Frisk

Name: Frisk
Author: Jiangw2718i

by Jiangw2718iversion 0.0.1i★ –iRuns on your computer

Registry namedev.tryfrisk/frisk

Install

Overview

Description from the maker (original English)

Screen the counterparty of an x402 payment before an agent pays it. Runs offline by default.

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 checksi0 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: Runs on your computer
Transport: stdio
Category: Online shops & payments
You need to fill in: FRISK_API_KEY

Install

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

Before you install

Basic checks: 0 of 1 passed
Runs on your computer with your user’s permissions (files, network, apps).
You fill in yourself: FRISK_API_KEY, FRISK_BASE_URL

Values marked secret are keys to your account. Never share them or paste them into a chat.

You need

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 …”.

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

{
  "mcpServers": {
    "frisk": {
      "command": "npx",
      "args": [
        "-y",
        "frisk-mcp"
      ],
      "env": {
        "FRISK_API_KEY": "your-value",
        "FRISK_BASE_URL": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add frisk --env FRISK_API_KEY=your-value --env FRISK_BASE_URL=your-value -- npx -y frisk-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": {
    "frisk": {
      "command": "npx",
      "args": [
        "-y",
        "frisk-mcp"
      ],
      "env": {
        "FRISK_API_KEY": "your-value",
        "FRISK_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": {
    "frisk": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "frisk-mcp"
      ],
      "env": {
        "FRISK_API_KEY": "your-value",
        "FRISK_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.

This one runs on your computer, and ChatGPT can only connect to servers on the internet. Pick another app.

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

Values you fill in

FRISK_API_KEY secret env
Hosted API key. Without it the server screens entirely offline.
FRISK_BASE_URL env
Override the hosted endpoint. Defaults to https://api.tryfrisk.dev.

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

What it can do

Runs on your computer; the tool list appears in your AI app after you install it.

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 6, 2026

! Caution
Maker matches the repo
The publisher (tryfrisk.dev) is not the repo owner (Jiangw2718i); someone else may have listed it
… 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 applicable
Endpoint responds
This one runs on your computer; there is no internet endpoint
– Not applicable
Sign-in with OAuth
Runs on your computer and uses local settings instead
… Not checked yet
No hidden instructions in tool descriptions
Runs on your computer; we can only read tool lists from internet endpoints

Compared with others in Online shops & paymentsi

More stars than 0% of the other 1744 servers in this category
Published to the registry more recently than 24% of the other 1744 servers in this category
Basic checks equal to or better than 43% of the other 1744 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 Frisk safe?

It passed 0 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?

You need to fill in: FRISK_API_KEY

Does it run on my computer or in the cloud?

It runs on your computer. Your AI app starts it when needed, and data does not pass through the maker’s servers (unless it calls an online service itself).

Is it still maintained?

The GitHub repo last changed –, and the latest version (0.0.1) reached the registry 3 months ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Node.js on your computer.

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 7 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 27 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.

frisk-mcp

An MCP server for Frisk: screen the counterparty of an x402 payment before an agent pays it.

It exposes one tool, screen_payment, which runs Frisk's deterministic checks — address sanity, dynamic-payTo comparison, transport safety, and your own spending policy — and returns allow / review / block with reasons.

Where this belongs, and where it does not

An MCP tool runs when a model decides to call it. A payment check that the model can skip is a weaker guarantee than the same check on the code path that signs the payment.

So:

Use the library — frisk-screen — where the money actually moves. It is MIT, dependency-free, and runs locally.
Use this server for inspection ("is this address safe to pay?"), and for agents that cannot import a library.

Frisk is advisory in both cases: it returns a verdict and your code decides. It never holds funds and cannot stop a payment by itself.

Install

npx frisk-mcp

In any MCP client's server configuration:

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

No API key, no account, no network call: with no configuration the server screens entirely on your machine.

Hosted mode (optional)

Set FRISK_API_KEY to have the same tool answered by the hosted service, which adds reputation-graph signals and returns higher-confidence verdicts:

"mcpServers": { "frisk": { "command": "npx", "args": ["-y", "frisk-mcp"], "env": { "FRISK_API_KEY": "..." } } } }

The hosted tier is in early access — email support@tryfrisk.dev. Everything above works without it.

variable	default	meaning
`FRISK_API_KEY`	unset	Enables hosted screening. Unset means fully offline.
`FRISK_BASE_URL`	`https://api.tryfrisk.dev`	Override the hosted endpoint.

The tool

screen_payment

argument	type	notes
`counterparty`	string, required	The address the agent intends to pay.
`endpoint`	string	URL that quoted the payment; checked for plaintext transport.
`amount`	number	Amount about to be paid.
`asset`	string	Asset symbol, e.g. `USDC`.
`observedPayTo`	string	The `payTo` the endpoint actually returned. If it differs from `counterparty`, that is the dynamic-`payTo` swap.
`strictness`	number 0–1	0 permissive, 1 paranoid. Default 0.3.
`maxPerCall`	number	Spending ceiling for one call.
`allowedAssets`	string[]	Assets the agent may pay in.

Returns verdict, trustScore, confidence, reasons, policyHits, source (lite or hosted), and allowed.

What it does not do

It does not detect Sybil clusters, and offline it has no view of an address's history — lite screening always reports "low" confidence for that reason. It also cannot repair the protocol underneath a payment: replay, settlement races, and facilitator trust live in x402 itself, not in the request being signed. Those limits are discussed in Five ways an x402 payment can go wrong.

License

MIT

Frisk

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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

frisk-mcp

Where this belongs, and where it does not

Install

Hosted mode (optional)

The tool

What it does not do

License