# ISHOB Document References Lookup

> ISHOB Document References Lookup is a paid API for AI agents from api.ishob.com, paid per call via x402, $0.002/call, status unknown (last checked 2026-10-14).

Retrieve the list of cited references (bibliography) for a document by its ID from the ISHOB licensed archive

## Facts

- Endpoint: GET https://api.ishob.com/api/document/%7Bid%7D/references?utm_source=zero.xyz
- Price: $0.002/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/ishob-document-references-lookup-939a181a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_qfukcGRcNTnq-GsPSdH1T

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 ishob-document-references-lookup-939a181a
```

Example prompt: Can you pull the full reference list for the document with ID pmc-13364419 from the ISHOB archive — I need the DOIs, citation labels, and text for each cited paper.

## When to prefer this

Use this endpoint when you need the bibliography or citation list for a specific document already identified by its archive ID (e.g. a PMC ID). Prefer this over full-text search when you already have a document ID and only need its references, not its full content. It is purpose-built for citation graph construction, literature review automation, and reference verification workflows.

## Known failure modes

- Document ID not found — returns empty references array or 404-equivalent
- Malformed or missing ID parameter — likely returns a validation error
- Document exists in archive but has no extractable references — returns empty list
- Access denied if document is not in the licensed archive

## How this service works

36 MCP tools & x402 pay-per-call APIs for AI agents: crypto risk, web extraction, screenshots, agent alarms, weather, company data. No API key.

## Output

A JSON object containing a 'references' array where each entry includes a DOI string, the full citation text, and a citation label (e.g. '1.'); also includes a 'canonical_id' field identifying the source document (e.g. 'pmc-13364419').

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "properties": {
   "type": "string"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "references": [
   {
    "doi": "10...",
    "text": "...",
    "label": "1."
   }
  ],
  "canonical_id": "pmc-13364419"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/ishob-document-references-lookup-939a181a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.ishob.com](https://www.zero.xyz/host/api.ishob.com/llms.txt)