Search recruiting US clinical trials by city, condition, phase and patient eligibility.
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Return only the count of active US clinical trials matching the same filter set accepted by clinicaltrials_search_trials. Use this when the caller needs a population estimate (e.g. 'how many trials are recruiting in California for type 2 diabetes?') without fetching trial records. Far cheaper than calling search and discarding the results.
Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead.
Age bucket for eligibility matching. 'child' = 0-17 years, 'adult' = 18-64 years, 'senior' = 65+ years. Maps to AACT minimum_age/maximum_age boundaries server-side.
Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter.
US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: "San Francisco", "St. Louis", "O'Fallon", "Wilkes-Barre". Surrounding whitespace is trimmed; maximum 100 characters.
Exact facility name match. Scopes results to trials running at this named site.
Condition to filter by: a curated slug ('breast-cancer'), its label ('Breast Cancer') or a condition name as it appears in trial records ('Breast Neoplasms'). Case-insensitive. Call clinicaltrials_list_conditions to see the valid values; an unrecognized condition is rejected with suggestions, never ignored.
Return only the count of active US clinical trials matching the same filter set accepted by clinicaltrials_search_trials. Use this when the caller needs a population estimate (e.g. 'how many trials are recruiting in California for type 2 diabetes?') without fetching trial records. Far cheaper than calling search and discarding the results.
| Argument | Type | Description |
|---|---|---|
| age | string | Age bucket for eligibility matching. 'child' = 0-17 years, 'adult' = 18-64 years, 'senior' = 65+ years. Maps to AACT minimum_age/maximum_age boundaries server-side. |
| sex | string | Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter. |
| city | string | US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: "San Francisco", "St. Louis", "O'Fallon", "Wilkes-Barre". Surrounding whitespace is trimmed; maximum 100 characters. |
| phase | array | |
| state* | string | Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead. |
| status | array | |
| facility | string | Exact facility name match. Scopes results to trials running at this named site. |
| condition | string | Condition to filter by: a curated slug ('breast-cancer'), its label ('Breast Cancer') or a condition name as it appears in trial records ('Breast Neoplasms'). Case-insensitive. Call clinicaltrials_list_conditions to see the valid values; an unrecognized condition is rejected with suggestions, never ignored. |
| studyType | array | |
| interventionType | array | |
| healthyVolunteersOnly | boolean |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"state"
],
"properties": {
"age": {
"enum": [
"child",
"adult",
"senior"
],
"type": "string",
"description": "Age bucket for eligibility matching. 'child' = 0-17 years, 'adult' = 18-64 years, 'senior' = 65+ years. Maps to AACT minimum_age/maximum_age boundaries server-side."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter."
},
"city": {
"type": "string",
"description": "US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: \"San Francisco\", \"St. Louis\", \"O'Fallon\", \"Wilkes-Barre\". Surrounding whitespace is trimmed; maximum 100 characters."
},
"phase": {
"type": "array",
"items": {
"enum": [
"Phase 1",
"Phase 2",
"Phase 3",
"Phase 4",
"N/A",
"EARLY_PHASE1",
"PHASE1",
"PHASE2",
"PHASE3",
"PHASE4",
"NA"
],
"type": "string",
"description": "Trial phase. One of: \"Phase 1\", \"Phase 2\", \"Phase 3\", \"Phase 4\", \"N/A\" - or the raw value a trial record reports (\"PHASE1\", \"EARLY_PHASE1\", \"PHASE2\", \"PHASE3\", \"PHASE4\", \"NA\"). Combined-phase trials (e.g. Phase 1/Phase 2) surface under each component bucket, so a Phase 1 filter also matches a Phase 1/Phase 2 study."
},
"maxItems": 10
},
"state": {
"type": "string",
"description": "Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead."
},
"status": {
"type": "array",
"items": {
"enum": [
"RECRUITING",
"NOT_YET_RECRUITING",
"ENROLLING_BY_INVITATION"
],
"type": "string",
"description": "Recruitment status. One of: \"RECRUITING\", \"NOT_YET_RECRUITING\", \"ENROLLING_BY_INVITATION\". The MCP server only exposes the three active statuses - completed, terminated, withdrawn, etc. are not searchable."
},
"maxItems": 3
},
"facility": {
"type": "string",
"maxLength": 200,
"minLength": 1,
"description": "Exact facility name match. Scopes results to trials running at this named site."
},
"condition": {
"type": "string",
"maxLength": 120,
"minLength": 1,
"description": "Condition to filter by: a curated slug ('breast-cancer'), its label ('Breast Cancer') or a condition name as it appears in trial records ('Breast Neoplasms'). Case-insensitive. Call clinicaltrials_list_conditions to see the valid values; an unrecognized condition is rejected with suggestions, never ignored."
},
"studyType": {
"type": "array",
"items": {
"enum": [
"INTERVENTIONAL",
"OBSERVATIONAL",
"EXPANDED_ACCESS"
],
"type": "string",
"description": "Trial study type from ClinicalTrials.gov. One of: \"INTERVENTIONAL\", \"OBSERVATIONAL\", \"EXPANDED_ACCESS\". Values match AACT's canonical enum exactly (uppercase)."
},
"maxItems": 3
},
"interventionType": {
"type": "array",
"items": {
"enum": [
"DRUG",
"DEVICE",
"BEHAVIORAL",
"PROCEDURE",
"BIOLOGICAL",
"DIAGNOSTIC_TEST",
"DIETARY_SUPPLEMENT",
"RADIATION",
"COMBINATION_PRODUCT",
"GENETIC",
"OTHER"
],
"type": "string",
"description": "Intervention type. One of: \"DRUG\", \"DEVICE\", \"BEHAVIORAL\", \"PROCEDURE\", \"BIOLOGICAL\", \"DIAGNOSTIC_TEST\", \"DIETARY_SUPPLEMENT\", \"RADIATION\", \"COMBINATION_PRODUCT\", \"GENETIC\", \"OTHER\". Values match AACT's canonical enum exactly (uppercase)."
},
"maxItems": 11
},
"healthyVolunteersOnly": {
"type": "boolean"
}
}
}Match patient demographics (age, sex, conditions, location) to currently recruiting US clinical trials. Conditions are curated slugs, labels or trial-record condition names (discover them via clinicaltrials_list_conditions). Maps ageYears to the AACT eligibility bucket (child 0-17, adult 18-64, senior 65+). Returns up to 50 trials per page with an opaque cursor for further pagination. State scope is required; city is optional for facility-level narrowing.
| Argument | Type | Description |
|---|---|---|
| sex | string | Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter. |
| city | string | US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: "San Francisco", "St. Louis", "O'Fallon", "Wilkes-Barre". Surrounding whitespace is trimmed; maximum 100 characters. |
| state* | string | Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead. |
| cursor | string | Opaque pagination cursor returned by a previous call's nextCursor field. Omit to start from the beginning of the result set. Cursors are tied to the exact filter set used to issue them - reusing a cursor with different filters returns an invalid_cursor error. |
| ageYears* | integer |
Returns the timestamp at which the underlying ClinicalTrials.gov dataset was last refreshed on the server. Use this to disclose the data age to end users or to decide whether to re-query for fresher results.
No arguments.
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {}
}Fetch the full clinical trial record by NCT ID. Returns title, status, sponsor, summary, conditions, interventions, arms, design, eligibility (age, sex, healthy volunteers and the full inclusion/exclusion criteria text), primary outcomes, central contacts, every US site location with its contacts, and links to the trial's Hipa.ai page and ClinicalTrials.gov record. Use this after clinicaltrials_search_trials surfaces a candidate NCT id and the caller needs the complete record - the search tool only returns a paginated summary.
| Argument | Type | Description |
|---|---|---|
| nctId* | string | ClinicalTrials.gov identifier. Canonical form: 'NCT' followed by exactly 8 digits (e.g. NCT12345678). Case-insensitive on input; normalized to uppercase. Surrounding whitespace is trimmed. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"nctId"
],
"properties": {
"nctId": {
"type": "string",
"description": "ClinicalTrials.gov identifier. Canonical form: 'NCT' followed by exactly 8 digits (e.g. NCT12345678). Case-insensitive on input; normalized to uppercase. Surrounding whitespace is trimmed."
}
}
}List the curated conditions the trial search tools filter on, with the slug to pass as `condition` (clinicaltrials_search_trials, clinicaltrials_count_trials) or in `conditions` (clinicaltrials_find_eligible_trials). Pass `query` to find a condition by name or synonym (e.g. 'lung', 'diabetes', 'NSCLC'). Ordered by how many recruiting US trials study the condition. Specialty entries (e.g. 'oncology') are roll-ups covering many conditions.
| Argument | Type | Description |
|---|---|---|
| limit | integer | Maximum conditions to return. Integer in [1, 250]. Default 50. |
| query | string | Case-insensitive search over condition labels, slugs and synonyms (the raw condition names trial records use). Omit to list the most common conditions. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"properties": {
"limit": {
"type": "integer",
"default": 50,
"maximum": 250,
"minimum": 1,
"description": "Maximum conditions to return. Integer in [1, 250]. Default 50."
},
"query": {
"type": "string",
"maxLength": 100,
"description": "Case-insensitive search over condition labels, slugs and synonyms (the raw condition names trial records use). Omit to list the most common conditions."
}
}
}List the most common conditions across active US clinical trials in a US state or city, with trial counts. Use this when the caller wants to see what is well-represented in a region before searching. Each entry carries the curated `slug` to pass to clinicaltrials_search_trials as `condition` (null when the label has no curated match - use clinicaltrials_list_conditions to find a close one). Counts come from AACT condition aggregations and refresh daily.
| Argument | Type | Description |
|---|---|---|
| city | string | US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: "San Francisco", "St. Louis", "O'Fallon", "Wilkes-Barre". Surrounding whitespace is trimmed; maximum 100 characters. |
| limit | integer | Maximum number of buckets to return from a top-N aggregation. Integer in [1, 25]. Default 10. Aggregator returns buckets sorted by descending count. |
| state* | string | Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"state"
],
"properties": {
"city": {
"type": "string",
"description": "US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: \"San Francisco\", \"St. Louis\", \"O'Fallon\", \"Wilkes-Barre\". Surrounding whitespace is trimmed; maximum 100 characters."
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 25,
"minimum": 1,
"description": "Maximum number of buckets to return from a top-N aggregation. Integer in [1, 25]. Default 10. Aggregator returns buckets sorted by descending count."
},
"state": {
"type": "string",
"description": "Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead."
}
}
}List named research facilities running active US clinical trials in a city, ranked by trial count. Returns each facility's name, ZIP, the top conditions they study, and one example NCT ID for quick verification. Use this when the caller asks where studies are happening in a specific city, or wants to surface named local clinics for a downstream clinicaltrials_search_trials call with the facility filter.
| Argument | Type | Description |
|---|---|---|
| city* | string | US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: "San Francisco", "St. Louis", "O'Fallon", "Wilkes-Barre". Surrounding whitespace is trimmed; maximum 100 characters. |
| limit | integer | Maximum number of buckets to return from a top-N aggregation. Integer in [1, 25]. Default 10. Aggregator returns buckets sorted by descending count. |
| state* | string | Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"state",
"city"
],
"properties": {
"city": {
"type": "string",
"description": "US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: \"San Francisco\", \"St. Louis\", \"O'Fallon\", \"Wilkes-Barre\". Surrounding whitespace is trimmed; maximum 100 characters."
},
"limit": {
"type": "integer",
"default": 10,
"maximum": 25,
"minimum": 1,
"description": "Maximum number of buckets to return from a top-N aggregation. Integer in [1, 25]. Default 10. Aggregator returns buckets sorted by descending count."
},
"state": {
"type": "string",
"description": "Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead."
}
}
}Search active US clinical trials by location, condition slug, phase, study type, intervention type, recruitment status, sex eligibility, age bucket, healthy-volunteer flag, and facility name. Returns up to 50 trials per page with an opaque cursor for further pagination. Cursors are tied to the exact filter set used to issue them - reusing a cursor with a different filter set returns invalid_cursor. Use state-only scope first when exploring a region, then narrow to city for facility-level detail.
| Argument | Type | Description |
|---|---|---|
| age | string | Age bucket for eligibility matching. 'child' = 0-17 years, 'adult' = 18-64 years, 'senior' = 65+ years. Maps to AACT minimum_age/maximum_age boundaries server-side. |
| sex | string | Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter. |
| city | string | US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: "San Francisco", "St. Louis", "O'Fallon", "Wilkes-Barre". Surrounding whitespace is trimmed; maximum 100 characters. |
| phase | array | |
| state* | string | Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead. |
| cursor |
| Patient age in years. Integer in [0, 120]. Maps to the AACT eligibility bucket: 0-17 child, 18-64 adult, 65+ senior. |
| pageSize | integer | Number of results per page. Integer in [1, 50]. Default 20. |
| conditions* | array | One or more conditions. Unrecognized values are rejected as invalid_input with suggested slugs. |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"ageYears",
"conditions",
"state"
],
"properties": {
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter."
},
"city": {
"type": "string",
"description": "US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: \"San Francisco\", \"St. Louis\", \"O'Fallon\", \"Wilkes-Barre\". Surrounding whitespace is trimmed; maximum 100 characters."
},
"state": {
"type": "string",
"description": "Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead."
},
"cursor": {
"type": "string",
"minLength": 1,
"description": "Opaque pagination cursor returned by a previous call's nextCursor field. Omit to start from the beginning of the result set. Cursors are tied to the exact filter set used to issue them - reusing a cursor with different filters returns an invalid_cursor error."
},
"ageYears": {
"type": "integer",
"maximum": 120,
"minimum": 0,
"description": "Patient age in years. Integer in [0, 120]. Maps to the AACT eligibility bucket: 0-17 child, 18-64 adult, 65+ senior."
},
"pageSize": {
"type": "integer",
"default": 20,
"maximum": 50,
"minimum": 1,
"description": "Number of results per page. Integer in [1, 50]. Default 20."
},
"conditions": {
"type": "array",
"items": {
"type": "string",
"maxLength": 120,
"minLength": 1,
"description": "Condition slug ('breast-cancer'), label ('Breast Cancer') or trial-record condition name ('Breast Neoplasms'). Case-insensitive. Discover valid values via clinicaltrials_list_conditions."
},
"minItems": 1,
"description": "One or more conditions. Unrecognized values are rejected as invalid_input with suggested slugs."
}
}
}| string |
| Opaque pagination cursor returned by a previous call's nextCursor field. Omit to start from the beginning of the result set. Cursors are tied to the exact filter set used to issue them - reusing a cursor with different filters returns an invalid_cursor error. |
| status | array |
| facility | string | Exact facility name match. Scopes results to trials running at this named site. |
| pageSize | integer | Number of results per page. Integer in [1, 50]. Default 20. |
| condition | string | Condition to filter by: a curated slug ('breast-cancer'), its label ('Breast Cancer') or a condition name as it appears in trial records ('Breast Neoplasms'). Case-insensitive. Call clinicaltrials_list_conditions to see the valid values; an unrecognized condition is rejected with suggestions, never ignored. |
| studyType | array |
| interventionType | array |
| healthyVolunteersOnly | boolean |
{
"type": "object",
"$schema": "http://json-schema.org/draft-07/schema#",
"required": [
"state"
],
"properties": {
"age": {
"enum": [
"child",
"adult",
"senior"
],
"type": "string",
"description": "Age bucket for eligibility matching. 'child' = 0-17 years, 'adult' = 18-64 years, 'senior' = 65+ years. Maps to AACT minimum_age/maximum_age boundaries server-side."
},
"sex": {
"enum": [
"female",
"male"
],
"type": "string",
"description": "Biological sex eligibility filter. Use 'female' or 'male'. Trials open to both sexes are returned regardless of this filter."
},
"city": {
"type": "string",
"description": "US city name. Allows letters, spaces, hyphens, apostrophes, and periods. Examples: \"San Francisco\", \"St. Louis\", \"O'Fallon\", \"Wilkes-Barre\". Surrounding whitespace is trimmed; maximum 100 characters."
},
"phase": {
"type": "array",
"items": {
"enum": [
"Phase 1",
"Phase 2",
"Phase 3",
"Phase 4",
"N/A",
"EARLY_PHASE1",
"PHASE1",
"PHASE2",
"PHASE3",
"PHASE4",
"NA"
],
"type": "string",
"description": "Trial phase. One of: \"Phase 1\", \"Phase 2\", \"Phase 3\", \"Phase 4\", \"N/A\" - or the raw value a trial record reports (\"PHASE1\", \"EARLY_PHASE1\", \"PHASE2\", \"PHASE3\", \"PHASE4\", \"NA\"). Combined-phase trials (e.g. Phase 1/Phase 2) surface under each component bucket, so a Phase 1 filter also matches a Phase 1/Phase 2 study."
},
"maxItems": 10
},
"state": {
"type": "string",
"description": "Two-letter US state code (e.g. CA, NY, TX, FL). Case-insensitive on input; normalized to uppercase. DC is accepted. Full state names like 'California' are not accepted - use 'CA' instead."
},
"cursor": {
"type": "string",
"minLength": 1,
"description": "Opaque pagination cursor returned by a previous call's nextCursor field. Omit to start from the beginning of the result set. Cursors are tied to the exact filter set used to issue them - reusing a cursor with different filters returns an invalid_cursor error."
},
"status": {
"type": "array",
"items": {
"enum": [
"RECRUITING",
"NOT_YET_RECRUITING",
"ENROLLING_BY_INVITATION"
],
"type": "string",
"description": "Recruitment status. One of: \"RECRUITING\", \"NOT_YET_RECRUITING\", \"ENROLLING_BY_INVITATION\". The MCP server only exposes the three active statuses - completed, terminated, withdrawn, etc. are not searchable."
},
"maxItems": 3
},
"facility": {
"type": "string",
"maxLength": 200,
"minLength": 1,
"description": "Exact facility name match. Scopes results to trials running at this named site."
},
"pageSize": {
"type": "integer",
"default": 20,
"maximum": 50,
"minimum": 1,
"description": "Number of results per page. Integer in [1, 50]. Default 20."
},
"condition": {
"type": "string",
"maxLength": 120,
"minLength": 1,
"description": "Condition to filter by: a curated slug ('breast-cancer'), its label ('Breast Cancer') or a condition name as it appears in trial records ('Breast Neoplasms'). Case-insensitive. Call clinicaltrials_list_conditions to see the valid values; an unrecognized condition is rejected with suggestions, never ignored."
},
"studyType": {
"type": "array",
"items": {
"enum": [
"INTERVENTIONAL",
"OBSERVATIONAL",
"EXPANDED_ACCESS"
],
"type": "string",
"description": "Trial study type from ClinicalTrials.gov. One of: \"INTERVENTIONAL\", \"OBSERVATIONAL\", \"EXPANDED_ACCESS\". Values match AACT's canonical enum exactly (uppercase)."
},
"maxItems": 3
},
"interventionType": {
"type": "array",
"items": {
"enum": [
"DRUG",
"DEVICE",
"BEHAVIORAL",
"PROCEDURE",
"BIOLOGICAL",
"DIAGNOSTIC_TEST",
"DIETARY_SUPPLEMENT",
"RADIATION",
"COMBINATION_PRODUCT",
"GENETIC",
"OTHER"
],
"type": "string",
"description": "Intervention type. One of: \"DRUG\", \"DEVICE\", \"BEHAVIORAL\", \"PROCEDURE\", \"BIOLOGICAL\", \"DIAGNOSTIC_TEST\", \"DIETARY_SUPPLEMENT\", \"RADIATION\", \"COMBINATION_PRODUCT\", \"GENETIC\", \"OTHER\". Values match AACT's canonical enum exactly (uppercase)."
},
"maxItems": 11
},
"healthyVolunteersOnly": {
"type": "boolean"
}
}
}