# PubMed on Onekey

> 5 endpoints for PubMed (5 stable, 0 beta), 1 to 5 credits each. Category: Science & research. One key, one JSON shape.

Base URL: https://api.onekey.dev
Auth: header `x-api-key: <key>`. Call shape: `GET /v1/{platform}/{endpoint}?{params}`.
Every response is `{success, data, metadata, error}`; check `success` first. Cost is in `metadata.credits_charged`. Free when served from cache (0.2 credit for a cached response over 100 KB). Failed and not-found calls are refunded.
Status: stable = verified against the live source; beta = not yet verified, fields may be missing.

Page: https://onekey.dev/platforms/pubmed
Reference (Markdown): https://onekey.dev/docs/api/pubmed.md
All docs: https://onekey.dev/llms.txt

## Canonical fields returned

Unified-schema fields (same names on every platform), with how many of the 5 mapped PubMed endpoints return each:

- `content.id` (string): 4
- `entity.description` (string): 1
- `entity.name` (string): 1
- plus 2 platform-specific fields under `ext.`

## Endpoints

### pubmed.cited_by

PubMed articles citing a PMID.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/pubmed/cited_by?pmid=33087721` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `pmid` (string, required): PubMed id (PMID)
- Fields returned: `content.id`
- Reference: https://onekey.dev/docs/api/pubmed/cited_by.md

### pubmed.database_info

PubMed database statistics (record count, last update).
- Price: 1 credit per fresh call. Status: stable. Returns: one record.
- Request: `GET https://api.onekey.dev/v1/pubmed/database_info` with header `x-api-key: YOUR_API_KEY`
- Parameters: none
- Fields returned: `entity.name`, `entity.description`, `ext.records`, `ext.lastUpdate`
- Reference: https://onekey.dev/docs/api/pubmed/database_info.md

### pubmed.related

PubMed articles related to a PMID.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/pubmed/related?pmid=33087721` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `pmid` (string, required): PubMed id (PMID)
- Fields returned: `content.id`
- Reference: https://onekey.dev/docs/api/pubmed/related.md

### pubmed.search

Search PubMed; returns matching PMIDs.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/pubmed/search?q=crispr` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `q` (string, required): Search query
- Fields returned: `content.id`
- Reference: https://onekey.dev/docs/api/pubmed/search.md

### pubmed.search_recent

Search PubMed sorted by publication date; returns PMIDs.
- Price: 5 credits per fresh call. Status: stable. Returns: a list.
- Request: `GET https://api.onekey.dev/v1/pubmed/search_recent?q=crispr` with header `x-api-key: YOUR_API_KEY`
- Parameters:
  - `q` (string, required): Search query
- Fields returned: `content.id`
- Reference: https://onekey.dev/docs/api/pubmed/search_recent.md

## Sample request

```bash
curl "https://api.onekey.dev/v1/pubmed/database_info" \
  -H "x-api-key: YOUR_API_KEY"
```