# Suverse PubMed Search

> Suverse PubMed Search is a paid API for AI agents from proxy.suverse.io, paid per call via x402, $0.002/call, status unknown (last checked 2026-09-15).

Search PubMed biomedical literature by keyword term and retrieve matching PubMed IDs (PMIDs) and total result count via NCBI E-utilities.

## Facts

- Endpoint: POST https://proxy.suverse.io/v1/data/suverse-bio-pubmed-search
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/suverse-pubmed-search-6fefd78b
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_HQRR1ePrtCpQxePpOH71t

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 suverse-pubmed-search-6fefd78b -d '<json body>'
```

Example prompt: Search PubMed for papers on CRISPR gene editing and give me the matching PMIDs and total number of results.

## When to prefer this

Choose this endpoint when you need keyless, pay-per-call access to PubMed search without setting up an NCBI API key. Ideal for agents that need to discover biomedical paper IDs on demand for a given term, especially in pipelines that then fetch full article metadata downstream. Prefer this over direct NCBI E-utilities calls when you want a simple, metered HTTP interface with no authentication overhead.

## Known failure modes

- Empty result set if the search term is too specific or misspelled
- NCBI rate limiting or downtime causing failed requests
- Malformed input body returning a 400 error
- Proxy service unavailability returning a 402 or 5xx error
- Very broad terms returning extremely large PMID lists that may be truncated

## How this service works

Search PubMed biomedical literature by term; returns matching PMIDs and total count. Keyless NCBI E-utilities. For agents discovering biomedical papers and citation IDs.

## Output

Returns a list of PubMed IDs (PMIDs) matching the search term and a total count of matching records, sourced from NCBI E-utilities without requiring an API key.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method",
    "bodyType",
    "body"
   ],
   "properties": {
    "body": {
     "properties": {}
    },
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "POST",
      "PUT",
      "PATCH"
     ],
     "type": "string"
    },
    "bodyType": {
     "enum": [
      "json",
      "form-data",
      "text"
     ],
     "type": "string"
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/suverse-pubmed-search-6fefd78b/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proxy.suverse.io](https://www.zero.xyz/host/proxy.suverse.io/llms.txt)