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The Tenderly MCP Server gives AI assistants direct access to Tenderly, creating Virtual Environments, simulating transactions, tracing execution, inspecting contracts, and more. Use natural language in Claude to drive your entire smart contract development workflow.
The MCP Server requires a Tenderly account and at least one project.

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Get started

Quickstart

Tools Reference

Examples

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What is MCP?

The Model Context Protocol (MCP) is an open standard by Anthropic that lets AI models connect to external tools and data sources. Instead of copy-pasting RPC responses or writing curl commands, Claude can call Tenderly tools directly, live blockchain data, transaction simulation, debugging, and Virtual Environment management all happen within the conversation.

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Capabilities

The MCP Server exposes 59 tools across seven areas:
  • Virtual Environments: Create, fork, delete, and manage private blockchain environments. Set a Virtual Environment as active and all subsequent tools operate on it automatically. Fund accounts, set ERC-20 balances, write to storage slots, send impersonated transactions, make read-only contract calls, mine blocks, time-travel, and save/restore snapshots for branching test scenarios.
  • Transaction Simulation: Simulate any transaction on any supported EVM network without spending gas. Get decoded call traces, events, state changes, asset transfers, and balance diffs.
  • Transaction Tracing: Trace on-chain and Virtual Environment transactions with full execution details. Inspect call trees, gas breakdown, state diffs, and EIP-2930 access lists.
  • Advanced Trace Navigation: 16 tools for navigating complex transactions with hundreds or thousands of internal calls. Includes trace size inspection, skeleton views, subtree drilling, failure detection, error path tracing, and fund flow analysis.
  • Contract Inspection: Retrieve contract metadata for any address: name, ABI, compiler version, token standards, and creation info.
  • Network Discovery: List all 100+ EVM networks Tenderly supports.
  • Project Management: List projects and set the active project context.
See the full Tools Reference for details on every tool.

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Supported clients

The Tenderly MCP Server works with any MCP-compatible client:
  • Claude Code: Add via CLI with one command
  • Claude.ai: Connect through Settings → Connectors
  • Claude Desktop: Connect through Settings → Connectors
  • Cursor/VS Code: Add the server URL to your MCP config
See the Quickstart for setup instructions for each client.

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Authentication

The MCP Server uses OAuth 2.0 via WorkOS. When you connect from Claude, you’ll be redirected to Tenderly to log in and authorize access. Claude can only perform actions within the scope of your permissions. Revoke access at any time by disconnecting the connector in Claude.