# CitationCheck HG – Bibliography Reference Auditing API

> CitationCheck HG – Bibliography Reference Auditing API is a paid API for AI agents from microinvestigacion-hg.heroga32881.chatgpt.site, paid per call via x402, $0.05/call, status unknown (last checked 2026-10-12).

Validates and audits up to 10 academic references per batch in BibTeX, RIS, or CSL-JSON formats by comparing fields against Crossref and DataCite, then exports corrected metadata.

## Facts

- Endpoint: POST https://microinvestigacion-hg.heroga32881.chatgpt.site/api/bibliography?utm_source=zero.xyz
- Price: $0.05/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-12
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/citationcheck-hg-bibliography-reference-auditing-api-d57ce730
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mNg3ywoTvZ_VjGGc7xVZQ

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 citationcheck-hg-bibliography-reference-auditing-api-d57ce730 -d '<json body>'
```

Example prompt: Can you audit these 5 BibTeX references for me and flag any fields that don't match what Crossref has on record? I want to see the differences and get back a corrected BibTeX export.

## When to prefer this

Choose this endpoint when you need to programmatically validate or audit academic citations against authoritative registries (Crossref, DataCite) in batch, especially when working with structured formats like BibTeX, RIS, or CSL-JSON. It is particularly useful for agents embedded in academic writing workflows that need to catch metadata errors before publication. If you only need to resolve a DOI to metadata (without comparison), a simpler DOI lookup API may suffice.

## Known failure modes

- More than 10 references submitted — batch size limit exceeded
- Invalid or unparseable BibTeX/RIS/CSL-JSON input — format parse error
- DOI not found in Crossref or DataCite — unresolvable reference
- Malformed request body — missing required fields
- Network timeout reaching Crossref or DataCite upstream APIs
- Payment not fulfilled — x402 payment required before processing

## How this service works

Auditá hasta 10 referencias por lote en DOI, BibTeX, RIS o CSL-JSON. Compará campos con Crossref y DataCite, recuperá evidencia y exportá metadatos registrados. Muestras gratuitas y suscripción prepaga.

## Output

Returns a JSON object containing: a summary with the count of references that have field differences versus authoritative sources, plus exports of the validated references in BibTeX, RIS, and CSL-JSON formats. The schema version field confirms the response format.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "format": {
   "enum": [
    "bibtex",
    "ris",
    "csl-json"
   ],
   "type": "string"
  },
  "references": {
   "oneOf": [
    {
     "type": "array",
     "items": {
      "type": "object"
     },
     "maxItems": 10,
     "minItems": 1
    },
    {
     "type": "object"
    }
   ]
  },
  "bibliography": {
   "type": "string",
   "maxLength": 20000
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "exports": {
   "ris": "",
   "bibtex": "",
   "cslJson": []
  },
  "summary": {
   "referencesWithDifferences": 1
  },
  "schemaVersion": "bibliography-1.0"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/citationcheck-hg-bibliography-reference-auditing-api-d57ce730/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from microinvestigacion-hg.heroga32881.chatgpt.site](https://www.zero.xyz/host/microinvestigacion-hg.heroga32881.chatgpt.site/llms.txt)