Attest

Name: Attest
Author: attestagents

by attestagentsversion 1.0.0i★ –iComputer or cloud

Registry nameio.github.attestagents/attest-mcp

Install

Overview

Description from the maker (original English)

Scan agent payment endpoints (x402, AP2, L402, MPP, 402) for a trust grade A-F before paying.

PopNx MCP’s three pillars

These three are never merged into one score: opinions, measurements and popularity are different things.

User voiceiNo reviews yetReviews open together with accounts in a later step
Our basic checksi1 of 1 passedChecked from public information; code not scanned yet
UsageiNot measured yet★ –

What you can do with it

We have not written a plain-language summary for this one yet. Below are the facts we read from the registry.

Connection: Computer or cloud
Transport: stdio, Streamable HTTP
Category: Online shops & payments

Install

Pick the AI app you use, then copy the settings.

Before you install

Basic checks: 1 of 1 passed
Runs on the maker’s server: what you ask it goes through their server.
You fill in yourself: ATTEST_BASE_URL

You need

Runs in the cloudNothing to install; it connects over the internet
npmNode.js installed (for the npx command)

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

Pick your app above. We remember it, so next time the button says “Install in …”.

Works in Claude on the web, desktop and mobile:

Open Settings → Connectors
Press Add custom connector
Paste the address below and press Add
If it asks you to sign in, sign in with the maker

https://attestagent.org/api/mcp

Or run it on your computer

Open Claude Desktop → Settings → Developer → Edit Config, and paste this into claude_desktop_config.json

{
  "mcpServers": {
    "attest": {
      "command": "npx",
      "args": [
        "-y",
        "attest-mcp"
      ],
      "env": {
        "ATTEST_BASE_URL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add --transport http attest https://attestagent.org/api/mcp

Or run it on your computer

claude mcp add attest --env ATTEST_BASE_URL=your-value -- npx -y attest-mcp

Fill in the empty values before running it.

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "attest": {
      "url": "https://attestagent.org/api/mcp"
    }
  }
}

Or run it on your computer

Open in Cursor

Or copy the settings yourself

Paste into .cursor/mcp.json in your project, or ~/.cursor/mcp.json

{
  "mcpServers": {
    "attest": {
      "command": "npx",
      "args": [
        "-y",
        "attest-mcp"
      ],
      "env": {
        "ATTEST_BASE_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "attest": {
      "type": "http",
      "url": "https://attestagent.org/api/mcp"
    }
  }
}

Or run it on your computer

Open in VS Code

Or copy the settings yourself

Paste into .vscode/mcp.json in your project

{
  "servers": {
    "attest": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "attest-mcp"
      ],
      "env": {
        "ATTEST_BASE_URL": "your-value"
      }
    }
  }
}

Your browser asks to open the app, then the app shows the settings and asks you to confirm. Key values are left empty for you to fill in.

ChatGPT connects only to servers on the internet:

Open ChatGPT on the web → Settings → Connectors (Apps)
Press Create or Add (some plans need Developer mode under Advanced first)
Paste the address below, give it a name and save
If it asks you to sign in, sign in with the maker

https://attestagent.org/api/mcp

Menu names can differ slightly by plan and over time.

Your choice stays on this device in a cookie; no account needed.

Values you fill in

ATTEST_BASE_URL env
Override the Attest API base URL. Defaults to https://attestagent.org. Only needed for self-hosting or testing.

These settings are generated from the maker’s registry entry. If the README says otherwise, follow the README.

What it can do

We have not read this server’s tool list yet; we check endpoints in rotation.

Basic checksi

We check information anyone can see; we have not read the code. Checks that do not apply are left out of the count. · Checked Nov 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account attestagents, which owns the repo
… Not checked yet
Still maintained
We have not read this repo from GitHub yet
… Not checked yet
Has a licence
We have not read this repo from GitHub yet
… Not checked yet
Endpoint responds
Not checked yet; we check endpoints in rotation
… Not checked yet
Sign-in with OAuth
Not checked yet; we check endpoints in rotation
… Not checked yet
No hidden instructions in tool descriptions
Not checked yet; we read the tool list when we check the endpoint

Compared with others in Online shops & paymentsi

More stars than 0% of the other 2535 servers in this category
Published to the registry more recently than 11% of the other 2535 servers in this category
Basic checks equal to or better than 100% of the other 2535 servers in this category

Compared with every active server in this category in the registry. Stars count only when the publisher owns the repo.

Common questions

Is Attest safe?

It passed 1 of 1 applicable basic checks. We have not read the code. Before adding a key or token, see what access the server asks for and use a key with only the permissions you need.

What keys or codes does it need?

The registry does not list a required key, though some servers ask you to sign in on first use.

Does it run on my computer or in the cloud?

Either way works: install it on your computer or connect to the cloud version.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.0.0) reached the registry 5 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. It connects by URL, so apps that accept remote MCP servers work too, such as ChatGPT in developer mode.

What can I use instead?

In the same category: Spree Commerce: open-source B2B and marketplace ecommerce, Stripe MCP, MCP Cn Commerce

Alternatives

Servers in the same category from other makers, sorted by stars.

Reading a card:★ GitHub starsiThree pillars: reviews · checks · usageiUpdated = latest version published to the registryi

Spree Commerce: open-source B2B and marketplace ecommerce

by spree

Open-source B2B and marketplace ecommerce; new stores include an MCP server for AI agents.

Runs in the cloud★ 15,812BSD-3-ClauseUpdated 8 days ago

Install

Stripe MCP

by stripe

Stripe’s official server lets AI view and manage customers, products, payments and invoices. Connect to Stripe’s cloud and sign in with OAuth.

Runs in the cloud★ 2,043MITUpdated 12 months ago

Install

MCP Cn Commerce

by TonyWang-hub

8 read-only MCP platform entries; support is operation-specific; merchant live acceptance pending

Runs on your computer★ 96MITUpdated 28 days ago

Install

README from the maker

Open the README

Copied from the maker’s repo as written. PopNx MCP has not reviewed or endorsed it. HTML, images and scripts are removed. Links lead off this site.

Attest MCP Server

Trust scanning for agent payments — right inside your AI agent.

attest-mcp is a Model Context Protocol server that lets any MCP-compatible agent (Claude, Cursor, Windsurf, VS Code, and more) scan an agent payment endpoint and get back a letter grade A–F with a clear safety verdict before authorizing a single cent.

It covers the agentic payment protocols in use today: x402, MPP, AP2, L402, and HTTP 402.

Powered by Attest. The scoring engine runs entirely on Attest's servers — this package is a thin client that relays requests, so installing it never exposes any proprietary grading logic.

Why

Autonomous agents are starting to pay for things on their own. A single malicious or misconfigured endpoint can drain funds through impersonation, a blocklisted payout wallet, bait-and-switch pricing, or a broken payment handshake. attest-mcp gives your agent a fast, deterministic safety check it can run as a step in its payment loop.

Tools

Tool	What it does
`attest_scan`	Runs a full scan on a payment endpoint URL and returns a grade (A–F), a composite score (0–100), a verdict, danger flags, price, and a link to the full report. Call this before paying an unfamiliar endpoint.
`attest_grade`	Fast lookup of the most recent grade for a host that has already been scanned. Good for a quick pre-check.

Requirements

Node.js 18 or newer
Any MCP-compatible client

No API key required.

Quick start

Run it directly with npx (no install needed):

npx attest-mcp

The server speaks MCP over stdio, so you normally don't run it by hand — you point your MCP client at it using one of the configs below.

Client setup

Claude Desktop

Edit claude_desktop_config.json (Settings → Developer → Edit Config):

"mcpServers": { "attest": { "command": "npx", "args": ["-y", "attest-mcp"] } } }

Cursor

Add to ~/.cursor/mcp.json (or Settings → MCP → Add new server):

"mcpServers": { "attest": { "command": "npx", "args": ["-y", "attest-mcp"] } } }

Windsurf

Add to ~/.codeium/windsurf/mcp_config.json:

"mcpServers": { "attest": { "command": "npx", "args": ["-y", "attest-mcp"] } } }

VS Code

Add to .vscode/mcp.json in your workspace:

"servers": { "attest": { "command": "npx", "args": ["-y", "attest-mcp"] } } }

Any other MCP client

Use the command npx -y attest-mcp with the stdio transport.

Remote server (no install)

Prefer not to install anything? Attest also runs a hosted MCP server you can connect to over Streamable HTTP:

https://attestagent.org/api/mcp

Point any remote-MCP-capable client at that URL.

Usage example

Once connected, just ask your agent in natural language:

"Before you pay, scan https://api.example.com/paid-resource with Attest."

The agent calls attest_scan and gets back something like:

"host": "api.example.com", "grade": "A", "composite": 95, "danger": false, "verdict": "Valid endpoint, established host.", "priceHuman": "0.01 USDC", "reportUrl": "https://attestagent.org/r/abc-123" }

Configuration

Environment variable	Default	Description
`ATTEST_BASE_URL`	`https://attestagent.org`	Override the Attest API base URL. Only needed for self-hosting or testing.

Security & privacy

No secrets, no accounts, no API keys. The server holds no credentials.
No proprietary logic ships here. Grading happens server-side; this package only relays requests and formats responses.
Inputs are validated before any request is made.
Outbound only. The server makes HTTPS requests to the Attest API and speaks MCP over stdio — it opens no inbound ports.
Scanned URLs and results are logged to Attest's public directory. Do not scan endpoints whose URL or response contains private or sensitive information. See attestagent.org/legal.

Contributing

Issues and pull requests are welcome — see CONTRIBUTING.md.

Attest

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

Or run it on your computer

Or run it on your computer

Or run it on your computer

Or run it on your computer

Values you fill in

What it can do

Basic checksi

Maker matches the repo

Still maintained

Has a licence

Endpoint responds

Sign-in with OAuth

No hidden instructions in tool descriptions

Compared with others in Online shops & paymentsi

Common questions

Alternatives

Spree Commerce: open-source B2B and marketplace ecommerce

Stripe MCP

MCP Cn Commerce

README from the maker

Attest MCP Server

Why

Tools

Requirements

Quick start

Client setup

Claude Desktop

Cursor

Windsurf

VS Code

Any other MCP client

Remote server (no install)

Usage example

Configuration

Security & privacy

Links

Contributing

License