Clinical Trial Sites and Locations by NCT Number (ClinicalTrials.gov)

clinicaltrials/study-sites

Where one clinical study runs, from ClinicalTrials.gov by NCT number: each site's facility name, city, state, zip, country, the site's own recruitment status and a map point, with the study's title, overall status and last-updated date. Site status can differ from the study's. The map point is the city's, so two hospitals in one city share it. State and zip are as the sponsor typed them and often absent outside the United States. A study can list over a thousand sites (a 226 KB answer); most list one. Returns no contact names, phones or emails. Attribution: Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine, National Institutes of Health. Data fields selected, no values changed. Served by Eden Engine; not an official ClinicalTrials.gov product.

activeper callv2

Price

$0.0026 per call

You pay the price shown. If a call turns out to cost more than its quote, you pay the actual price, capped at twice the quote. No monthly minimum. Top-ups start at $5.

Data source

ClinicalTrials.gov

Source: ClinicalTrials.gov, a database of the U.S. National Library of Medicine, National Institutes of Health. Data processed by ClinicalTrials.gov, refreshed each weekday; each study carries its last-update date and every call reads the live registry. A fixed subset of fields is returned and no value is changed. Some ClinicalTrials.gov data may be subject to third-party copyright; free-text descriptions, documents and results are not returned. Served by Eden Engine; not an official ClinicalTrials.gov product.

Use it

Five steps: search, inspect, learn, run, settle. No per-tool setup; your agent reaches this tool through the meta-tools it already has.

Connect once and your AI can find and run this tool, and any other it needs.

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agent

// 1. search: find the tool
omnial_search({ query: "what you need" })

// 2. inspect: price and input schema
omnial_inspect({ tool: "clinicaltrials/study-sites" })

// 3. learn: read the usage guide at runtime
omnial_learn({ tool: "clinicaltrials/study-sites" })

// 4. run: price the exact call first, then run it
omnial_execute({ tool: "clinicaltrials/study-sites", input: { /* see input_schema */ }, dry_run: true })
omnial_execute({ tool: "clinicaltrials/study-sites", input: { /* ... */ } })

// 5. settle: the call is charged when it finishes, nothing to do

Not connected yet? Point your MCP client at https://mcp.eden-engine.com/mcp, then copy a config for your client.

Pricing

Every charge this tool can incur.

Charge	Price
Per call	$0.0026

Updated: Oct 20, 2026

Input and output schemas

Input schema

input_schema.json

{
  "type": "object",
  "required": [
    "nct_id"
  ],
  "properties": {
    "nct_id": {
      "type": "string",
      "pattern": "^NCT[0-9]{8}$",
      "description": "The study's NCT number: NCT followed by eight digits, for example NCT02047500. A search result's identificationModule.nctId is one."
    }
  },
  "additionalProperties": false
}

Output schema

output_schema.json

{
  "type": "object",
  "required": [
    "protocolSection"
  ],
  "properties": {
    "hasResults": {
      "type": "boolean",
      "description": "True when the sponsor has posted results on ClinicalTrials.gov."
    },
    "protocolSection": {
      "type": "object",
      "description": "identificationModule (nctId, briefTitle), statusModule (overallStatus, lastUpdatePostDateStruct) and contactsLocationsModule, whose locations array holds one object per site: facility, status, city, state, zip, country and geoPoint (lat, lon, the city's). contactsLocationsModule is absent when the study has no site on record, and state, zip, status and geoPoint are absent on a site that lacks them.",
      "additionalProperties": true
    }
  },
  "description": "One study's identity and its sites, in ClinicalTrials.gov's own structure.",
  "additionalProperties": true
}