MCP Simulate

Name: MCP Simulate
Author: CryptoAPIs-io

by CryptoAPIs-ioversion 0.4.0i★ 0iRuns on your computer

Registry nameio.github.CryptoAPIs-io/mcp-simulate

How to install

Overview

Description from the maker (original English)

MCP server for dry-run Ethereum transaction simulation via Crypto APIs

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: CRYPTOAPIS_API_KEY

Install

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

Passed 3/3 checks · Runs on your computer

First: which AI do you use?

ClaudeWeb · app · phoneChatGPTWebClaude CodeTerminalCursorCode editorVS CodeCode editorOtherOther apps

Pick your app and the steps appear below.

Works with Claude, with some setup first

You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a MCP Simulate key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open the Claude desktop app’s settings file
SettingsDeveloperEdit Config
Done

Paste these settings and save the file

{
  "mcpServers": {
    "simulate": {
      "command": "npx",
      "args": [
        "-y",
        "@cryptoapis-io/mcp-simulate"
      ],
      "env": {
        "CRYPTOAPIS_API_KEY": "your-value"
      }
    }
  }
}

Paste the key only into the app’s field, never into a chat or to anyone

Done

Quit Claude and open it again
Done
Try it
Use MCP Simulate and tell me what you can do for me, then show me one thing
✓ If Claude says it is using MCP Simulate or shows a MCP Simulate tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

ChatGPT cannot connect MCP Simulate yet

MCP Simulate runs on your computer, but ChatGPT can only connect servers that run on the web

What you can do instead

A · Use an app that can connect MCP Simulate

Steps for Claude →You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time) · Only the Claude desktop app (Windows or Mac), not the web or phone
Steps for Claude Code →You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for Cursor →You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)
Steps for VS Code →You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

B · Others in Crypto & blockchain that work with ChatGPT

Picked from the most used in the same category, only ones that connect by address with no key

Solana MCP by Vybe✓ ChatGPT
0xinsider✓ ChatGPT
Highwire✓ ChatGPT

Works with Claude Code, with some setup first

You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a MCP Simulate key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Open Terminal
Mac: press Command+Space and type Terminal · Windows: open PowerShell
Done
4
Paste this command and press Enter
```
claude mcp add simulate --env CRYPTOAPIS_API_KEY=your-value -- npx -y @cryptoapis-io/mcp-simulate
```
Replace “your-value” with your key before pressing Enter
Paste the key only into the app’s field, never into a chat or to anyone
Done
Type /mcp in Claude Code
You should see MCP Simulate listed as connected
Done
Try it
Use MCP Simulate and tell me what you can do for me, then show me one thing
✓ If Claude Code says it is using MCP Simulate or shows a MCP Simulate tool in the answer, you are connected

Menu names checked against Anthropic’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with Cursor, with some setup first

You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a MCP Simulate key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open Cursor
Open in Cursor
Cursor asks you to confirm; click Install
Done
Fill in your key
In the MCP Simulate settings, CRYPTOAPIS_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in Cursor in Agent mode
Done
Try it
Use MCP Simulate and tell me what you can do for me, then show me one thing
✓ If Cursor says it is using MCP Simulate or shows a MCP Simulate tool in the answer, you are connected

Menu names checked against Cursor’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Works with VS Code, with some setup first

You need a MCP Simulate key (sign up on the maker’s site, may cost money) · Install Node.js on your computer first (one time)

Install Node.js
One time only; it works for every server that needs Node.js
Open the Node.js download page ↗
Done
Sign up and create a MCP Simulate key
Open the maker’s site, sign up and create an API key for the next step. It may cost money.
How to get a key is in the maker’s README below
Done
Click this button to open VS Code
Open in VS Code
VS Code asks you to confirm; click Install
Done
Fill in your key
In the MCP Simulate settings, CRYPTOAPIS_API_KEY is empty; add your key and save
Paste the key only into the app’s field, never into a chat or to anyone
Done
Open the AI chat in VS Code in Agent mode
Done
Try it
Use MCP Simulate and tell me what you can do for me, then show me one thing
✓ If VS Code says it is using MCP Simulate or shows a MCP Simulate tool in the answer, you are connected

Menu names checked against VS Code’s help page on Nov 11, 2026 · your screen may differ slightly by app version

Other apps that use MCP, such as Windsurf, Zed or Gemini CLI, each add servers differently. See how in the app list.

See every app that uses MCP →

JSON settings are under “For developers” below

Stuck? Ask people who use MCP Simulate💬 Discussion →

For developers: Terminal commands and JSON settings

Installed on your computer

Claude Code

claude mcp add simulate --env CRYPTOAPIS_API_KEY=your-value -- npx -y @cryptoapis-io/mcp-simulate

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "simulate": {
      "command": "npx",
      "args": [
        "-y",
        "@cryptoapis-io/mcp-simulate"
      ],
      "env": {
        "CRYPTOAPIS_API_KEY": "your-value"
      }
    }
  }
}

Cursor (~/.cursor/mcp.json)

{
  "mcpServers": {
    "simulate": {
      "command": "npx",
      "args": [
        "-y",
        "@cryptoapis-io/mcp-simulate"
      ],
      "env": {
        "CRYPTOAPIS_API_KEY": "your-value"
      }
    }
  }
}

VS Code (mcp.json)

{
  "servers": {
    "simulate": {
      "type": "stdio",
      "command": "npx",
      "args": [
        "-y",
        "@cryptoapis-io/mcp-simulate"
      ],
      "env": {
        "CRYPTOAPIS_API_KEY": "your-value"
      }
    }
  }
}

Values you fill in

CRYPTOAPIS_API_KEY secret required env
Crypto APIs API key

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

At a glance

GitHub stars i: 0
Downloads per weeki: 64/wk
Licence i: MIT
Connection: Runs on your computer
Transport: stdio
Latest versioni: 0.4.0
Categoryi: Crypto & blockchain
Published to registryi: Sep 24, 2026
Code last changedi: Sep 28, 2026
Maker: CryptoAPIs-io
Packages: npm: @cryptoapis-io/mcp-simulate
Repo: CryptoAPIs-io/cryptoapis-mcp-simulate
Registry status: Active

Which apps can use it

Based on how this server connects and on each app’s own docs, checked Nov 10, 2026.

Run on your computer in

Claude Goose LM Studio Msty Studio Cherry Studio Cursor VS Code + GitHub Copilot Visual Studio Windsurf (Devin Desktop)Zed Kiro Cline Continue JetBrains AI Assistant Claude Code Codex CLI Gemini CLI OpenCode nodecode Warp LibreChat Raycast

All apps, with pros and cons →

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 11, 2026

✓ Pass
Maker matches the repo
The registry name was verified with the GitHub account CryptoAPIs-io, which owns the repo
✓ Pass
Still maintained
Code last changed 44 days ago
✓ Pass
Has a licence
Uses MIT
– 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

Discussion

Ask, share a tip or report that it does not work. Sorted by what people marked helpful.

No posts yet. Be the first to ask or share.

Posts here are written by users, not the PopNx team.

User reviews

No reviews yet

Compared with others in Crypto & blockchaini

More stars than 0% of the other 1646 servers in this category
Published to the registry more recently than 50% of the other 1646 servers in this category
Basic checks equal to or better than 100% of the other 1646 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 MCP Simulate 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?

You need to fill in: CRYPTOAPIS_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 44 days ago, and the latest version (0.4.0) reached the registry 2 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: Solana MCP by Vybe, Oracle3 prediction-market arbitrage checks, Polymarket Paper Trader

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

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by vybenetworkWidely used★ 2.6K Stars for the whole repoUpdated 6 months ago

Runs in the cloud

Install

Oracle3 prediction-market arbitrage checks

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by YichengYang-EthanGrowing↓ 35/wk★ 568Updated 42 days ago

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Polymarket Paper Trader

Polymarket paper trading for AI agents: $10k paper money, real order books, official fees.

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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.

@cryptoapis-io/mcp-simulate

MCP server for Crypto APIs Simulate product. Dry-run Ethereum transactions to preview results without broadcasting.

API Version: Compatible with Crypto APIs version 2024-12-12

Features

Simulate Ethereum transactions before broadcasting
Preview transaction results, gas usage, and state changes
Ethereum only (mainnet, sepolia) — the underlying API endpoint has no blockchain parameter

Prerequisites

Node.js 18+
Crypto APIs account and API key (sign up | get API key)

Installation

npm install @cryptoapis-io/mcp-simulate

Or install all Crypto APIs MCP servers: npm install @cryptoapis-io/mcp

Usage

# Run with API key

npx @cryptoapis-io/mcp-simulate --api-key YOUR_API_KEY

Or use environment variable

export CRYPTOAPIS_API_KEY=YOUR_API_KEY npx @cryptoapis-io/mcp-simulate

HTTP transport (listens on 127.0.0.1; see "Exposing the server beyond localhost")

npx @cryptoapis-io/mcp-simulate --transport http --port 3000 --api-key YOUR_API_KEY

Claude Desktop

Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.json on macOS, %APPDATA%\Claude\claude_desktop_config.json on Windows):

"mcpServers": { "cryptoapis-simulate": { "command": "npx", "args": ["-y", "@cryptoapis-io/mcp-simulate"], "env": { "CRYPTOAPIS_API_KEY": "your_api_key_here" } } } }

Cursor

Add to .cursor/mcp.json (project) or ~/.cursor/mcp.json (global):

"mcpServers": { "cryptoapis-simulate": { "command": "npx", "args": ["-y", "@cryptoapis-io/mcp-simulate"], "env": { "CRYPTOAPIS_API_KEY": "your_api_key_here" } } } }

MCP Inspector

npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-simulate --api-key YOUR_API_KEY

n8n

Start the server in HTTP mode:

   npx @cryptoapis-io/mcp-simulate --transport http --port 3000 --api-key YOUR_API_KEY

In your n8n workflow, add an AI Agent node
Under Tools, add an MCP Client Tool and set the URL to http://localhost:3000/mcp

n8n in Docker: localhost inside the container is not your machine. Start the server with --host 0.0.0.0 and MCP_AUTH_TOKEN set (see Exposing the server beyond localhost), use http://host.docker.internal:3000/mcp as the URL, and add an Authorization: Bearer header to the MCP Client Tool credential.

All servers default to port 3000. Use --port to assign different ports when running multiple servers.

Available Tools

`simulate_evm`

Simulate an Ethereum transaction (dry run). Ethereum only — the underlying endpoint has no blockchain parameter.

Parameter	Description
`network`	Network: `mainnet` or `sepolia`
`fromAddress`	Sender address
`toAddress`	Recipient address
`value`	Amount to send (in native coin)
`data`	Contract call data (hex)
`gasLimit`	Gas limit
`gasPrice`	Gas price

CLI Arguments

Argument	Description	Default
`--api-key`	Crypto APIs API key	`CRYPTOAPIS_API_KEY` env var
`--transport`	Transport type: `stdio` or `http`	`stdio`
`--host`	HTTP host (use `0.0.0.0` to accept remote connections — requires an auth token with `--api-key`)	`127.0.0.1`
`--auth-token`	Bearer token callers must send (`Authorization: Bearer` ); prefer the `MCP_AUTH_TOKEN` env var	`MCP_AUTH_TOKEN` env var
`--allowed-hosts`	Comma-separated `Host` header allowlist for non-loopback binds	—
`--port`	HTTP port	`3000`
`--path`	HTTP path	`/mcp`
`--stateless`	Enable stateless HTTP mode	`false`

HTTP API Key Modes

When using HTTP transport, the server supports two API key modes:

With `--api-key`: The key is used for all requests. x-api-key request headers are ignored.
Without `--api-key`: Each request must include an x-api-key header with a valid Crypto APIs key. This enables hosting a public server where each user provides their own key.

# Per-request key mode (multi-tenant)

npx @cryptoapis-io/mcp-simulate --transport http --port 3000

Clients send x-api-key header with each request

Exposing the server beyond localhost

HTTP mode listens on 127.0.0.1 by default, so only processes on the same machine can reach it. To accept connections from other machines or containers, bind explicitly and protect the port:

# Startup-key mode: callers must present the token (the server refuses to start without one)

export MCP_AUTH_TOKEN=$(openssl rand -hex 32) npx @cryptoapis-io/mcp-simulate --transport http --host 0.0.0.0 --port 3000 --api-key YOUR_API_KEY \ --allowed-hosts mcp.internal.example

Clients send: Authorization: Bearer $MCP_AUTH_TOKEN

Per-request key mode: no startup key, every request must carry the caller's own x-api-key

npx @cryptoapis-io/mcp-simulate --transport http --host 0.0.0.0 --port 3000

--allowed-hosts restricts the Host header (DNS rebinding protection) when not bound to loopback. Prefer MCP_AUTH_TOKEN over --auth-token: command-line arguments are visible in the process list.

Stdio transport always requires an API key at startup.

Important: API Key Required

Warning: Making requests without a valid API key — or with an incorrect one — may result in your IP being banned from the Crypto APIs ecosystem. Always ensure a valid API key is configured before starting any server.

Remote MCP Server

Crypto APIs provides an official remote MCP server with all tools available via HTTP Streamable transport at https://ai.cryptoapis.io/mcp. Pass your API key via the x-api-key header — no installation required.

License

MIT

MCP Simulate

Overview

What you can do with it

Install

Install Node.js

Sign up and create a MCP Simulate key

Open the Claude desktop app’s settings file

Paste these settings and save the file

Quit Claude and open it again

Try it

What you can do instead

Install Node.js

Sign up and create a MCP Simulate key

Open Terminal

Paste this command and press Enter

Type /mcp in Claude Code

Try it

Install Node.js

Sign up and create a MCP Simulate key

Click this button to open Cursor

Fill in your key

Open the AI chat in Cursor in Agent mode

Try it

Install Node.js

Sign up and create a MCP Simulate key

Click this button to open VS Code

Fill in your key

Open the AI chat in VS Code in Agent mode

Try it

Installed on your computer

Values you fill in

At a glance

Which apps can use it

Related guides

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

Discussion

User reviews

Compared with others in Crypto & blockchaini

Common questions

Alternatives

Solana MCP by Vybe

Oracle3 prediction-market arbitrage checks

Polymarket Paper Trader

README from the maker

@cryptoapis-io/mcp-simulate

Features

Prerequisites

Installation

Usage

Or use environment variable

HTTP transport (listens on 127.0.0.1; see "Exposing the server beyond localhost")

Claude Desktop

Cursor

MCP Inspector

n8n

Available Tools

simulate_evm

CLI Arguments

HTTP API Key Modes

Clients send x-api-key header with each request

Exposing the server beyond localhost

Clients send: Authorization: Bearer $MCP_AUTH_TOKEN

Per-request key mode: no startup key, every request must carry the caller's own x-api-key

Important: API Key Required

Remote MCP Server

License

`simulate_evm`