# PubMed Biomedical Literature Search

> PubMed Biomedical Literature Search is a paid API for AI agents from research.memoryapi.org, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Search NIH PubMed biomedical literature with filtering by query, result limit, and sort order

## Facts

- Endpoint: GET https://research.memoryapi.org/x402/research/pubmed
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/research-memoryapi-org-1c96d267
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_dxSoBkfJ87mraid5XojWh

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability research-memoryapi-org-1c96d267
```

Example prompt: Search PubMed for the top 10 most recent studies on CRISPR gene therapy for sickle cell disease, sorted by publication date.

## When to prefer this

Choose this endpoint when you need peer-reviewed, NIH-indexed biomedical and clinical literature specifically. Prefer this over arXiv for clinical, pharmaceutical, or life sciences research that requires the PubMed corpus, and over OpenAlex when you need PubMed-specific indexing, MeSH terms, or NIH-sourced metadata.

## Known failure modes

- Empty query returns no results or an error
- Query too vague returns irrelevant results
- Invalid sort order parameter causes request failure
- Rate limiting or payment failure results in 402 error
- PubMed API downtime causes upstream failure
- Limit set too high may be rejected or throttled

## How this service works

Scientific literature search API with x402 micropayments. Search PubMed, arXiv, and Crossref citations.

## Output

A list of PubMed article records matching the search query, including titles, authors, publication dates, abstracts, and PubMed IDs, filtered and sorted according to the specified parameters.

## Example request

```json
{
 "sort": "date",
 "limit": 10,
 "query": "artificial intelligence in healthcare"
}
```

## Response schema (JSON Schema)

```json
{
 "example": {
  "count": 10,
  "query": "cancer immunotherapy",
  "source": "PubMed / NIH",
  "success": true,
  "articles": [
   {
    "doi": "10.1038/nm.12345",
    "pmid": "38712345",
    "title": "CAR-T cell therapy advances",
    "authors": [
     "Smith J",
     "Doe A"
    ],
    "journal": "Nature Medicine",
    "pub_date": "2024 Jan",
    "abstract_url": "https://pubmed.ncbi.nlm.nih.gov/38712345"
   }
  ],
  "total_found": 98432
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/research-memoryapi-org-1c96d267/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from research.memoryapi.org](https://www.zero.xyz/host/research.memoryapi.org/llms.txt)