x402 Web Tools

Fetch a public web page and return its main content as clean Markdown (readability extraction): title, url, final_url, markdown, word_count. HTML, plain text, Markdown, JSON and XML. Static fetch only (no JavaScript rendering). Respects robots.txt, blocks private/loopback/metadata hosts, max 3 MB / 15 s, no logins or paywall bypass. For PDFs use read_pdf. Failed reads are not charged. Costs $0.002 USDC per call via x402.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "format": "uri",
      "description": "Public http(s) URL to read"
    }
  },
  "required": [
    "url"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Same as read_url plus a heuristic prompt-injection check: flags hidden/invisible text, instruction-like phrases ("ignore previous instructions", role reassignment, secret exfiltration, chat-template tokens), suspicious HTML comments and zero-width/Unicode-tag characters. Returns injection_check {flagged, risk none|low|medium|high, signals}. Heuristic, not a guarantee. Failed reads are not charged. Costs $0.003 USDC per call via x402.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "format": "uri",
      "description": "Public http(s) URL to read"
    }
  },
  "required": [
    "url"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Fetch a public PDF (max 10 MB) and convert it to Markdown with Cloudflare Workers AI toMarkdown. Returns title (if detected), url, markdown, word_count. Same URL safety rules as read_url. Failed conversions are not charged. Costs $0.006 USDC per call via x402.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "format": "uri",
      "description": "Public http(s) URL of a PDF file"
    }
  },
  "required": [
    "url"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Transcribe a public direct audio file URL (mp3, wav, m4a, ogg/opus, flac; max 25 MB and 10 minutes, checked from the file header before transcription) with Whisper (@cf/openai/whisper-large-v3-turbo) on Cloudflare Workers AI. Returns text, language, duration, segments with timestamps, optional SRT/VTT subtitles. YouTube/TikTok/Instagram and other page URLs are rejected. Failed transcriptions and files with no detected speech are not charged. Costs $0.01 USDC per file via x402.

{
  "type": "object",
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "format": "uri",
      "description": "Direct public URL of an audio file"
    },
    "language": {
      "description": "Optional ISO language hint, e.g. en, ur, es (auto-detected if omitted)",
      "type": "string",
      "minLength": 2,
      "maxLength": 5
    },
    "subtitles": {
      "description": "Also return SRT and/or WebVTT subtitles (default none)",
      "type": "string",
      "enum": [
        "none",
        "srt",
        "vtt",
        "both"
      ]
    },
    "include_words": {
      "description": "Include word-level timestamps in segments (default false)",
      "type": "boolean"
    }
  },
  "required": [
    "url"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Search scholarly papers (OpenAlex index of 250M+ works). Returns up to 25 results with title, authors, year, venue, DOI, citation count, open-access PDF link, abstract (reconstructed from OpenAlex's inverted index; may be null when the publisher withholds it) and OpenAlex id. Optional from_year / to_year / open_access_only filters. Data: OpenAlex (CC0, openalex.org) with Crossref REST (crossref.org) for retraction notices and as fallback. Upstream errors are not charged. Costs $0.005 USDC per search via x402.

{
  "type": "object",
  "properties": {
    "query": {
      "type": "string",
      "minLength": 2,
      "maxLength": 300,
      "description": "Search terms (title, abstract and full-text relevance search)"
    },
    "from_year": {
      "description": "Earliest publication year (inclusive)",
      "type": "integer",
      "minimum": 1600,
      "maximum": 2100
    },
    "to_year": {
      "description": "Latest publication year (inclusive)",
      "type": "integer",
      "minimum": 1600,
      "maximum": 2100
    },
    "open_access_only": {
      "description": "Only open-access works (default false)",
      "type": "boolean"
    },
    "limit": {
      "description": "Number of results, 1-25 (default 10)",
      "type": "integer",
      "minimum": 1,
      "maximum": 25
    }
  },
  "required": [
    "query"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "minLength": 3,
      "maxLength": 300,
      "description": "DOI, doi.org URL, arXiv:id or OpenAlex work id"
    }
  },
  "required": [
    "id"
  ],
  "$schema": "http://json-schema.org/draft-07/schema#"
}

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.

{
  "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#"
}

Paid connectivity test: returns ok and a server timestamp. Use it to check that your x402 payment flow works end to end. Costs $0.001 USDC per call via x402.

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}

Free health check. Returns service status, version, tool prices, network and the plain-HTTP x402 endpoints.

{
  "type": "object",
  "properties": {},
  "$schema": "http://json-schema.org/draft-07/schema#"
}