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PubMed Bibliographic Search via NCBI eSearch
x402
PubMed Bibliographic Search via NCBI eSearch is a paid API for AI agents from project-api-gamma-sable.vercel.app, paid per call via x402, $0.01/call, status unknown (last checked 2026-10-11).
Searches the NCBI PubMed database for biomedical literature and returns a slim JSON list of matching article IDs plus a UI link, paid per call via USDC on Base.
Price / call$0.01
Success—
StatusUnknown
How this service works
Paid public-data feeds. Unpaid requests return HTTP 402. Prices are USDC on Base.
Output
Returns a slim JSON object containing a list of matching PubMed article items (typically IDs and minimal bibliographic info), a source path indicator, a description of the query type (NCBI eSearch), and a UI link to view results directly on PubMed.
Example use cases
Drug interaction literature review
“Can you search PubMed for studies about interactions between metformin and statins? Give me up to 20 results.”
Clinical trial discovery for rare disease
“Find PubMed articles about clinical trials for Duchenne muscular dystrophy — I need at least 15 results to review.”
Background research for grant proposal
“Search PubMed for peer-reviewed papers on gut microbiome and depression, limiting to 10 results starting from the 5th entry.”
Technical details
Endpoint
GEThttps://project-api-gamma-sable.vercel.app/paid/pubmed/search?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need programmatic, pay-per-call access to PubMed bibliographic search results without managing an NCBI API key, and when your agent infrastructure already supports x402 micropayments in USDC on Base. It is well-suited for AI agents that need to dynamically retrieve scientific literature references on demand at low cost ($0.01/call).
Side effects
- HTTP 402 returned if payment is not included or USDC on Base is not provided
- Empty items array if no articles match the search term
- Missing required 'term' query parameter causes a 400 or error response
- Rate limiting or upstream NCBI outage may cause timeouts or 5xx errors
- Invalid or malformed query strings may return zero results without explicit error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"example": {
"what": "NCBI PubMed bibliographic search via esearch (slim JSON + uiLink)",
"items": [],
"source": "/paid/pubmed/search"
}
}Tags
x402
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