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Agent Deals

io.github.gmahar82-stack/agent-dealsgmahar82-stackstreamable-httpv1.0.0Scanned

Pay less for x402 APIs: free pre-payment checks, cheapest working service finder, web/PDF reader.

5 tools: 1 do something that can't be undone, 1 change things and 3 only read.

Tools: 0 delete, 1 irreversible, 1 write, 3 read.
  • Reads private data · 0
  • Reads text others write · 5
  • Can send data out · 4
  • 1 finding

Tools listed without sign-in. Remote posture

Anlyon alternative

2 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.

5 tools

Can't be undone 1Claude Code: ask
  • preflight_x402_paymentFREE.Reads text others writeCan send data out1 finding

    Why it is in this group

    • The name "preflight_x402_payment" says "payment": a word that usually means money moves, which cannot be taken back.
    • 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.

    Findings

    • Warn

      The server marks "preflight_x402_payment" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

      Matched text

      annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "preflight_x402_payment" says "payment": a word that usually means money moves, which cannot be taken back.

      What this check looks for
    Description, as the server wrote it
    FREE. Run this before paying any x402 (HTTP 402) service. Pass the service URL and the PAYMENT-REQUIRED value it sent you (or price_usd and pay_to). Returns GO / CAUTION / STOP with reasons: is the service working, is the price fair (vs its public listing, what our monitor saw, and similar services), is the wallet it asks you to pay safe and the one it normally uses?

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
Changes things 1Claude Code: ask
  • check_x402_serviceFREE.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
    FREE. Before paying an x402 (HTTP 402) API, check it: is it up right now, does its real price match its listing, and is there a cheaper service that does the same job? Covers ~25,000 paid agent APIs, re-checked continuously.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
Only reads 3Show 3 read-only tools
  • find_cheapest_x402_serviceDescribe what you need; get the cheapest WORKING paid APIs for it, ranked by live price, uptime and speed, with example inputs.Reads text others writeNo findings

    Why it is in this group

    • The name "find_cheapest_x402_service" says "find": 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
    Describe what you need; get the cheapest WORKING paid APIs for it, ranked by live price, uptime and speed, with example inputs. 20 free calls per day per client, then $0.002 per call via x402 (USDC on Base).

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • get_page_metadataTitle, description, canonical URL, language, site name, author, publish date, image and JSON-LD of a public page.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "get_page_metadata" says "get": 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 "url": 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
    Title, description, canonical URL, language, site name, author, publish date, image and JSON-LD of a public page. $0.002 per call via x402.

    Annotations the server declares

    • readOnlyHint: true
    • openWorldHint: true
  • read_web_pageFetch a public web page or PDF and return clean Markdown of the main content, plus title, author, date, JSON-LD and links.Reads text others writeCan send data outNo findings

    Why it is in this group

    • The name "read_web_page" 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 name "read_web_page" says "read" and "web": it reads web pages, which anyone can write.
    • untrusted-inputThe description's first sentence says "fetch" and "web": 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
    Fetch a public web page or PDF and return clean Markdown of the main content, plus title, author, date, JSON-LD and links. $0.003 per call via x402. Failed reads are not charged.

    Annotations the server declares

    • readOnlyHint: 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 write5
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.

Remote posture

What anyone on the internet sees at the remote endpoint: an anonymous initialize and tools/list, and the public OAuth metadata.

Tools listed without sign-in

Looked at Oct 22, 2026, 14:59 UTC, unchanged since Oct 22, 2026. No credentials were sent and no tool was called. What is looked at.

Reachable
yes
HTTP status of an anonymous initialize
200
tools/list served without credentials
yes
Tools that change things, listed without credentials
2
Protocol version
2025-06-18
WWW-Authenticate on 401
not observed
resource_metadata in WWW-Authenticate
not observed
RFC 9728 protected resource metadata
not observed
Authorization servers
not observed
Legacy HTTP+SSE transport
no
Dynamic client registration
not observed
Client ID metadata documents
not observed
  • HighThe whole server

    The endpoint served tools/list without credentials, and the list has 2 tools that change things (1 irreversible, 1 write). Whether a call also works without credentials was not tested: tools are never called.

    Matched text

    https://agent-deals.gm-tools.workers.dev/mcp: tools/list returned 5 tools to an anonymous client, including preflight_x402_payment (irreversible), check_x402_service (write)

    What this check looks for

Findings

Matches of fixed checks, with the text they matched.

1 warn
  • Warnpreflight_x402_payment

    The server marks "preflight_x402_payment" read-only (readOnlyHint: true), and its own name, description or input give the class "irreversible".

    Matched text

    annotations: {"readOnlyHint":true,"openWorldHint":true}; The name "preflight_x402_payment" says "payment": a word that usually means money moves, which cannot be taken back.

    What this check looks for

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 1.0.0. Values in angle brackets are yours to fill in.

claude mcp add --transport http agent-deals https://agent-deals.gm-tools.workers.dev/mcp
claude mcp add --transport http agent-deals https://agent-deals.gm-tools.workers.dev/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-deals__find_cheapest_x402_service"
    ],
    "ask": [
      "mcp__agent-deals__preflight_x402_payment",
      "mcp__agent-deals__check_x402_service",
      "mcp__agent-deals__read_web_page",
      "mcp__agent-deals__get_page_metadata"
    ],
    "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-deals. Review it before you use it.

Capability tags behind 5 rules
  • mcp__agent-deals__preflight_x402_payment untrusted-input, outbound
  • mcp__agent-deals__check_x402_service untrusted-input, outbound
  • mcp__agent-deals__find_cheapest_x402_service untrusted-input
  • mcp__agent-deals__read_web_page untrusted-input, outbound
  • mcp__agent-deals__get_page_metadata 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/io.github.gmahar82-stack/agent-deals/verify?hash=9e56b1a3ab13c65e4876bf2b5e4357da8fcb123563703421c2c1fa8363f00025" | jq -e '.changed == false'

Pinned hash 9e56b1a3ab13, from Oct 21, 2026, 19:29 UTC.

Watch

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

https://anlyon.dev/servers/io.github.gmahar82-stack/agent-deals/changes.xml

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Source: MCP Registry. Synced Oct 21, 2026, 18:34 UTC.