ProvenPaid

Name: ProvenPaid
Author: justinsmithphd

by justinsmithphdversion 0.2.0i★ –iRuns on your computer

Registry namecom.provenpaid/mcp

Install

Overview

Description from the maker (original English)

Check an x402 endpoint before your agent pays it: challenge validity and on-chain payer evidence.

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
UsageiVery new↓ 19/wk · ★ –

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: Crypto & blockchain
You need to fill in: PROVENPAID_WALLET_PRIVATE_KEY

Install

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

Before you install

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

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

You need

PyPIPython’s uv installed (for the uvx 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": {
    "provenpaid": {
      "command": "uvx",
      "args": [
        "provenpaid-mcp"
      ],
      "env": {
        "PROVENPAID_WALLET_PRIVATE_KEY": "your-value",
        "PROVENPAID_DAILY_LIMIT": "your-value",
        "PROVENPAID_MAX_PRICE_USD": "your-value"
      }
    }
  }
}

Run this in your terminal

claude mcp add provenpaid --env PROVENPAID_WALLET_PRIVATE_KEY=your-value --env PROVENPAID_DAILY_LIMIT=your-value --env PROVENPAID_MAX_PRICE_USD=your-value -- uvx provenpaid-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": {
    "provenpaid": {
      "command": "uvx",
      "args": [
        "provenpaid-mcp"
      ],
      "env": {
        "PROVENPAID_WALLET_PRIVATE_KEY": "your-value",
        "PROVENPAID_DAILY_LIMIT": "your-value",
        "PROVENPAID_MAX_PRICE_USD": "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": {
    "provenpaid": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "provenpaid-mcp"
      ],
      "env": {
        "PROVENPAID_WALLET_PRIVATE_KEY": "your-value",
        "PROVENPAID_DAILY_LIMIT": "your-value",
        "PROVENPAID_MAX_PRICE_USD": "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

PROVENPAID_WALLET_PRIVATE_KEY secret env
Optional. Private key of a dedicated low-balance wallet holding USDC on Base, used only to sign payments after the 10 free checks. Not needed to try it.
PROVENPAID_DAILY_LIMIT env
Maximum paid checks per UTC day (default 20).
PROVENPAID_MAX_PRICE_USD env
Refuse checks priced above this (default 0.01, hard ceiling 0.10).

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 9, 2026

✓ Pass
Maker matches the repo
The registry name was verified against the domain provenpaid.com (the registry checks domain ownership)
… 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 Crypto & blockchaini

More stars than 0% of the other 1622 servers in this category
Published to the registry more recently than 62% of the other 1622 servers in this category
Basic checks equal to or better than 100% of the other 1622 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 ProvenPaid 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?

You need to fill in: PROVENPAID_WALLET_PRIVATE_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 (0.2.0) reached the registry 29 days ago.

Which apps can use it?

Apps that support MCP, such as Claude Desktop, Claude Code, Cursor and VS Code. You also need Python (uv) on your computer.

What can I use instead?

In the same category: Nftdata MCP, onchaincheck, Bvcc Agent Wallet

Alternatives

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

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

Nftdata MCP

OpenSea NFT data, paid per request in USDC on Base via x402 (default) or MPP.

by Nomad07Early↓ 735/wkUpdated today

Runs on your computer

Install

onchaincheck

100+ pay-per-call tools: token risk, wallet sanctions screening, onchain data, web, company, AI

by lx1112EarlyUpdated today

Runs in the cloud

Install

Bvcc Agent Wallet

Non-custodial BVCC Agent Wallet on-chain for AI agents: balances, transfers, approvals, swaps.

by blockventurechaincapital-cryptoEarly↓ 622/wkUpdated today

Runs on your computer✓ blockventurechaincapital.com

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.

provenpaid-mcp

Give your agent a pre-payment check for paid x402 endpoints. Evidence before you pay.

ProvenPaid checks an x402 endpoint before your agent relies on it: is its payment challenge valid, and do real wallets actually pay it on-chain, come back, and how concentrated are payments? This MCP server exposes that check as a tool. The first 10 checks are free, with no wallet and no setup. After that it pays automatically, about $0.01 in USDC on Base per check, from a wallet you control.

Use it once before relying on an unfamiliar endpoint, not before every call.

Tools

Tool	Cost	What it does
`check_x402_endpoint(url)`	first 10 free, then about $0.01	Validates the endpoint's x402 challenge and reports public on-chain evidence for its receiving address: distinct payers, repeat-payer share, payer concentration, coverage.
`provenpaid_methodology()`	free	How each signal is computed, what is not verified, and when a check is charged.
`provenpaid_status()`	free	Free checks left, paying wallet address, network, price cap and paid checks left today.

You are not charged when the URL is invalid or unsafe, is not an x402 endpoint, or offers no payment option in USDC on Base. Results are evidence, not a verdict: ProvenPaid does not verify service quality or that an endpoint controls its receiving address.

Install

Requires Python 3.11+. With uv:

uvx provenpaid-mcp

or pip install provenpaid-mcp.

Try it free (no wallet)

"mcpServers": { "provenpaid": { "command": "uvx", "args": ["provenpaid-mcp"] } } }

On first run it creates a local identity key (~/.provenpaid-mcp/identity.key, owner-only). The key holds no funds; it only lets ProvenPaid count your 10 free checks. Only checks that return evidence count.

Keep going after the free checks

Add a dedicated, low-balance wallet:

"mcpServers": { "provenpaid": { "command": "uvx", "args": ["provenpaid-mcp"], "env": { "PROVENPAID_WALLET_PRIVATE_KEY": "0x...", "PROVENPAID_DAILY_LIMIT": "20" } } } }

Wallet safety

Use a dedicated wallet holding only a few dollars of USDC on Base. Never use a wallet with meaningful funds.
The key stays on your machine, in memory only. It is never logged, returned by a tool, or sent anywhere; only signed payment authorizations leave the process.
No ETH is needed: the payment facilitator pays network fees.

Guardrails enforced before anything is signed:

Setting	Default	Meaning
`PROVENPAID_MAX_PRICE_USD`	`0.01`	Refuse any check priced above this (hard ceiling `0.10`).
`PROVENPAID_DAILY_LIMIT`	`20`	Maximum paid checks per UTC day, persisted across restarts.
`PROVENPAID_NETWORK`	`eip155:8453`	Pay only on this network, only in its USDC. `eip155:84532` for Base Sepolia testing.
`PROVENPAID_API_URL`	`https://api.provenpaid.com`	Must be https.
`PROVENPAID_STATE_DIR`	`~/.provenpaid-mcp`	Where the daily counter is kept.

How it works

The server calls GET https://api.provenpaid.com/v1/check?url=.... The API answers HTTP 402 with x402 payment requirements; the official x402 SDK signs a single-use USDC authorization within the guardrails above and retries. Settlement happens only when the check delivers evidence. Methodology: https://api.provenpaid.com/methodology

License

MIT

ProvenPaid

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 Crypto & blockchaini

Common questions

Alternatives

Nftdata MCP

onchaincheck

Bvcc Agent Wallet

README from the maker

provenpaid-mcp

Tools

Install

Try it free (no wallet)

Keep going after the free checks

Wallet safety

How it works

License