# Pubmed

5 endpoints on Pubmed. Every one returns the same response shape and has a flat, published price in credits.

Category: [Science & research](https://onekey.dev/docs/categories/science.md) · [Overview page](https://onekey.dev/platforms/pubmed)

## Endpoints

| Endpoint | What it does | Cost | Status |
| --- | --- | --- | --- |
| [`cited_by`](https://onekey.dev/docs/api/pubmed/cited_by.md) | PubMed articles citing a PMID. | 5 credits | stable |
| [`database_info`](https://onekey.dev/docs/api/pubmed/database_info.md) | PubMed database statistics (record count, last update). | 1 credit | stable |
| [`related`](https://onekey.dev/docs/api/pubmed/related.md) | PubMed articles related to a PMID. | 5 credits | stable |
| [`search`](https://onekey.dev/docs/api/pubmed/search.md) | Search PubMed; returns matching PMIDs. | 5 credits | stable |
| [`search_recent`](https://onekey.dev/docs/api/pubmed/search_recent.md) | Search PubMed sorted by publication date; returns PMIDs. | 5 credits | stable |

Every endpoint page has a **Field mapping** section showing which source field becomes which [unified field](https://onekey.dev/docs/schema.md) (fixed schema) or platform-specific `ext.` field.