# PubMed Search via NCBI E-utilities (JSON-Pick Format)

> PubMed Search via NCBI E-utilities (JSON-Pick Format) is a paid API for AI agents from x402-v2-mint-pubmed-search.vercel.app, paid per call via x402, $0.004/call, status unknown (last checked 2026-10-31).

Searches PubMed using NCBI E-utilities without an API key, returning a JSON object with result count, article ID list, and optional metadata fields (title, journal, publication date) for up to 10 results.

## Facts

- Endpoint: POST https://x402-v2-mint-pubmed-search.vercel.app/v1/pubmed-search/fmt/json-pick?utm_source=zero.xyz
- Price: $0.004/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-31
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/pubmed-search-via-ncbi-e-utilities-json-pick-format-c79180fb
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_eVxrKTXTTTPVlN8lVTCGS

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 pubmed-search-via-ncbi-e-utilities-json-pick-format-c79180fb -d '<json body>'
```

Example prompt: Search PubMed for up to 10 articles about CRISPR gene editing in cancer therapy and return the titles, journals, and publication dates in JSON.

## When to prefer this

Use this endpoint when you need a quick, keyless PubMed search returning structured JSON with optional article metadata (title, journal, pubdate) for up to 10 results. Prefer it over raw NCBI E-utilities calls when you want a simple pay-per-call API without managing an NCBI API key, and when you need the JSON-pick format specifically (structured field selection rather than raw XML or full records).

## Known failure modes

- Query string missing or malformed — returns error with no results
- retmax exceeds limit of 10 — capped or returns error
- NCBI E-utilities temporarily unavailable — upstream timeout or 5xx error
- No results found for query — returns count 0 and empty ID list
- Malformed JSON response if upstream NCBI API changes format

## How this service works

[concierge json-pick] PubMed search via NCBI E-utilities (keyless). Query → count + idlist (retmax≤10) + optional title/journal/pubdate.

## Output

A JSON object containing the total count of matching PubMed articles, a list of up to 10 PubMed IDs, and for each article (if requested) the title, journal name, and publication date.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/pubmed-search-via-ncbi-e-utilities-json-pick-format-c79180fb/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-v2-mint-pubmed-search.vercel.app](https://www.zero.xyz/host/x402-v2-mint-pubmed-search.vercel.app/llms.txt)