Agent Deals

by gmahar82-stack · remote · no sign-in to list tools · v1.0.0 · published by GitHub user gmahar82-stack

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

Final · 1Changes · 1

Compare Registry entry

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

Scanned Oct 21, 2026

Deletes or cancels0Claude Code: deny
Can't be undone1Claude Code: ask: see these tools
Changes things1Claude Code: ask: see these tools
Only reads3Claude Code: allow: see these tools

1 check matched something in the tool definitions. No finding is not a safety guarantee. How the checks work.

claude mcp add --transport http agent-deals https://agent-deals.gm-tools.workers.dev/mcp

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

Tools

Open a tool for its reasons and full description. Descriptions are the publisher's own words, shown as they are.

5 tools

Can't be undone 1Sends, pays, publishes or merges: once done, it cannot be taken back.Claude 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 1Creates or changes something that can be changed back.Claude 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 3Looks things up and changes nothing.Claude Code: allow, ask for 2 outbound

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.; check_x402_service
find_cheapest_x402_service
get_page_metadata
preflight_x402_payment
read_web_page
Can send data out4: Can carry data to people or systems: it sends, posts or publishes, or takes a recipient, channel or URL.; check_x402_service
get_page_metadata
preflight_x402_payment
read_web_page

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.

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: none
RFC 9728 protected resource metadata: none
Authorization servers: none
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

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

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

Keep track

Get told when this server's tools change: a new tool, a new description, a new class.

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

An Atom feed. Works in any feed reader or Slack's RSS app.

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.

Import an OpenAPI spec →

Compare with other servers for the same product.

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

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