Supported Networks¶

abi-to-mcp supports many EVM-compatible networks out of the box.

Mainnets¶

Network	Chain ID	CLI Flag	Explorer API
Ethereum	1	`mainnet`	api.etherscan.io
Polygon	137	`polygon`	api.polygonscan.com
Arbitrum One	42161	`arbitrum`	api.arbiscan.io
Optimism	10	`optimism`	api-optimistic.etherscan.io
Base	8453	`base`	api.basescan.org
BNB Smart Chain	56	`bsc`	api.bscscan.com
Avalanche C-Chain	43114	`avalanche`	api.snowtrace.io
Fantom	250	`fantom`	api.ftmscan.com
Gnosis	100	`gnosis`	api.gnosisscan.io

Testnets¶

Network	Chain ID	CLI Flag	Explorer API
Sepolia	11155111	`sepolia`	api-sepolia.etherscan.io
Goerli (deprecated)	5	`goerli`	api-goerli.etherscan.io
Mumbai	80001	`mumbai`	api-testnet.polygonscan.com
Arbitrum Sepolia	421614	`arbitrum-sepolia`	api-sepolia.arbiscan.io
Optimism Sepolia	11155420	`optimism-sepolia`	api-sepolia-optimistic.etherscan.io
Base Sepolia	84532	`base-sepolia`	api-sepolia.basescan.org

Layer 2 Networks¶

Network	Chain ID	CLI Flag	Type
Arbitrum One	42161	`arbitrum`	Optimistic Rollup
Optimism	10	`optimism`	Optimistic Rollup
Base	8453	`base`	Optimistic Rollup
zkSync Era	324	`zksync`	ZK Rollup
Polygon zkEVM	1101	`polygon-zkevm`	ZK Rollup
Linea	59144	`linea`	ZK Rollup

Network Configuration¶

Environment Variables¶

Each network can use specific API key environment variables:

Network	API Key Variable
Ethereum	`ETHERSCAN_API_KEY`
Polygon	`POLYGONSCAN_API_KEY`
Arbitrum	`ARBISCAN_API_KEY`
Optimism	`OPTIMISM_API_KEY`
Base	`BASESCAN_API_KEY`
BSC	`BSCSCAN_API_KEY`

Default RPC Endpoints¶

Rate Limits

Default public endpoints have rate limits. For production, use dedicated providers like Alchemy, Infura, or QuickNode.

Network	Default RPC
Ethereum	`https://eth.llamarpc.com`
Polygon	`https://polygon.llamarpc.com`
Arbitrum	`https://arb1.arbitrum.io/rpc`
Optimism	`https://mainnet.optimism.io`
Base	`https://mainnet.base.org`

Usage Examples¶

Generate for Different Networks¶

# Ethereum mainnet (default)
abi-to-mcp generate 0x... -n mainnet

# Polygon
abi-to-mcp generate 0x... -n polygon

# Arbitrum
abi-to-mcp generate 0x... -n arbitrum

# Base
abi-to-mcp generate 0x... -n base

Custom RPC URL¶

Override the default RPC in your .env:

# Use Alchemy
RPC_URL=https://eth-mainnet.g.alchemy.com/v2/YOUR-KEY

# Use Infura
RPC_URL=https://mainnet.infura.io/v3/YOUR-KEY

# Use QuickNode
RPC_URL=https://your-endpoint.quiknode.pro/YOUR-KEY/

Network Details¶

Ethereum Mainnet¶

name: Ethereum Mainnet
chain_id: 1
currency:
  name: Ether
  symbol: ETH
  decimals: 18
block_time: ~12 seconds
explorer: https://etherscan.io

Polygon¶

name: Polygon
chain_id: 137
currency:
  name: MATIC
  symbol: MATIC
  decimals: 18
block_time: ~2 seconds
explorer: https://polygonscan.com

Arbitrum One¶

name: Arbitrum One
chain_id: 42161
currency:
  name: Ether
  symbol: ETH
  decimals: 18
block_time: ~0.25 seconds
explorer: https://arbiscan.io

Optimism¶

name: Optimism
chain_id: 10
currency:
  name: Ether
  symbol: ETH
  decimals: 18
block_time: ~2 seconds
explorer: https://optimistic.etherscan.io

Base¶

name: Base
chain_id: 8453
currency:
  name: Ether
  symbol: ETH
  decimals: 18
block_time: ~2 seconds
explorer: https://basescan.org

Adding Custom Networks¶

See the Custom Network Guide for adding networks not listed here.

Configuration File¶

Create ~/.abi-to-mcp/networks.json:

{
  "networks": {
    "my-network": {
      "name": "My Network",
      "chain_id": 12345,
      "rpc_url": "https://rpc.my-network.com",
      "explorer_url": "https://api.my-explorer.com/api",
      "explorer_api_key_env": "MY_NETWORK_API_KEY",
      "currency": {
        "name": "MyCoin",
        "symbol": "MYC",
        "decimals": 18
      }
    }
  }
}

Then use:

abi-to-mcp generate 0x... -n my-network