Onchain Data MCP

Name: Onchain Data MCP
Author: madlabs-tech

by madlabs-techversion 0.2.1i★ –iRuns on your computer

Registry nameio.github.madlabs-tech/onchain-data-mcp

Install

Overview

Description from the maker (original English)

Blockchain data for EVM and Solana: balances, tokens, prices, DeFi and RPC via free-tier vendors

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 on your computer
Transport: stdio
Category: Other
You need to fill in: ALCHEMY_API_KEY, HELIUS_API_KEY, COINGECKO_API_KEY, MORALIS_API_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: ALCHEMY_API_KEY, HELIUS_API_KEY, COINGECKO_API_KEY, MORALIS_API_KEY

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

You need

DockerDocker installed

Which app do you use?

ClaudeClaude CodeCursorVS CodeChatGPT

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

Download the maker’s .mcpb file

The link goes to the maker’s own file; we do not host or repackage it. Open the file and Claude Desktop installs it.

Run this in your terminal

claude mcp add onchain-data --env ALCHEMY_API_KEY=your-value --env HELIUS_API_KEY=your-value --env COINGECKO_API_KEY=your-value --env MORALIS_API_KEY=your-value -- docker run -i --rm -e ALCHEMY_API_KEY -e HELIUS_API_KEY -e COINGECKO_API_KEY -e MORALIS_API_KEY ghcr.io/madlabs-tech/onchain-data-mcp:0.2.1 --config-dir /config

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": {
    "onchain-data": {
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "ALCHEMY_API_KEY",
        "-e",
        "HELIUS_API_KEY",
        "-e",
        "COINGECKO_API_KEY",
        "-e",
        "MORALIS_API_KEY",
        "ghcr.io/madlabs-tech/onchain-data-mcp:0.2.1",
        "--config-dir",
        "/config"
      ],
      "env": {
        "ALCHEMY_API_KEY": "your-value",
        "HELIUS_API_KEY": "your-value",
        "COINGECKO_API_KEY": "your-value",
        "MORALIS_API_KEY": "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": {
    "onchain-data": {
      "type": "stdio",
      "command": "docker",
      "args": [
        "run",
        "-i",
        "--rm",
        "-e",
        "ALCHEMY_API_KEY",
        "-e",
        "HELIUS_API_KEY",
        "-e",
        "COINGECKO_API_KEY",
        "-e",
        "MORALIS_API_KEY",
        "ghcr.io/madlabs-tech/onchain-data-mcp:0.2.1",
        "--config-dir",
        "/config"
      ],
      "env": {
        "ALCHEMY_API_KEY": "your-value",
        "HELIUS_API_KEY": "your-value",
        "COINGECKO_API_KEY": "your-value",
        "MORALIS_API_KEY": "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

ALCHEMY_API_KEY secret env
Optional Alchemy key: EVM RPC, token balances and transfers.
HELIUS_API_KEY secret env
Optional Helius key: Solana RPC and token data.
COINGECKO_API_KEY secret env
Optional CoinGecko key: token prices and market data.
MORALIS_API_KEY secret env
Optional Moralis key: wallet history and token data.

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 7, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account madlabs-tech, 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 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 Otheri

More stars than 0% of the other 32700 servers in this category
Published to the registry more recently than 49% of the other 32700 servers in this category
Basic checks equal to or better than 100% of the other 32700 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 Onchain Data MCP 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: ALCHEMY_API_KEY, HELIUS_API_KEY, COINGECKO_API_KEY, MORALIS_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 (0.2.1) reached the registry 42 days ago.

Which apps can use it?

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

What can I use instead?

In the same category: Spec Driven Development, Remote Desktop Commander, Agent Data Tools: Utilities

Alternatives

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

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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.

onchain-data-mcp

Give your AI assistant live blockchain data: wallet balances, payments, prices, scam checks and more. Free to start, no sign-ups needed.

The Claude Desktop button downloads a file you double-click; it has everything inside.

The Cursor and VS Code buttons only add the settings, so install the program first.

onchain-data-mcp is one small program that lets AI apps like Claude, Cursor and VS Code read the blockchain. It works with Ethereum, Base, Arbitrum, Optimism, Polygon, Avalanche, BNB Chain, Robinhood Chain and Solana.

Behind the scenes it asks about 30 data services ("providers") for you. If one is slow, busy or down, it quietly asks the next one. Free services come first, so you can start without paying anything and without any sign-ups.

A few words you will see here:

MCP is a standard way for AI apps like Claude to use outside tools. This program is an "MCP server": a tool your AI app can use.
API key is a free password a data provider gives you when you sign up. You don't need any to start. Adding a couple makes answers faster and more complete.
Wallet address is the public "account number" of a crypto wallet, like 0xd8dA…6045 or 7xKX…9sHc.

What you can do
Quick start
Connect to AI apps
The dashboard
Password and keys
Data providers
Available tools
Real-world examples
Running it for others
Troubleshooting
FAQ
For developers · Security · License

What you can do

Ask your AI assistant questions in plain words. It picks the right tool and gets the answer.

Check wallets. See what coins and tokens a wallet holds, on every chain at once. *"What does wallet 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 hold?"*
Confirm payments. Check that a customer really paid the right amount of USDC to the right address. *"Did transaction 0xabc… on Base pay 25 USDC to my shop address?"*
Stay safe. Check if a token is a scam, if an address is on a sanctions list, or if a stablecoin is losing its value. *"Is this token on Solana a honeypot?"* · *"Is USDT still worth one dollar?"*
Follow the money. Get transaction details, fees, and a bank-style statement for a wallet. *"Show me last week's incoming payments to my wallet, with their dollar value."*
Prices and swaps. Get token prices from several sources, past prices, and swap quotes. *"What's the best price to swap 1 ETH to USDC on Arbitrum right now?"*
Tokenized stocks. Look up stock tokens on Robinhood Chain and their prices. *"What is the price of the Tesla stock token on Robinhood Chain?"*

It only reads data, with one exception: it can send a transaction that you already signed yourself in your own wallet. It never holds your keys and can never move your money on its own.

Quick start

Three steps, about five minutes.

1. Install the program

Pick one. You only need to do this once.

Mac or Linux (open the Terminal app and paste):

curl --proto '=https' --tlsv1.2 -LsSf https://github.com/madlabs-tech/onchain-data-mcp/releases/latest/download/onchain-data-mcp-installer.sh | sh

Windows (open PowerShell and paste):

powershell -ExecutionPolicy Bypass -c "irm https://github.com/madlabs-tech/onchain-data-mcp/releases/latest/download/onchain-data-mcp-installer.ps1 | iex"

Homebrew (Mac or Linux):

brew install madlabs-tech/tap/onchain-data-mcp

Claude Desktop only, no Terminal needed (Mac and Windows): download onchain-data-mcp.mcpb and double-click it. Claude Desktop asks for an optional dashboard password and optional provider keys. You can leave them all empty. Then skip to step 3.

Other ways: Docker, or build it yourself

Docker, for AI apps (Docker is a tool that runs programs in a sealed box):

docker run -i --rm -v onchain-data-mcp-data:/data ghcr.io/madlabs-tech/onchain-data-mcp:latest --config-dir /config

Docker, running in the background with the dashboard at http://127.0.0.1:8787/dashboard:

docker run -d --name onchain-data-mcp -p 127.0.0.1:8787:8787 -v onchain-data-mcp-data:/data -v onchain-data-mcp-config:/config ghcr.io/madlabs-tech/onchain-data-mcp:latest

docker exec onchain-data-mcp onchain-data-mcp password --config-dir /config

Build it yourself (needs Rust 1.90 or newer):

cargo build --release -p onchain-data-mcp

the program is now at target/release/onchain-data-mcp

When it's done, open a new Terminal window and check it works:

onchain-data-mcp --version

The installers put the program in a folder called .cargo/bin inside your home folder (for example /Users/you/.cargo/bin/onchain-data-mcp, or C:\Users\you\.cargo\bin\onchain-data-mcp.exe on Windows).

2. Connect your AI app

Follow the steps for your app in Connect to AI apps below. Then restart the app and ask it something, like *"Which chains can you read?"*

3. Open the dashboard

The dashboard is a control panel in your web browser. While your AI app is open, it runs at http://127.0.0.1:8787/dashboard. It is protected by a password that was made for you. To see it, run this in the Terminal (use the same folder you used in step 2):

onchain-data-mcp password --config-dir ~/.onchain-data-mcp

You'll see something like:

Dashboard: http://127.0.0.1:8787/dashboard

Password: f8460762fe006afc… One-click login: http://127.0.0.1:8787/dashboard#login=f8460762fe006afc… Config folder: /Users/you/.onchain-data-mcp Source: /Users/you/.onchain-data-mcp/dashboard_password

Open the one-click login link and you're in. The Setup guide walks you through the rest: add keys, pick tools, connect.

If you used the Claude Desktop bundle, your folder is ~/.onchain-data-mcp unless you picked another one.

Connect to AI apps

Pick one folder for your settings and use it everywhere. We use ~/.onchain-data-mcp here (a folder called .onchain-data-mcp in your home folder). Replace you with your user name.

Why the full path? Some apps start programs from a different place, so short paths like config end up in the wrong folder. A full path always works.

Claude Desktop

Open Claude Desktop, go to Settings → Developer → Edit Config. This opens claude_desktop_config.json:

Mac: ~/Library/Application Support/Claude/claude_desktop_config.json
Windows: %APPDATA%\Claude\claude_desktop_config.json

Paste this in (keep any other servers you already have inside "mcpServers"):

"mcpServers": { "onchain-data": { "command": "/Users/you/.cargo/bin/onchain-data-mcp", "args": ["--config-dir", "/Users/you/.onchain-data-mcp"], "env": { "ODMSERVERDATA_DIR": "/Users/you/.onchain-data-mcp/data", "ALCHEMY_API_KEY": "", "HELIUS_API_KEY": "" } } } }

command is where the program is. Find yours with which onchain-data-mcp (Mac/Linux) or where onchain-data-mcp (Windows). Homebrew puts it in /opt/homebrew/bin/onchain-data-mcp.
On Windows, use paths like "C:\\Users\\you\\.cargo\\bin\\onchain-data-mcp.exe" (double backslashes).
The keys are optional. Leave them empty, remove them, or add them later in the dashboard.

Quit Claude Desktop completely and open it again.

Claude Code

claude mcp add onchain-data -e ODM__SERVER__DATA_DIR=$HOME/.onchain-data-mcp/data -- onchain-data-mcp --config-dir $HOME/.onchain-data-mcp

Cursor

Click the Install in Cursor button at the top, or paste this into ~/.cursor/mcp.json (or .cursor/mcp.json inside one project), then turn it on in Cursor Settings → MCP:

VS Code

Click the Install in VS Code button at the top. To use your settings folder, open the MCP settings in VS Code and add "args": ["--config-dir", "/Users/you/.onchain-data-mcp"].

Other apps (over the web address)

If the program is already running (for example started by another app, or with onchain-data-mcp serve), any app that supports MCP over HTTP can connect to:

http://127.0.0.1:8787/mcp

The dashboard's Connect page shows ready-to-copy settings with your real paths filled in.

The dashboard

Your control panel at http://127.0.0.1:8787/dashboard. Only your own computer can open it.


	Login. Enter your dashboard password, or use the one-click link from `onchain-data-mcp password`.
	Setup guide. Three steps: add keys, pick tools, connect your AI app.
	Overview. Is everything healthy? Plus a live list of calls as they happen (counted since the last start).
	Providers. Each data service with its tier, your key, a Test button, usage, budget and a 30-day chart. Export usage as a spreadsheet (CSV).
	Routing. Which provider is asked first for each job. Drag to reorder, or use the up/down arrows.
	Tools & Chains. Turn tools and chains on or off.
	Clients. Only when you run it for others: create and cancel client keys, and set limits.
	Connect. Copy-paste settings for Claude Desktop, Claude Code, Cursor and other apps.

Password and keys

There are three kinds of keys. Only the first one is needed, and it is made for you.

Key	What it is	Who uses it
Dashboard password	The password for your control panel.	Only you.
Client keys (start with `odm_`)	Only when you run it for others. One per customer or app. Shown once when created.	Your customers' apps.

| Provider keys | Your own free accounts at Alchemy, Helius and others. The program u

Only the beginning is shown; read the rest in the repo

Onchain Data MCP

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 Otheri

Common questions

Alternatives

Spec Driven Development

Remote Desktop Commander

Agent Data Tools: Utilities

README from the maker

onchain-data-mcp

Contents

What you can do

Quick start

1. Install the program

the program is now at target/release/onchain-data-mcp

2. Connect your AI app

3. Open the dashboard

Connect to AI apps

Claude Desktop

Claude Code

Cursor

VS Code

Other apps (over the web address)

The dashboard

Password and keys