Crossref
DOI metadata search
Search 160M+ Crossref records (journal articles, books, proceedings) by free text: DOI, title, authors, publication date, journal, publisher, citation count. Supports Crossref filters.
Use this tool with your agent
Give this to your agent
Use my connected Agentik MCP server. I want to use the tool crossref/search-works (DOI metadata search (Crossref)). Call inspect_tool with {"tool_id": "crossref/search-works"} first and tell me the price before anything runs. Ask me for the inputs it needs; never invent values, IDs or file URLs. When I confirm, call run_tool with tool_id "crossref/search-works" and my inputs, follow it with get_run if it is still running, and give me the result and the price Agentik reports. If the tool is unavailable, say so and use discover_tools to propose an alternative.Show the prompt
Paste it into Claude, ChatGPT or Codex: your agent takes it from there, and shows the price before it runs.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
query | string | Yes | |
rows | integer | No | |
filter | string | No | Crossref filter, e.g. 'from-pub-date:2024,type:journal-article' |
sort | string | No | Options: relevance, published, is-referenced-by-count, created. |
How your agent calls it
First inspect_tool for the current schema and price, then run_tool with the published example after confirming your inputs:
{
"tool_id": "crossref/search-works",
"input": {
"query": "large language models",
"rows": 2
}
}Price and billing
- Price
- Free
- Model
- Per call
- Detail
- No charge per call. A workspace is still needed so your agent can call it.
- License
- Crossref metadata, no reuse restriction
- Attribution
- Metadata from Crossref (api.crossref.org)
- The provider’s price, 0% markup.
- One prepaid balance for every provider; your agent sees the price before it runs.
- Pay for measured usage; unused reservations are released.