Is there an API for ClinicalTrials.gov?

ClinicalTrials.gov does not offer a public data API for this, but Anakin Wire provides 6 maintained endpoints for clinicaltrials.gov. You call Anakin's REST API with an action ID and parameters and get structured JSON back; Anakin handles the browser, proxies, anti-bot, and parsing.

How do I scrape ClinicalTrials.gov data?

POST to https://api.anakin.io/v1/wire/task with your API key, the action ID, and its parameters, then poll GET /v1/wire/jobs/{id} until the job settles. There is nothing to install and no scraper to maintain — when clinicaltrials.gov changes its markup, Anakin updates the action.

Do I need a ClinicalTrials.gov account?

No. Every ClinicalTrials.gov action listed here runs anonymously — no account and no credentials required.

What does the ClinicalTrials.gov API cost?

Usage-based credits, charged per call and refunded automatically when a job fails. New accounts start with 300 free credits and no card. See anakin.io/pricing for the current rates.

Research

ClinicalTrials.gov API

clinicaltrials.gov

ClinicalTrials.gov - registry search, filter vocabularies, and full study protocol metadata.

Actions: 6
Category: Research
Login: Not required
Output: JSON

Get an API key Wire API reference

Call the ClinicalTrials.gov API

Submit a task, then poll the job until it settles. This example runs act_clinicaltrials_gov_condition_suggest.

curl -X POST https://api.anakin.io/v1/wire/task \
  -H "X-API-Key: $ANAKIN_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "action_id": "act_clinicaltrials_gov_condition_suggest",
    "params": {
      "search_condition": "cancer"
    }
  }'

6 actions on clinicaltrials.gov

Read

Condition Suggest
act_clinicaltrials_gov_condition_suggestread1 credit / call
Returns medical condition autocomplete suggestions matching a typed keyword.
search_condition
string · required
Intervention Suggest
act_clinicaltrials_gov_intervention_suggestread1 credit / call
Returns drug and treatment name autocomplete suggestions matching a typed keyword.
search_intervention
string · required
Location Facility Suggest
act_clinicaltrials_gov_location_facility_suggestread1 credit / call
Returns facility location autocomplete suggestions narrowed by an optional keyword.
facility_search
string
Sponsor Suggest
act_clinicaltrials_gov_sponsor_suggestread1 credit / call
Returns lead sponsor name autocomplete suggestions narrowed by an optional keyword.
sponsor_search
string
Trial Search Results
act_clinicaltrials_gov_trial_search_resultsread2 credits / call
Returns trials matching condition, intervention, and location with NCT ids, titles, status, and hits.
search_condition
string · required
search_intervention
string · required
location
string · required
country_code
string · required
offset
string · required
Trial Study Details
act_clinicaltrials_gov_trial_study_detailread2 credits / call
Returns full protocol details for a trial including status, phases, sponsor, interventions, and outcomes.
nct_id
string · required
search_condition
string · required
search_intervention
string · required

ClinicalTrials.gov API questions

Is there an API for ClinicalTrials.gov?: ClinicalTrials.gov does not offer a public data API for this, but Anakin Wire provides 6 maintained endpoints for clinicaltrials.gov. You call Anakin's REST API with an action ID and parameters and get structured JSON back; Anakin handles the browser, proxies, anti-bot, and parsing.
How do I scrape ClinicalTrials.gov data?: POST to https://api.anakin.io/v1/wire/task with your API key, the action ID, and its parameters, then poll GET /v1/wire/jobs/{id} until the job settles. There is nothing to install and no scraper to maintain — when clinicaltrials.gov changes its markup, Anakin updates the action.
Do I need a ClinicalTrials.gov account?: No. Every ClinicalTrials.gov action listed here runs anonymously — no account and no credentials required.
What does the ClinicalTrials.gov API cost?: Usage-based credits, charged per call and refunded automatically when a job fails. New accounts start with 300 free credits and no card. See anakin.io/pricing for the current rates.