Address Poisoning Check

Name: Address Poisoning Check
Author: devx-agent

by devx-agentversion 1.1.0i★ –iComputer or cloud

Registry nameio.github.devx-agent/address-poisoning-check

Install

Overview

Description from the maker (original English)

Before sending crypto, check the recipient for address poisoning: lookalikes and bad checksums

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 checksi3 of 3 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: Other

Install

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

Before you install

Basic checks: 3 of 3 passed
Runs on the maker’s server: what you ask it goes through their server.
Can do 2 things (tools) check_recipient_lookalike, onchain_check_info
The registry lists no key to fill in.

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://address-poisoning-check.nextill-pos.workers.dev/mcp

Or run it on your computer

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

{
  "mcpServers": {
    "address-poisoning-check": {
      "command": "npx",
      "args": [
        "-y",
        "devx-address-poisoning-check",
        "mcp"
      ]
    }
  }
}

Run this in your terminal

claude mcp add --transport http address-poisoning-check https://address-poisoning-check.nextill-pos.workers.dev/mcp

Or run it on your computer

claude mcp add address-poisoning-check -- npx -y devx-address-poisoning-check mcp

Open in Cursor

Or copy the settings yourself

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

{
  "mcpServers": {
    "address-poisoning-check": {
      "url": "https://address-poisoning-check.nextill-pos.workers.dev/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": {
    "address-poisoning-check": {
      "command": "npx",
      "args": [
        "-y",
        "devx-address-poisoning-check",
        "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": {
    "address-poisoning-check": {
      "type": "http",
      "url": "https://address-poisoning-check.nextill-pos.workers.dev/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": {
    "address-poisoning-check": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "devx-address-poisoning-check",
        "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://address-poisoning-check.nextill-pos.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

Tool names and descriptions exactly as the server reported them on Nov 6, 2026. The maker wrote them, not us; we show them as plain text.

check_recipient_lookalike
Free, offline, read-only: before sending crypto, check whether the recipient address is a lookalike (same first/last hex characters, different middle) of any address you trust, and whether its EIP-55 checksum is valid. Address poisoning stole $76M+ in 12 months by planting such l
onchain_check_info
How to buy the on-chain check (scans the sender's real transfer history on Ethereum/Base/Avalanche for poisoning transfers and lookalikes) via x402 for 0.005 USDC. Does not pay.

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 devx-agent, 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
✓ Pass
Endpoint responds
Responded in 32 ms (HTTP 200)
– Not applicable
Sign-in with OAuth
No sign-in needed
✓ Pass
No hidden instructions in tool descriptions
Read 2 tool descriptions and found no hidden instructions to the AI

Compared with others in Otheri

More stars than 0% of the other 32583 servers in this category
Published to the registry more recently than 83% of the other 32583 servers in this category
Basic checks equal to or better than 100% of the other 32583 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 Address Poisoning Check safe?

It passed 3 of 3 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 (1.1.0) reached the registry 7 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: Spec Driven Development, Remote Desktop Commander, sync. labs

Alternatives

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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.

Address Poisoning Check

Is this the address you meant? Address poisoning plants a lookalike address (same first and last characters, different middle) in a wallet's history with a zero-value, dust or fake-token transfer, and waits for the owner (or their AI agent) to copy it. Bitquery counted about $76M stolen on Ethereum alone in the 12 months to July 2026.

This repo has three pieces, all read-only (we never ask for keys and never move funds):

	What	Cost
CLI / stdio MCP `devx-address-poisoning-check`	Offline: is the recipient a lookalike of any address you trust? Is its EIP-55 checksum valid? Nothing leaves your machine.	free
Remote MCP `https://address-poisoning-check.nextill-pos.workers.dev/mcp`	Same offline check as a hosted MCP tool	free
HTTP API `GET /v1/check?from= &to=`	On-chain: scans the sender's real transfer history (Ethereum + Base, optional Avalanche) and flags lookalikes of real counterparties, zero-value / dust / fake-token poisoning transfers (with tx hashes), recipients that only ever appeared through such transfers, and senders that were already poisoned. Returns `ok \	caution \	danger` and the address you probably meant.	0.005 USDC via x402 on Base

Live: https://address-poisoning-check.nextill-pos.workers.dev

CLI

npx devx-address-poisoning-check 0xd9A1C3788D81257612E2581A6ea0aDa244853a91 --known 0xd9A1b0B1e1aE382DbDc898Ea68012FfcB2853a91

DANGER: Looks like 0xd9a1...3a91 (same first 4 / last 6 hex chars) but is a different address. Classic address-poisoning lookalike.

Exit code 2 on danger, so it can gate scripts and agent payment flows.

MCP

Claude Desktop / Cursor (stdio):

{ "mcpServers": { "address-poisoning-check": { "command": "npx", "args": ["-y", "devx-address-poisoning-check", "mcp"] } } }

Or remote (streamable HTTP): https://address-poisoning-check.nextill-pos.workers.dev/mcp

Tools: check_recipient_lookalike (free), onchain_check_info (how to buy the on-chain check; does not pay).

Paid on-chain check (x402)

GET https://address-poisoning-check.nextill-pos.workers.dev/v1/check?from=0x...&to=0x...[&chains=ethereum,base,avalanche]

Answers 402 with an x402 v1 body (X-PAYMENT, network base) and a v2 PAYMENT-REQUIRED header (PAYMENT-SIGNATURE, eip155:8453). Both work.
5000 atomic USDC (0.005 USDC) to 0xB3cDDccEe6B150c8efFD55B961afc0Ecefe7f247, settled through the Coinbase CDP facilitator, listed in the CDP x402 Bazaar.
Settled only after the report is produced; bad input or data-source errors are not charged.
Data: Ethereum/Avalanche via the Routescan explorer API (last 300 token transfers + 150 transactions of the sender); Base via the Coinbase CDP SQL API (last 14 days of all ERC-20 transfers, including unknown/fake tokens), falling back to public RPC logs for a shorter window. Typical paid response: about 1-2 s. Data collection has a 3.5 s budget; if a source is slow you still get a report with "partial": true and the scanned window stated per chain in chains[].window. It is a heuristic over a window of public data: always confirm the full address with the payee.

Example (the May 2024 $68M WBTC case): from=0x1E227979f0b5BC691a70DEAed2e0F39a6F538FD5&to=0xd9A1C3788D81257612E2581A6ea0aDa244853a91 returns danger / possibly_already_poisoned: the victim did send real value to that address, but it first appeared in their history through a zero-value transfer.

OpenAPI: /openapi.json · Terms: /terms

Related DevX tools

7702 Sweeper Check: is an EIP-7702 sweeper delegation set on a wallet?
Crypto Link Check: is a crypto URL a phishing / drainer lookalike?
Repo Run Check: is a GitHub repo safe to clone and run?

Layout

cli/: npm package devx-address-poisoning-check (CLI + stdio MCP), npm test
worker/: the Cloudflare Worker behind the hosted API (npm run build)

MIT. Made by DevX · madebydevx@gmail.com

Address Poisoning Check

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

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

sync. labs

README from the maker

Address Poisoning Check

CLI

DANGER: Looks like 0xd9a1...3a91 (same first 4 / last 6 hex chars) but is a different address. Classic address-poisoning lookalike.

MCP

Paid on-chain check (x402)

Related DevX tools

Layout