# SYNTHORA OpenAlex Work Metadata by DOI

> SYNTHORA OpenAlex Work Metadata by DOI is a paid API for AI agents from openalex-work-by-doi.hergertsynthora.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-13).

Resolves a DOI to its full OpenAlex work record, including title, authorships, institutions, citations, open-access location, and topic classification

## Facts

- Endpoint: POST https://openalex-work-by-doi.hergertsynthora.com/service
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-13
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/synthora-openalex-work-metadata-by-doi-819e1acc
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_VuIai9o840Oap9sNCq7E6

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 synthora-openalex-work-metadata-by-doi-819e1acc -d '<json body>'
```

Example prompt: Can you pull the full OpenAlex record for the paper with DOI 10.1038/s41586-021-03819-2 — I need the authors, their institutions, citation count, and what topics it's classified under?

## When to prefer this

Choose this endpoint when you need a single, comprehensive OpenAlex work record for a known DOI without needing an API key — ideal for autonomous agents and agent-to-agent pipelines that need bibliographic enrichment, citation graph construction, or scholarly provenance verification at low cost per call. Prefer this over direct OpenAlex API calls when operating in a pay-per-use, keyless x402 environment.

## Known failure modes

- DOI not found in OpenAlex — returns ok:false or empty result
- Malformed DOI string — may return error or null record
- DOI exists but OpenAlex has incomplete metadata — partial result fields
- Rate limiting or payment failure — HTTP 402 or 429 response
- Network timeout if OpenAlex upstream is slow

## How this service works

Resolves a single DOI to its full OpenAlex work record: title, authorships with institutions, referenced works, citation count, open-access location and topic classification. A high-value keyless enrichment endpoint for autonomous agents and agent-to-agent workflows building citation graphs and verifying scholarly provenance. First 3 calls FREE per wallet — send header X-WALLET: 0x<addr>. No charge on upstream failure.

## Output

A JSON object with ok:true and a result field containing the full OpenAlex work record for the given DOI, including title, authorship list with institutional affiliations, referenced works, citation count, open-access URL, and topic/subject classifications.

## Request schema (JSON Schema)

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

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ok": true,
  "niche": "openalex-work-by-doi",
  "result": {}
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/synthora-openalex-work-metadata-by-doi-819e1acc/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from openalex-work-by-doi.hergertsynthora.com](https://www.zero.xyz/host/openalex-work-by-doi.hergertsynthora.com/llms.txt)