x402 Agent Tools

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Pay-per-call web reader (Markdown/RAG chunks) and agent utilities; x402 USDC on Base.

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crawl_permission Read-only

Use when: Before fetching, quoting, summarizing or training on a web page with an automated agent: find out whether the site opts out of your crawler token or of AI use. Check robots.txt (RFC 9309) for your crawler token (ua=GPTBot, ClaudeBot, CCBot, ... or *), plus ai.txt, TDMRep and X-Robots-Tag/meta noai, before fetching or training on a URL. Returns verdict allowed|disallowed|unclear with reasons. Not a legal opinion. $0.005 USDC per successful call via x402 (USDC on eip155:8453); failed calls are not charged.

urlstring, required

Public http(s) URL you intend to fetch or use

uastring

robots.txt product token of your crawler (GPTBot, ClaudeBot, CCBot, PerplexityBot, Google-Extended, ...) or * (default)

Tools (6)

crawl_permission

read-only

Argument	Type	Description
ua	string	robots.txt product token of your crawler (GPTBot, ClaudeBot, CCBot, PerplexityBot, Google-Extended, ...) or * (default)
url*	string	Public http(s) URL you intend to fetch or use

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "ua": {
      "type": "string",
      "default": "*",
      "pattern": "^(\\*|[A-Za-z0-9][A-Za-z0-9_.-]{0,63})$",
      "maxLength": 64,
      "description": "robots.txt product token of your crawler (GPTBot, ClaudeBot, CCBot, PerplexityBot, Google-Extended, ...) or * (default)"
    },
    "url": {
      "type": "string",
      "maxLength": 2048,
      "description": "Public http(s) URL you intend to fetch or use"
    }
  },
  "additionalProperties": false
}

email_check

Use when: Before sending email, creating a contact/CRM record or accepting a sign-up: find out whether the address can receive mail and whether it is disposable, a role mailbox (info, support, sales...) or a free provider. Check an email address: syntax, MX/null-MX, SPF, DMARC, disposable, role and free-provider flags, verdict. $0.005 USDC per successful call via x402 (USDC on eip155:8453); failed calls are not charged.

read-only

Argument	Type	Description
email*	string	Email address to check

Input schema (JSON)

{
  "type": "object",
  "required": [
    "email"
  ],
  "properties": {
    "email": {
      "type": "string",
      "maxLength": 254,
      "description": "Email address to check"
    }
  },
  "additionalProperties": false
}

json_validate

Use when: After an LLM, tool or API returns structured output and before you pass it on: check it against the JSON Schema the next step expects, and optionally repair broken JSON text (trailing commas, code fences, single quotes) first. Validate JSON against a JSON Schema (draft-07/2019-09/2020-12), optionally repairing broken LLM JSON first. $0.005 USDC per successful call via x402 (USDC on eip155:8453); failed calls are not charged.

read-only

Argument	Type	Description
data*	any	JSON text (string) to parse/repair, or any JSON value to validate as-is
repair	boolean	Repair broken JSON text before validating (default false)
schema	object	JSON Schema (draft-06/07 default, 2019-09 or 2020-12 via $schema). Omit to only check/repair syntax.

Input schema (JSON)

{
  "type": "object",
  "required": [
    "data"
  ],
  "properties": {
    "data": {
      "description": "JSON text (string) to parse/repair, or any JSON value to validate as-is"
    },
    "repair": {
      "type": "boolean",
      "description": "Repair broken JSON text before validating (default false)"
    },
    "schema": {
      "type": "object",
      "description": "JSON Schema (draft-06/07 default, 2019-09 or 2020-12 via $schema). Omit to only check/repair syntax."
    }
  },
  "additionalProperties": false
}

read_page_chunks

Same as read_page_markdown plus heading-aware chunks (heading path, size, token estimate, sha256) and an Ed25519-signed receipt (public key: /.well-known/x402-receipt-key). $0.02 USDC per successful read via x402 (Base); failed reads are not charged.

read-only

Argument	Type	Description
url*	string	Public http(s) URL of the page to read
links	string	none: remove link and image URLs, keep the visible text (fewer tokens). No extra charge
query	string	What you are looking for. Returns only the top_k most relevant passages (BM25) instead of the whole page, with score and position. No extra charge
top_k	integer	With query: how many passages to return (fewer may come back when fewer contain a query term)
usd_per_mtok	number	Your model's input price in USD per million tokens, used only for savings.est_saved_usd (default 2)

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "description": "Public http(s) URL of the page to read"
    },
    "links": {
      "enum": [
        "keep",
        "none"
      ],
      "type": "string",
      "default": "keep",
      "description": "none: remove link and image URLs, keep the visible text (fewer tokens). No extra charge"
    },
    "query": {
      "type": "string",
      "maxLength": 500,
      "minLength": 1,
      "description": "What you are looking for. Returns only the top_k most relevant passages (BM25) instead of the whole page, with score and position. No extra charge"
    },
    "top_k": {
      "type": "integer",
      "default": 5,
      "maximum": 20,
      "minimum": 1,
      "description": "With query: how many passages to return (fewer may come back when fewer contain a query term)"
    },
    "usd_per_mtok": {
      "type": "number",
      "maximum": 1000,
      "description": "Your model's input price in USD per million tokens, used only for savings.est_saved_usd (default 2)",
      "exclusiveMinimum": 0
    }
  },
  "additionalProperties": false
}

read_page_markdown

Use instead of fetching raw HTML when you need a public page's text. Returns the main content as clean Markdown plus title, byline, excerpt, lang, site_name, published_time, word/token estimate, content sha256 and a savings token estimate. Optional query (+top_k) returns only the most relevant passages (BM25) with score and position; links=none drops link URLs. $0.005 USDC per successful read via x402 (Base); failed reads are not charged.

read-only

Argument	Type	Description
url*	string	Public http(s) URL of the page to read
links	string	none: remove link and image URLs, keep the visible text (fewer tokens). No extra charge
query	string	What you are looking for. Returns only the top_k most relevant passages (BM25) instead of the whole page, with score and position. No extra charge
top_k	integer	With query: how many passages to return (fewer may come back when fewer contain a query term)
format	string	markdown ($0.005) or chunks ($0.02: + heading-aware chunks + signed receipt)
usd_per_mtok	number	Your model's input price in USD per million tokens, used only for savings.est_saved_usd (default 2)

Input schema (JSON)

url_meta

Use when: Before opening, citing or paying to read a link: confirm it resolves (final URL after redirects, HTTP status, dead links) and get its title, description, site name and dates cheaply. For the full text use /v1/read. Cheap link check before opening, citing or paying to read a URL: final URL after redirects, HTTP status (dead links), title, description, lang, canonical, siteName, og/twitter tags, favicon, JSON-LD, publishedAt. No body text (use /v1/read for that). $0.005 USDC per successful call via x402 (USDC on eip155:8453); failed calls are not charged.

read-only

Argument	Type	Description
url*	string	Public http(s) URL to inspect

Input schema (JSON)

{
  "type": "object",
  "required": [
    "url"
  ],
  "properties": {
    "url": {
      "type": "string",
      "maxLength": 2048,
      "description": "Public http(s) URL to inspect"
    }
  },
  "additionalProperties": false
}