← Crossref DOI Metadata
research by fourzerotwo
Search publishers
Crossref member publishers by name.
Search publishers Free
Crossref member publishers by name.
- cost
- Free then $0.002 / call
- MCP tool
- crossref__members
- method
- GET
Free up to 50 calls a day over MCP (500 with a free key), then $0.002 per call by card credit or USDC. Free key · Pay by card
GET https://fourzerotwo.si/v1/crossref/members
| Param | Type | Description |
|---|---|---|
| q | string | Publisher |
# free: send a free key from https://fourzerotwo.si/free curl -H "X-API-Key: fzt_…" "https://fourzerotwo.si/v1/crossref/members?q=Elsevier" # no key: returns 402 with the price, for x402 agents curl -i "https://fourzerotwo.si/v1/crossref/members?q=Elsevier"
by fourzerotwo
Report this endpoint
Use it from an AI agent (MCP)
Add the server once, then ask for this data in plain English. The agent finds the endpoint with search_apis and runs it with call_api.
{
"mcpServers": {
"fourzerotwo": { "type": "http", "url": "https://fourzerotwo.si/mcp" }
}
}
# the call the agent makes
call_api {"tool": "crossref__members", "arguments": {"q":"Elsevier"}}
More from Crossref DOI Metadata
- DOI lookup — Title, authors, journal, dates, references count and licence for a DOI.
- Search works — Bibliographic search across Crossref works.
- Journal by ISSN — Journal title, publisher and DOI counts by ISSN.
- Search funders — Research funders by name, with Funder Registry ids.
Metadata from Crossref (crossref.org).