Crossref
research:crossref · www.crossref.org/documentation/retrieve-metadata/rest-api/ ↗
Metadata for 160M+ DOIs: journal articles, books, conference papers and their references.
About the Crossref API
Crossref API on Apizie: 3 endpoints (Search works, DOI, Journals) returned as clean JSON through one API key. 3 endpoints are live now. Call it over REST at https://apizie.tech/v1/research:crossref/{endpoint} or from Claude, ChatGPT and Cursor through the Apizie MCP server. Free plan: 1,000 requests a month.
| Project key | research:crossref |
|---|---|
| Status | Live |
| Endpoints | 3 |
| Category | Research |
| Source | www.crossref.org/documentation/retrieve-metadata/rest-api/ |
| Base URL | https://apizie.tech/v1/research:crossref/{endpoint} |
| For AI tools | OpenAPI spec · Markdown (what is this?) |
Crossref API FAQ
How do I call the Crossref API?
Create a free Apizie key, then send GET https://apizie.tech/v1/research:crossref/works with the header x-api-key. Every endpoint returns { project, data, timestamp }.
Is the Crossref API free on Apizie?
Yes. The Free plan includes 1,000 requests a month at 100 requests a minute, no credit card.
Can AI agents use the Crossref API?
Yes. Add the Apizie MCP server (https://apizie.tech/mcp) to Claude, ChatGPT, Cursor or VS Code, then ask in plain language. The agent calls run_scraper with project key research:crossref.
What is the status of the Crossref API?
Live: works with just an Apizie key