List All Chains
GET/chains
Retrieve every supported chain with its token addresses, Uniswap venues and CCTP configuration.
The
contracts block is a legacy field from the router era. Nothing in the calldata path uses
it — bundles call lending protocols, Uniswap and Circle’s TokenMessengerV2 directly. The keys
you want here are tokens, cctp and uniswap.Request
curl "https://api.1tx.fi/api/v1/chains"
Response
{
"chains": [
{
"chainId": 8453,
"name": "base",
"displayName": "Base Mainnet",
"blockExplorer": "https://basescan.org",
"isTestnet": false,
"contracts": {
"instrumentRegistry": "0x94CC7106f7741FA2d374Ca7b808645fF43b6d2a3",
"swapPoolRegistry": "0xe6C6e82970b5f320B8E3a97fA1aDa5e06fb168b4",
"quoter": "0x0d5e0f971ed27fbff6c2837bf31316121532048d",
"adapters": {
"aave": "0xBACC8882E2a9f5a67570E1BC10d87062dB68dfDd",
"compound": "0x24fe3D7a9aAdD40033F0C19Ad10D1dF2ea6F7c1B",
"morpho": "0x12A41B400ca8f81FD09DCcf83Be4632e681Ed2B5",
"euler": "0x873C9fFCc888622EF322746F653Bce12450E0Fd8",
"fluid": "0x5fD5b1EF0a8FE892e5bdBFbd35CeEc7B3B950372"
}
},
"uniswap": {
"poolManager": "0x498581ff718922c3f8e6a244956af099b2652b2b",
"positionManager": "0x7c5f5a4bbd8fd63184577525326123b519429bdc",
"swapRouter": "0x6fF5693b99212Da76ad316178A184AB56D299b43",
"permit2": "0x000000000022D473030F116dDEE9F6B43aC78BA3"
},
"cctp": {
"supported": true,
"domain": 6,
"tokenMessenger": "0x28b5a0e9C621a5BadaA536219b3a228C8168cf5d",
"messageTransmitter": "0x81D40F21F12A8F0E3252Bccb954D722d4c464B64"
},
"tokens": {
"USDC": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"EURC": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
"USDbC": "0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA",
"GHO": "0x6Bb7a212910682DCFdbd5BCBb3e28FB4E8da10Ee",
"USDS": "0xA88594D404727625A9437C3f886C7643872296AE",
"DAI": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
"eUSD": "0xCfA3Ef56d303AE4fAabA0592388F19d7C3399FB4",
"WETH": "0x4200000000000000000000000000000000000006"
}
}
],
"total": 4
}
Response Fields
| Field | Type | Description |
|---|---|---|
chainId | number | The blockchain’s chain ID |
name | string | Internal chain name (lowercase) |
displayName | string | Human-readable chain name |
blockExplorer | string | URL to the block explorer |
isTestnet | boolean | Whether this is a testnet |
contracts | object | Legacy router-era deployment addresses. Not used by the calldata path |
uniswap | object | Uniswap venue addresses. swapRouter is the Universal Router |
cctp | object | CCTP configuration: supported, domain, tokenMessenger, messageTransmitter |
cctp.domain | number | Circle domain id — what the bridge and Iris use, not the chain id |
tokens | object | Common token addresses on this chain |
Get Single Chain
GET/chains/:chainId
Retrieve detailed information about a specific blockchain.
Request
curl "https://api.1tx.fi/api/v1/chains/8453"
Path Parameters
| Parameter | Type | Required | Description |
|---|---|---|---|
chainId | number | Yes | The chain ID (e.g., 8453 for Base) |
Response
{
"chainId": 8453,
"name": "base",
"displayName": "Base Mainnet",
"blockExplorer": "https://basescan.org",
"isTestnet": false,
"contracts": {
"instrumentRegistry": "0x94CC7106f7741FA2d374Ca7b808645fF43b6d2a3",
"swapPoolRegistry": "0xe6C6e82970b5f320B8E3a97fA1aDa5e06fb168b4",
"quoter": "0x0d5e0f971ed27fbff6c2837bf31316121532048d",
"adapters": {
"aave": "0xBACC8882E2a9f5a67570E1BC10d87062dB68dfDd",
"compound": "0x24fe3D7a9aAdD40033F0C19Ad10D1dF2ea6F7c1B",
"morpho": "0x12A41B400ca8f81FD09DCcf83Be4632e681Ed2B5",
"euler": "0x873C9fFCc888622EF322746F653Bce12450E0Fd8",
"fluid": "0x5fD5b1EF0a8FE892e5bdBFbd35CeEc7B3B950372"
}
},
"uniswap": {
"poolManager": "0x498581ff718922c3f8e6a244956af099b2652b2b",
"positionManager": "0x7c5f5a4bbd8fd63184577525326123b519429bdc",
"swapRouter": "0x6fF5693b99212Da76ad316178A184AB56D299b43",
"permit2": "0x000000000022D473030F116dDEE9F6B43aC78BA3"
},
"cctp": {
"supported": true,
"domain": 6,
"tokenMessenger": "0x28b5a0e9C621a5BadaA536219b3a228C8168cf5d",
"messageTransmitter": "0x81D40F21F12A8F0E3252Bccb954D722d4c464B64"
},
"tokens": {
"USDC": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
"EURC": "0x60a3E35Cc302bFA44Cb288Bc5a4F316Fdb1adb42",
"USDbC": "0xd9aAEc86B65D86f6A7B5B1b0c42FFA531710b6CA",
"GHO": "0x6Bb7a212910682DCFdbd5BCBb3e28FB4E8da10Ee",
"USDS": "0xA88594D404727625A9437C3f886C7643872296AE",
"DAI": "0x50c5725949A6F0c72E6C4a641F24049A917DB0Cb",
"eUSD": "0xCfA3Ef56d303AE4fAabA0592388F19d7C3399FB4",
"WETH": "0x4200000000000000000000000000000000000006"
}
}
Error Responses
404 Not Found - Chain not supported{
"statusCode": 404,
"message": "Chain 1 not found or not supported"
}
TypeScript Example
const BASE_URL = 'https://api.1tx.fi/api/v1';
// Get all supported chains
async function getChains() {
const response = await fetch(`${BASE_URL}/chains`);
return response.json();
}
// Get specific chain details
async function getChain(chainId: number) {
const response = await fetch(`${BASE_URL}/chains/${chainId}`);
if (!response.ok) {
throw new Error(`Chain ${chainId} not supported`);
}
return response.json();
}
// Usage
const { chains } = await getChains();
console.log(`Supported chains: ${chains.map(c => c.displayName).join(', ')}`);
// Get Base chain contracts
const baseChain = await getChain(8453);
console.log('USDC:', baseChain.tokens.USDC, 'CCTP domain:', baseChain.cctp.domain);
console.log('Aave Adapter:', baseChain.contracts.adapters.aave);
Next Steps
Instruments API
Query DeFi instruments
Positions API
Query user positions