# naulon

> These figures are automated measurements with timestamps. They are not a review, rating, grade, or recommendation.

Check citations and retractions by DOI, and see the x402 price an AI agent pays to cite a source.

- Status: Up
- Checks passed: 14 of 22
- Uptime: Not measured
- Latency: 286 ms
- Tools: 8
- Last probe: 2026-11-12T09:52:08.983Z
- Publisher: naulon.app (https://mcpheartbeat.com/p/app.naulon)
- Endpoint: https://gate.naulon.app/_naulon/mcp/public
- Transport: streamable-http

## Tools

Showing 8.

- **naulon_appraise**: Score how relevant each candidate is to the topic, from its free teaser alone — a 0..1 relevance plus a one-line rationale. Pass the candidates you got from nau
- **naulon_check_citations**: FREE citation and retraction check. For up to 25 references (a DOI, PMID, PMCID, arXiv id, or the reference as written), say whether each work exists and whethe
- **naulon_discover**: Browse a TOPIC: list candidate articles by title and teaser, with no verdict on whether any of them answers a question. Returns FREE public teasers only — slug,
- **naulon_lookup**: FREE. Get the record of one source you already have the address of: a publisher page by its URL, or a paper by DOI, PMID, PMCID or arXiv id. For a page it retur
- **naulon_quote**: Probe the real x402 toll for a source WITHOUT paying — the free 402 price check. Returns the author price, the buyer's true total (when the publisher adds extra
- **naulon_retrieve**: FREE preview, RESEARCH PAPERS only. For a question, lists the open CC0, CC BY, CC BY-SA or public-domain papers that could answer it and the price of each mode
- **naulon_search**: FREE. Ask a QUESTION: search every naulon publisher's articles and get each match priced, with its public summary, `url`, and a verdict on whether it answers th
- **naulon_trace_passage**: FREE. Find which naulon publisher pages a passage was copied from, word for word. Returns each page's title, url, and whether it holds most of the passage or pa

## Links

- HTML: https://mcpheartbeat.com/s/app.naulon/naulon
- Markdown: https://mcpheartbeat.com/s/app.naulon/naulon.md
- MCP: https://mcpheartbeat.com/mcp
- API: https://mcpheartbeat.com/api/v1/servers
- Tools API: https://mcpheartbeat.com/api/v1/tools
- Server API: https://mcpheartbeat.com/api/v1/health?server=app.naulon%2Fnaulon