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x402 Agent Tools

com.onrender.x402-markdown/agent-toolsx402-markdown.onrender.comstreamable-httpv1.4.1Scanned

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

6 tools: 3 change things and 3 only read.

Tools: 0 delete, 0 irreversible, 3 write, 3 read.
  • Reads private data · 0
  • Reads text others write · 6
  • Can send data out · 4
  • No findings

Anlyon alternative

3 of these tools change something. Run those as governed actions.

Declare what an action changes, and Anlyon puts it under a shared limit, binds every approval to the exact request, and grades the outcome. It works on any HTTPS API you can describe as an action.

Anlyon does not run, proxy or govern this MCP server. A tool your own code calls directly is not routed through Anlyon and is not governed by it.

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Tools

Grouped by what each tool does, most consequential first. Open one for its reasons and full description; descriptions are the publisher's own words.

6 tools

Changes things 3Claude Code: ask
  • crawl_permissionUse 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.Reads text others writeCan send data outNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • untrusted-inputThe name "crawl_permission" says "crawl": it reads web pages, which anyone can write.
    • outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: AI crawl permission check (robots.txt / ai.txt / TDMRep / noai) ($0.005)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • email_checkUse 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 (in…Reads text others writeNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: Email address check ($0.005)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • url_metaUse 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 da…Reads text others writeCan send data outNo findings

    Why it is in this group

    • Nothing in its name or description says what it does, so it is counted as a write.
    • The server marks it read-only (readOnlyHint: true), but an annotation never lowers a class.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: URL metadata / link preview ($0.005)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
Only reads 3Show 3 read-only tools
  • json_validateUse 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 t…Reads text others writeNo findings

    Why it is in this group

    • The name "json_validate" says "validate": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: JSON validate & repair ($0.005)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • read_page_chunksSame 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).Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "read_page_chunks" says "read": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • untrusted-inputThe input takes a URL (input.url), and the tool reads it: it reads web pages, which anyone can write.
    • outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.

    Claude Code: ask, because it is tagged outbound.

    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: Read a web page as RAG chunks with signed receipt ($0.02)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true
  • read_page_markdownUse instead of fetching raw HTML when you need a public page's text.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "read_page_markdown" says "read": a word for reading.

    What it can reach

    • untrusted-inputThe server marks it openWorldHint: true: it reaches things outside the server's own data.
    • untrusted-inputThe description's first sentence says "html": it reads web pages, which anyone can write.
    • untrusted-inputThe input takes a URL (input.url), and the tool reads it: it reads web pages, which anyone can write.
    • outboundThe input takes a URL (input.url): a request to a URL can carry data to whoever runs it.

    Claude Code: ask, because it is tagged outbound.

    Description, as the server wrote it
    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.

    Annotations the server declares

    • title: Read a web page as Markdown ($0.005)
    • readOnlyHint: true
    • destructiveHint: false
    • idempotentHint: true
    • openWorldHint: true

This is not a safety rating, and no finding is not a safety guarantee. The groups and findings come from fixed checks of the tool definitions the server returned on the date shown, not from its code or what it does when called. How the checks work.

Exfil surface

Which tools read private data, which read text someone else can write, and which can send data out. One of each is a path a prompt injection can use.

No private-data, untrusted-input, outbound path in this server alone: no tool is tagged private-data.

Reads private data0
Reads files, mail, messages, databases, secrets, calendars or repositories.
Reads text others write6
Brings in text someone else can write: web pages, inbound email, messages, issues and comments.
Can send data out4
Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.

Other servers in the same agent add their own tools to these paths. Audit your whole setup to see them together.

Findings

Matches of fixed checks, with the text they matched.

No check matched anything in these tool definitions. That is not a safety guarantee.

History

Changes to its tool definitions and to its remote endpoint, newest first.

No change seen yet. Its tools are rescanned every day, and a remote endpoint is looked at once a week.

All changes to this server

Install

Pinned to version 1.4.1. Values in angle brackets are yours to fill in.

claude mcp add --transport http agent-tools https://x402-markdown.onrender.com/mcp
claude mcp add --transport http agent-tools https://x402-markdown.onrender.com/mcp

Run in a terminal.

Claude Code permissions

Allow the reads, ask before a change or a way out, deny the deletes. Paste into .claude/settings.json.

.claude/settings.json
{
  "permissions": {
    "allow": [
      "mcp__agent-tools__json_validate"
    ],
    "ask": [
      "mcp__agent-tools__read_page_markdown",
      "mcp__agent-tools__read_page_chunks",
      "mcp__agent-tools__email_check",
      "mcp__agent-tools__crawl_permission",
      "mcp__agent-tools__url_meta"
    ],
    "deny": []
  }
}

Tools that only read are allowed, tools that change things ask first, tools that delete or cancel are denied. A read that can send data out (it takes a URL, say) asks first too. It assumes the server is installed as agent-tools. Review it before you use it.

Capability tags behind 6 rules
  • mcp__agent-tools__read_page_markdown untrusted-input, outbound
  • mcp__agent-tools__read_page_chunks untrusted-input, outbound
  • mcp__agent-tools__email_check untrusted-input
  • mcp__agent-tools__json_validate untrusted-input
  • mcp__agent-tools__crawl_permission untrusted-input, outbound
  • mcp__agent-tools__url_meta untrusted-input, outbound

Pin

Keep the decision: fail CI when the tools change, follow every change, or show a badge.

Pin in CI

Fail a build when the tools you reviewed are not the tools the server serves today.

curl -s "https://anlyon.dev/api/v1/servers/com.onrender.x402-markdown/agent-tools/verify?hash=98ce62f00dd54534e5a63216258e5bde14c35b071f117d8e4c8a03308f13708a" | jq -e '.changed == false'

Pinned hash 98ce62f00dd5, from Oct 29, 2026, 08:18 UTC.

Watch

Get told when its tools change: a new tool, a new description, a new class.

https://anlyon.dev/servers/com.onrender.x402-markdown/agent-tools/changes.xml

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anlyon.dev badge for com.onrender.x402-markdown/agent-tools
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Source: MCP Registry. Synced Oct 29, 2026, 08:17 UTC.