CryptoAPIs MCP Simulate
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MCP server for dry-run EVM transaction simulation via Crypto APIs
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- Author
- cryptoapis-io
- Categories
- Other, Finance
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Setup
Install CryptoAPIs MCP Simulate in your MCP client (Claude Desktop, Cursor, Windsurf, and others).
Repository: https://github.com/cryptoapis-io/cryptoapis-mcp-simulate
Follow the installation instructions in the repository README, then restart your MCP client.
MCP server for dry-run EVM transaction simulation via Crypto APIs
MCP server forCrypto APIsSimulate product. Dry-run EVM transactions to preview results without broadcasting.
API Version:Compatible with Crypto APIs version2024-12-12
- Simulate EVM transactions before broadcasting
- Preview transaction results, gas usage, and state changes
- Supports all EVM-compatible blockchains (Ethereum, Ethereum Classic, BSC, Polygon, Avalanche (C-Chain), Arbitrum, Base, Optimism, Tron)
- Node.js 18+
- Crypto APIsaccount and API key (sign up|get API key)
Or install all Crypto APIs MCP servers:npm install @cryptoapis-io/mcp
# 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 npx @cryptoapis-io/mcp-simulate --transport http --port 3000 --api-key YOUR_API_KEY
Add to your Claude Desktop config (~/Library/Application Support/Claude/claude_desktop_config.jsonon macOS,%APPDATA%\Claude\claude_desktop_config.jsonon Windows):
{ "mcpServers": { "cryptoapis-simulate": { "command": "npx", "args": ["-y", "@cryptoapis-io/mcp-simulate"], "env": { "CRYPTOAPIS_API_KEY": "your_api_key_here" } } } }
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" } } } }
npx @modelcontextprotocol/inspector npx @cryptoapis-io/mcp-simulate --api-key YOUR_API_KEY
- Start the server in HTTP mode:
npx @cryptoapis-io/mcp-simulate --transport http --port 3000 --api-key YOUR_API_KEY
All servers default to port 3000. Use--portto assign different ports when running multiple servers.
When using HTTP transport, the server supports two API key modes:
- With--api-key:The key is used for all requests.x-api-keyrequest headers are ignored.
- Without--api-key:Each request must include anx-api-keyheader 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
Stdio transport always requires an API key at startup.
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.
Crypto APIs provides an official remote MCP server with all tools available via HTTP Streamable transport athttps://ai.cryptoapis.io/mcp. Pass your API key via thex-api-keyheader — no installation required.
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