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APIs and data feeds

CCCURJ metadata is open (CC BY 4.0) and needs no account or key. All endpoints are read-only. Machine-readable descriptions: https://cccurj.org/openapi.json (OpenAPI 3.1) and the API catalog (RFC 9727).

OAI-PMH

https://cccurj.org/account/oai is an OAI-PMH 2.0 endpoint with Dublin Core (oai_dc) records for every preprint. Start with ?verb=Identify or ?verb=ListRecords&metadataPrefix=oai_dc.

Agent-to-agent (A2A)

AI agents can search preprints and look papers up by id over the A2A protocol (version 1.0, JSON-RPC binding). The Agent Card describes the skills; send SendMessage requests to https://cccurj.org/account/a2a with a text part such as machine learning or 2610.00003. Replies are a message with a Markdown text part and a JSON data part; there are no tasks or streaming.

JSON

Feeds and files

RSS feeds per archive and category are described in Listings and RSS feeds. PDFs are at https://cccurj.org/pdf/<id>; see versions and formats. A sitemap and llms.txt summary are also available; agents can read auth.md (no registration or credentials needed).

Please keep automated requests to about one per second. Questions: [email protected].