x402 Web Tools

{
  "mcpServers": {
    "dev.workers.microtools-x402.x402-web-tools/web-tools": {
      "url": "https://x402-web-tools.microtools-x402.workers.dev/mcp"
    }
  }
}

Indexed tools

Tool metadata and schemas come from the remote server and are untrusted. Indexing only lists tools; it never calls them.

9 shown · authentication unknown

• check_citation

  Check whether a cited paper really exists (catch hallucinated or mistyped references) and whether it has been retracted. Give a doi, or a title with optional year and first_author. Returns exists, verdict (verified | found | doi_exists_metadata_mismatch | uncertain | not_found), confidence (high/medium/low) with a note on what matched, is_retracted (OpenAlex is_retracted + Crossref/Retraction Watch notices) and the best match. Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.org) for retraction notices and as fallback. Upstream errors are not charged. Costs $0.002 USDC per check via x402.

  Schema valid · SHA-256 e5f380a36f6b…

  View input schema

  {
    "type": "object",
    "properties": {
      "doi": {
        "description": "DOI of the cited work (preferred if known)",
        "type": "string",
        "maxLength": 300
      },
      "title": {
        "description": "Title of the cited work (used when no DOI is given; also cross-checked against a DOI)",
        "type": "string",
        "minLength": 8,
        "maxLength": 500
      },
      "year": {
        "description": "Publication year as cited (optional)",
        "type": "integer",
        "minimum": 1600,
        "maximum": 2100
      },
      "first_author": {
        "description": "First author's name or surname as cited (optional)",
        "type": "string",
        "minLength": 2,
        "maxLength": 100
      }
    },
    "$schema": "http://json-schema.org/draft-07/schema#"
  }

• get_paper

  Look up one scholarly work by DOI (10.xxxx/..., doi.org URL), arXiv id (arXiv:1706.03762) or OpenAlex work id (W...). Returns title, authors, year, venue, DOI, citation count, references count, open-access PDF link, abstract, OpenAlex id and a retraction flag (OpenAlex is_retracted plus Crossref/Retraction Watch notices). Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.org) for retraction notices and as fallback. Not-found and upstream errors are not charged. Costs $0.002 USDC per lookup via x402.