }, "term": { "title": "Other search term", "type": "string", "description": "Free text searched across the whole record - useful for a technique or gene name that is neither a condition nor an intervention, such as CRISPR.", "default": "" }, "location": { "title": "Location", "type": "string", "description": "A country, state or city where the study has a site, such as Japan, California or Berlin.", "default": "" }, "sponsor": { "title": "Sponsor", "type": "string", "description": "The organisation running the study, such as Pfizer, NIH or Mayo Clinic. The lead sponsor and its class (industry, NIH, other) come back on every row.", "default": "" }, "statuses": { "title": "Recruitment status", "type": "array", "description": "Keep only studies in these statuses. An invalid value is rejected by the registry with HTTP 400 and the reason, rather than being ignored.", "items": { "type": "string", "enum": [ "RECRUITING", "NOT_YET_RECRUITING", "ACTIVE_NOT_RECRUITING", "ENROLLING_BY_INVITATION", "COMPLETED", "SUSPENDED", "TERMINATED", "WITHDRAWN", "UNKNOWN" ], "enumTitles": [ "Recruiting", "Not yet recruiting", "Active, not recruiting", "Enrolling by invitation", "Completed", "Suspended", "Terminated", "Withdrawn", "Unknown status" ] }, "default": [] }, "phases": { "title": "Trial phase", "type": "array", "description": "Keep only these phases. Observational studies have no phase at all and come back with an empty list rather than a made-up value, so filtering by phase excludes them.", "items": { "type": "string", "enum": [ "0", "1", "2", "3", "4" ], "enumTitles": [ "Early Phase 1", "Phase 1", "Phase 2", "Phase 3", "Phase 4" ] }, "default": [] }, "studyType": { "title": "Study type", "enum": [ "", "int", "obs" ], "type": "string", "description": "int = interventional (a trial that gives a treatment), obs = observational (a study that watches without intervening). Leave empty for both.", "default": "" }, "maxStudies": { "title": "Maximum studies", "minimum": 1, "maximum": 20000, "type": "integer", "description": "How many studies to return. You are charged for the rows you actually receive. The registry holds over 600,000 studies and a broad condition can match tens of thousands - cancer matched 123,154 when this was built - so this limit is what keeps a run affordable.", "default": 200 }, "maxRetries": { "title": "Attempts per request", "minimum": 1, "maximum": 6, "type": "integer", "description": "How many times to try a request in total when the registry does not answer. HTTP 400 is a permanent answer and is never retried.", "default": 4 } } }, "runsResponseSchema": { "type": "object", "properties": { "data": { "type": "object", "properties": { "id": { "type": "string" }, "actId": { "type": "string" }, "userId": { "type": "string" }, "startedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "finishedAt": { "type": "string", "format": "date-time", "example": "2025-01-08T00:00:00.000Z" }, "status": { "type": "string", "example": "READY" }, "meta": { "type": "object", "properties": { "origin": { "type": "string", "example": "API" }, "userAgent": { "type": "string" } } }, "stats": { "type": "object", "properties": { "inputBodyLen": { "type": "integer", "example": 2000 }, "rebootCount": { "type": "integer", "example": 0 }, "restartCount": { "type": "integer", "example": 0 }, "resurrectCount": { "type": "integer", "example": 0 }, "computeUnits": { "type": "integer", "example": 0 } } }, "options": { "type": "object", "properties": { "build": { "type": "string", "example": "latest" }, "timeoutSecs": { "type": "integer", "example": 300 }, "memoryMbytes": { "type": "integer", "example": 1024 }, "diskMbytes": { "type": "integer", "example": 2048 } } }, "buildId": { "type": "string" }, "defaultKeyValueStoreId": { "type": "string" }, "defaultDatasetId": { "type": "string" }, "defaultRequestQueueId": { "type": "string" }, "buildNumber": { "type": "string", "example": "1.0.0" }, "containerUrl": { "type": "string" }, "usage": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "integer", "example": 1 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } }, "usageTotalUsd": { "type": "number", "example": 0.00005 }, "usageUsd": { "type": "object", "properties": { "ACTOR_COMPUTE_UNITS": { "type": "integer", "example": 0 }, "DATASET_READS": { "type": "integer", "example": 0 }, "DATASET_WRITES": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_READS": { "type": "integer", "example": 0 }, "KEY_VALUE_STORE_WRITES": { "type": "number", "example": 0.00005 }, "KEY_VALUE_STORE_LISTS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_READS": { "type": "integer", "example": 0 }, "REQUEST_QUEUE_WRITES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_INTERNAL_GBYTES": { "type": "integer", "example": 0 }, "DATA_TRANSFER_EXTERNAL_GBYTES": { "type": "integer", "example": 0 }, "PROXY_RESIDENTIAL_TRANSFER_GBYTES": { "type": "integer", "example": 0 }, "PROXY_SERPS": { "type": "integer", "example": 0 } } } } } } } } } }