Aapipick
Search API · Clinical

Clinical & Pharmacology Search API

One endpoint over ClinicalTrials.gov, FDA drug labels, ChEMBL bioactivity, and DrugBank pharmacology. Pre-shaped JSON for medical RAG, drug-repurposing pipelines, and AI-driven clinical decision support.

30 credits / call30 req / minPOST /api/search/clinical

Try Clinical Search Live

Enter your API key and run a real query against the live endpoint.

API Authentication Required
Enter your API key to access this service. All API calls require authentication.

Don't have an API key?

Sign in to your account to create and manage your API keys.

Sign InManage API Keys
5 sample queries — click to load

API Integration Guide

Learn how to integrate this API into your applications with code examples and detailed documentation.

API Overview
Semantic search across ClinicalTrials.gov, FDA-approved drug labels, ChEMBL, and DrugBank. Returns titles, summaries, and source URLs ready for downstream LLMs.
POST
/api/search/clinical

Base URL

https://www.apipick.com

Full Endpoint

https://www.apipick.com/api/search/clinical
Parameters
Required and optional parameters for this API
query
required
string

Natural-language search query

max_num_results
optional
integer

1–5, default 5

relevance_threshold
optional
number

0.0–1.0 quality filter

country_code
optional
string

ISO country code (e.g. US, GB)

start_date
optional
string

ISO date YYYY-MM-DD

end_date
optional
string

ISO date YYYY-MM-DD

Code Examples
Copy and paste these examples to quickly integrate the API into your application

cURL Request

curl -X POST "https://www.apipick.com/api/search/clinical" \
  -H "Content-Type: application/json" \
  -H "x-api-key: YOUR_API_KEY" \
  -d '{
  "query": "CAR-T therapy effectiveness in pediatric leukemia latest studies",
  "max_num_results": 5,
  "country_code": "US",
  "start_date": "2026-01-01"
}'
Replace YOUR_API_KEY with your actual API key
Response Example
Example response from the API

JSON Response

{
  "query": "CAR-T therapy effectiveness in pediatric leukemia latest studies",
  "results": [
    {
      "title": "Example result",
      "url": "https://example.com/article",
      "snippet": "Short excerpt of the page content…",
      "source_type": "web",
      "published_at": "2026-04-15",
      "score": 0.92
    }
  ],
  "result_count": 1,
  "credits_used": 30,
  "remaining_credits": 99
}
Integration Tips

✓Best Practices

  • • Always include x-api-key header
  • • Always handle errors gracefully
  • • Validate input data before sending
  • • Use HTTPS for secure communication
  • • Cache responses when appropriate

ℹResponse Headers

  • • Content-Type: application/json
  • • x-api-key: Required for authentication
  • • Status codes: 200 (success), 400 (error), 401 (unauthorized)
  • • No rate limiting applied

Rate Limits

⏱️

Request Rate

30req / min

Per API key, per endpoint. Sliding 60-second window.

🔀

Concurrency

3concurrent

Max simultaneous in-flight requests per API key.

Response Headers

X-RateLimit-LimitMaximum requests allowed per minute
X-RateLimit-RemainingRequests remaining in the current window
X-RateLimit-ResetSeconds until the current window resets
Retry-AfterSeconds to wait before retrying (only on 429)

429 Too Many Requests

HTTP/1.1 429 Too Many Requests
Retry-After: 12
X-RateLimit-Limit: 30
X-RateLimit-Remaining: 0
X-RateLimit-Reset: 12

{
  "error": "rate_limit_exceeded",
  "message": "Rate limit exceeded: 30 requests/minute per API key. Retry after 12s.",
  "retry_after": 12
}

Frequently Asked Questions

Which sources are covered?

ClinicalTrials.gov (registered studies), FDA drug labels (Structured Product Labeling), ChEMBL (bioactivity data), and DrugBank (drug pharmacology). All four are queried in parallel.

Is this a substitute for medical advice?

No. The API surfaces public databases for research and software workflows. Output is not medical advice and must not be used for clinical decision-making without a qualified human in the loop.

Can I restrict to a date range?

Yes. Pass start_date and end_date to filter trials and label updates by date.

How do credits work for failed calls?

If the upstream search fails (5xx) or the query is invalid (4xx), no credits are deducted. You're only charged on a successful 2xx response.

Tool schema for OpenAI / Claude?

GET /api/search/clinical/tool-schema returns ready-to-paste OpenAI function and Claude tool-use definitions.