Foundry MCP Server
Foundry MCP server enabling AI agents to interact with the Foundry Ethereum development toolkit — running Forge tests, deploying smart contracts via Cast, checking contract ABIs, compiling Solidity code, and integrating Foundry's EVM development toolchain into agent-driven smart contract development and testing workflows.
Score Breakdown
⚙ Agent Friendliness
🔒 Security
CRITICAL private key risk. Never expose private keys. Community MCP. Test on testnets. Mainnet has real financial risk.
⚡ Reliability
Best When
A Solidity developer using Foundry needs AI assistance with smart contract development — compiling, testing, and deploying contracts through a unified MCP interface.
Avoid When
You use Hardhat, Truffle, or non-EVM blockchains — Foundry is Ethereum/EVM specific.
Use Cases
- • Running Solidity smart contract tests via Forge from development agents
- • Deploying contracts to testnet/mainnet via Cast from deployment agents
- • Checking contract compilation and ABI generation from build agents
- • Debugging smart contract failures from testing agents
- • Verifying contract source code on Etherscan from deployment agents
- • Automating Foundry-based Solidity development workflows from coding agents
Not For
- • Non-Solidity smart contract development (Foundry is Solidity/EVM-focused)
- • Hardhat-based workflows (separate MCP would be needed)
- • Teams without Foundry installed (distinct from Hardhat/Truffle)
Interface
Authentication
Foundry must be installed. Deployment requires private key or hardware wallet for mainnet. RPC endpoint URL needed. Never expose private keys.
Pricing
Foundry is free open source. MCP server is free. Gas fees apply for mainnet deployments. RPC providers (Alchemy, Infura) have free tiers.
Agent Metadata
Known Gotchas
- ⚠ CRITICAL: Never expose private keys — use hardware wallets or environment variables only
- ⚠ Mainnet deployments spend real ETH gas — test on testnets first
- ⚠ Foundry must be installed via foundryup — separate installation step
- ⚠ Forge test output can be verbose — agents must parse and summarize results
- ⚠ RPC endpoint required for fork tests and deployment — configure separately
- ⚠ Community MCP from PraneshASP — not official Foundry tooling
Alternatives
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Scores are editorial opinions as of 2026-03-07.