Networks

The networks described here are supported by CDP REST and JSON-RPC APIs described in the left-hand nav.

REST API

A comprehensive list of CDP APIs offered across the networks we support, along with their corresponding testnets.

Base

API	Base Mainnet	Base Sepolia
Addresses	✅	✅
Assets	✅	✅
Faucet	-	✅
Networks	✅	✅
Paymaster	✅	✅
Send	✅	✅
Smart Contract Interactions	✅	✅
Smart Contract Events	✅	-
Staking	-	-
Trades	✅	-
Wallet API	✅	✅
Webhooks	✅	✅

When constructing a REST API request for Base, use base-mainnet or base-sepolia as the network identifier.

Ethereum

API	Ethereum Mainnet	Ethereum Sepolia	Ethereum Holesky	Ethereum Hoodi
Addresses	✅	✅	-	✅
Assets	✅	✅	✅	-
Faucet	-	✅	✅	-
Networks	✅	✅	✅	-
Paymaster	-	-	-	-
Send	✅	✅	✅	-
Smart Contract Interactions	✅	-	-	-
Smart Contract Events	✅	-	-	-
Staking	✅	-	✅	✅
Trades	✅	-	-	-
Wallet API	✅	✅	-	-
Webhooks	-	-	-	-

When constructing a REST API request for Ethereum, use ethereum-mainnet, ethereum-sepolia, ethereum-holesky or ethereum-hoodi as the network identifier.

Solana

API	Solana Mainnet	Solana Devnet
Addresses	-	-
Assets	-	-
Faucet	-	-
Networks	-	-
Paymaster	-	-
Send	-	-
Smart Contract Interactions	-	-
Smart Contract Events	-	-
Staking	✅	✅
Trades	-	-
Wallet API	-	-
Webhooks	-	-

When constructing a REST API request for Solana, use solana-mainnet or solana-devnet as the network identifier.

Others

We also support Arbitrum and Polygon.

API	Arbitrum Mainnet	Polygon Mainnet
Addresses	✅	✅
Assets	✅	✅
Faucet	-	-
Networks	✅	✅
Paymaster	-	-
Send	✅	✅
Smart Contract Interactions	✅	✅
Smart Contract Events	-	-
Staking	-	-
Trades	✅	✅
Wallet API	✅	✅
Webhooks	-	-

When constructing a REST API request for Arbitrum or Polygon, use arbitrum-mainnet or polygon-mainnet as the network identifier.

JSON-RPC API

CDP Node provides free, rate-limited RPC endpoints built for Base and the Base Sepolia testnet.

Free users are limited to approximately 50 requests per second. Please reach out in #node on our CDP Discord to request a limit increase.

Base

RPC namespace	Functionality	Base Mainnet	Base Sepolia
cdp_*	Historical address data	✅	✅
pm_*	Gas sponsorship management (Paymaster)	✅	✅
eth_*	Base-specific EVM functionality	✅	✅
web3_*	Client information	✅	✅
debug_*	Debug tools	✅	✅
net_*	Network info	✅	✅

Need an RPC endpoint? Create a new CDP account or sign in to your existing account, then navigate to the Node page to get your free RPC endpoint and start building onchain!

When constructing a JSON-RPC API request, use base or base-sepolia as the network identifier.

Network identifiers

The following table shows the network identifiers necessary for constructing requests to various CDP APIs:

Network	EVM Chain ID	HTTP API Identifier	JSON-RPC API Identifier
Arbitrum Mainnet	42161 (0xa4b1)	arbitrum-mainnet	arbitrum
Base Mainnet	8453 (0x2105)	base-mainnet	base
Base Sepolia	84532 (0x14a34)	base-sepolia	base-sepolia
Bitcoin Mainnet	-	bitcoin-mainnet	bitcoin
Ethereum Holesky	17000 (0x4268)	ethereum-holesky	-
Ethereum Hoodi	560048 (0x88bb0)	ethereum-hoodi	-
Ethereum Mainnet	1 (0x1)	ethereum-mainnet	ethereum
Optimism Mainnet	10 (0xa)	optimism-mainnet	optimism
Polygon Mainnet	137 (0x89)	polygon-mainnet	polygon
Solana Devnet	-	solana-devnet	-
Solana Mainnet	-	solana-mainnet	-

For CDP SDKs, find network identifiers in the corresponding SDK documentation (e.g, NodeJS and Python).