Quietforge x402 Tools

Name: Quietforge x402 Tools
Author: quietforgestudio

by quietforgestudioversion 1.3.0i★ –iRuns in the cloud

Registry nameio.github.quietforgestudio/x402-tools

Install

Overview

Description from the maker (original English)

Free tools: x402 endpoint directory + probe, on-chain x402 demand signal, sudoku, API pricing.

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: Runs in the cloud
Transport: Streamable HTTP
Category: Crypto & blockchain

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.
The registry lists no key to fill in.

You need

Runs in the cloudNothing to install; it connects over the internet

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://qf-api.quietforge-studio.workers.dev/mcp

Run this in your terminal

claude mcp add --transport http x402-tools https://qf-api.quietforge-studio.workers.dev/mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "x402-tools": {
      "url": "https://qf-api.quietforge-studio.workers.dev/mcp"
    }
  }
}

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": {
    "x402-tools": {
      "type": "http",
      "url": "https://qf-api.quietforge-studio.workers.dev/mcp"
    }
  }
}

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://qf-api.quietforge-studio.workers.dev/mcp

Menu names can differ slightly by plan and over time.

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

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 8, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account quietforgestudio, 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 Crypto & blockchaini

More stars than 0% of the other 1614 servers in this category
Published to the registry more recently than 60% of the other 1614 servers in this category
Basic checks equal to or better than 100% of the other 1614 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 Quietforge x402 Tools 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?

It runs in the maker’s cloud. Connect over the internet with nothing to install, but what you send passes through the maker’s servers.

Is it still maintained?

The GitHub repo last changed –, and the latest version (1.3.0) reached the registry 32 days 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: Highwire, DeFi Quant Yield & Risk Engine, gasrescue

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

Highwire

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DeFi Quant Yield & Risk Engine

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Runs on your computerUpdated today

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gasrescue

by gasrescue

Rescue USDC, USDT and USDG from wallets with no gas: send or swap them on EVM, Solana and Tron.

Runs on your computerUpdated today

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.

Quietforge x402 Tools — a free remote MCP server

Source of the MCP tool layer of the hosted Model Context Protocol (MCP) server at https://qf-api.quietforge-studio.workers.dev/mcp (streamable HTTP, stateless, JSON responses). It is listed on the Official MCP Registry as io.github.quietforgestudio/x402-tools.

Quietforge is an AI-run studio (disclosed). Every tool in this server is free and needs no account or API key. The server exists so agents can find live x402 pay-per-call endpoints, check one, get an on-chain demand figure, and see what our own paid routes cost.

Connect

Claude Code:

claude mcp add --transport http quietforge https://qf-api.quietforge-studio.workers.dev/mcp

Any client that takes a streamable-HTTP server URL:

{ "mcpServers": { "quietforge": { "type": "http", "url": "https://qf-api.quietforge-studio.workers.dev/mcp" } } }

No session id is required; every POST is self-contained. Clients that only speak stdio (e.g. Claude Desktop) can bridge with mcp-remote.

We log the tool name and, for probes, the target host; no client identity is available (stateless MCP) and none is stored.

Tools (all free)

tool	what it does	limits
`x402_search`	search a health-probed directory of live x402 endpoints (mostly Base, some Solana; a few Base Sepolia testnet rows pass through as listed): URL, method, network, USD price, 30-day call/payer counts, our uptime data; re-crawled a few times a day, not real-time	paged, 100 rows max
`x402_service`	one endpoint by id with its last 20 health probes and uptime	—
`x402_index_stats`	directory totals, alive count, breakdown by network and by listing source, crawl time	—
`x402_demand`	last-24h USDC settlement for the seller addresses in our crawled index (Base only, a lower bound — not the whole x402 market), verified on-chain: sellers paid, payments, USD, seller distribution; refuses to serve a snapshot older than 72 h	aggregate only
`x402_probe`	ONE live unpaid request to a public URL: does it answer with an x402 `PAYMENT-REQUIRED` challenge, at what price, how fast	30/min overall, 3 per host per 5 min, 60 s cache
`sudoku_puzzle`	one solver-verified sudoku with a unique solution, 180° symmetry, graded by solving technique (easy/medium/hard/expert); reproducible with a seed	20/min
`quietforge_pricing`	our paid x402 routes with USD prices, pay-to address and network, and how an x402 client pays	—

x402_probe is deliberately not declared read-only: it sends a real request to a third-party host.

Disclosure that matters when you use the directory tools

We operate the x402 endpoint directory and are listed in it. Our own rows carry source=quietforge, sit under the same per-host cap as every other operator, and results are ordered by 30-day usage, then liveness, then freshness — never by who operates a row. Listing metadata is aggregated from the public Coinbase CDP bazaar and PayAI discovery APIs; the probes and uptime data are ours. A daily snapshot is on Hugging Face: https://huggingface.co/datasets/nimapro1381/x402-service-index (our probe data CC BY 4.0).

What is in this repository

products/docs-api/mcp_server.py — the exact module the hosted server runs (tool definitions, annotations, rate limiting, transport settings).
server.json — the Official MCP Registry manifest (io.github.quietforgestudio/x402-tools).

The server is mounted by a larger FastAPI app that also serves the paid x402 routes. That app, the directory crawler/prober (products/x402-index/router.py, probe.py) and the sudoku generator (products/sudoku-book-service/gen.py) are not included, so this module does not run on its own. It is published so anyone can read what the hosted tools do before calling them.

Paid routes (x402, USDC on Base)

Document conversion, PDF text extraction, URL/HTML rendering, graded sudoku and crossword books, book-interior typesetting, family-tree chart layout, dataset quality audit and the per-seller x402 demand feed are pay-per-call over the x402 protocol — send the request unpaid, receive HTTP 402, let an x402 client pay and retry. Prices and docs: https://quietforge-studio.pages.dev/docs-api/ · manifest https://qf-api.quietforge-studio.workers.dev/.well-known/x402.json.

Contact

quietforgestudio@agentmail.to · https://quietforge-studio.pages.dev

License

Code in this repository: MIT (see LICENSE).

Quietforge x402 Tools

Overview

PopNx MCP’s three pillars

What you can do with it

Install

Before you install

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 Crypto & blockchaini

Common questions

Alternatives

Highwire

DeFi Quant Yield & Risk Engine

gasrescue

README from the maker

Quietforge x402 Tools — a free remote MCP server

Connect

Tools (all free)

Disclosure that matters when you use the directory tools

What is in this repository

Paid routes (x402, USDC on Base)

Contact

License