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Classic Swap
API version: 6.1
Introduction
Quick start
Methods
Find the best quote to swap with 1inch Router GET
Generate calldata to swap on 1inch Router GET
Address of the 1inch Router that is trusted to spend funds for the swap GET
Generate approve calldata to allow 1inch Router to perform a swap GET
Get the number of tokens that the 1inch Router is allowed to swap GET
List of liquidity sources that are available for routing in the 1inch Aggregation Protocol GET
List of tokens that are available for swap in the 1inch Aggregation protocol GET
Migration
Migration from v5.0 to v5.2
Migration from v5.2 to v6.0
Migration from v6.0 to v6.1
Docs·APIs·Swap API·Classic Swap·Methods·6.1·Generate calldata to swap on 1inch Router

Generate calldata to swap on 1inch Router

GEThttps://api.1inch.com/swap/v6.1/{chain}/swap
Supported on:
ArbitrumAvalancheBaseBNB ChainZKsyncEthereumGnosisOptimismPolygonLineaSonicUnichain

Parameters

chain
* number path
src
* string query
dst
* string query
amount
* string query
from
* string query
The address that calls the 1inch contract
origin
* string query
An EOA address that initiate the transaction
protocols
string query
All supported liquidity sources by default
fee
number query
Partner fee in percent. min: 0; max: 3 Should be the same for /quote and /swap
gasPrice
string query
Network price per gas in wei. By default fast network gas price
complexityLevel
number query
parts
number query
mainRouteParts
number query
gasLimit
number query
includeTokensInfo
boolean query
Return fromToken and toToken info in response
includeProtocols
boolean query
Return used swap protocols in response
includeGas
boolean query
Return approximated gas in response
connectorTokens
string query
excludedProtocols
string query
excluded supported liquidity sources
slippage
number query
Slippage tolerance in percent. Min: 0; Max: 50. Use either slippage or minReturn, not both. Advantages of slippage: - minReturn is calculated relative to the actual rate - For tokens with fee-on-transfer, re-estimation occurs and slippage is applied to the actual amount - Allows path re-routing if initial estimation fails Disadvantages of slippage: - The /swap result needs verification - check how much slippage the user agrees to accept Example: slippage=1 means accepting up to 1% less than the expected amount.
minReturn
string query
Minimum amount of destination token that must be received, in the smallest unit (considering decimals). Use either minReturn or slippage, not both. Advantages of minReturn: - Result guaranteed to not be lower than this amount Disadvantages of minReturn: - If rate changes between /quote and /swap requests, you'll get an error - Must be calculated manually relative to quote.dstAmount minus desired slippage percentage - Must be manually selected for fee-on-transfer tokens - Path won't be re-estimated if estimation fails - Requires precise calculation and understanding of the value being set Example: For a token with 18 decimals, minReturn=1000000000000000000 requires at least 1 token.
permit
string query
https://eips.ethereum.org/EIPS/eip-2612
receiver
string query
This address will receive funds after the swap. By default same address as "from" param
referrer
string query
allowPartialFill
boolean query
By default set to false
compatibility
boolean query
Allows to swap tokens with internal transfer fee
disableEstimate
boolean query
Enable this flag to disable onchain simulation
usePatching
boolean query
Enable this flag if you patch input amount on your smart contract
usePermit2
boolean query
Enable this flag in case you did an approval to permit2 smart contract
forceApprove
boolean query
When enabled, the approval check during simulation will be skipped

Request Body

This request doesn’t have any request body.

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const axios = require('axios');

async function httpCall() {
  const url = 'https://api.1inch.com/swap/v6.1/{chain}/swap';

  const config = {
    headers: {
      Authorization: `Bearer ${API_KEY}`,
    },
    params: {
      src: '0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee',
      dst: '0x111111111117dc0aa78b770fa6a738034120c302',
      amount: '10000000000000000',
      slippage: 1,
      minReturn: '1000000000000000000',
    },
    paramsSerializer: {
      indexes: null,
    },
  };
  const body = {};

  try {
    const response = await axios.get(url, body, config);
    console.log(response.data);
  } catch (error) {
    console.error(error);
  }
}

Returns

200
400
SwapResponse object
srcToken
any
Source token info
allOf[0]
TokenInfo object
address
* string
symbol
* string
name
* string
decimals
* number
logoURI
* string
domainVersion
string
eip2612
boolean
isFoT
boolean
tags
array
items
string
dstToken
any
Destination token info
allOf[0]
TokenInfo object
address
* string
symbol
* string
name
* string
decimals
* number
logoURI
* string
domainVersion
string
eip2612
boolean
isFoT
boolean
tags
array
items
string
dstAmount
* string
Expected amount of destination token
protocols
array
Selected protocols in a path
items
TokenSwaps object
token
* string
Source token address for the hops
hops
* array
Swap hops from source token
items
TokenHop object
part
* number
The distribution percent from source token coming to destination token on this hop
dst
* string
Destination token address
fromTokenId
* number
Source token index in the path
toTokenId
* number
Destination token index in the path
protocols
* array
The token split among different liquidity sources
items
SelectedLiquiditySource object
name
* string
The liquidity source id
part
* number
The distribution percent from total amount coming to specified destination token
tx
* any
Transaction object
allOf[0]
TransactionData object
from
* string
to
* string
data
* string
value
* string
gasPrice
* string
gas
* number
JSON
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{
  "srcToken": {
    "address": "0x111111111117dc0aa78b770fa6a738034120c302",
    "symbol": "1INCH",
    "name": "1INCH Token",
    "decimals": 18,
    "logoURI": "https://tokens.1inch.io/0x111111111117dc0aa78b770fa6a738034120c302.png",
    "domainVersion": "string",
    "eip2612": true,
    "isFoT": false,
    "tags": ["tokens"]
  },
  "dstToken": {
    "address": "0x111111111117dc0aa78b770fa6a738034120c302",
    "symbol": "1INCH",
    "name": "1INCH Token",
    "decimals": 18,
    "logoURI": "https://tokens.1inch.io/0x111111111117dc0aa78b770fa6a738034120c302.png",
    "domainVersion": "string",
    "eip2612": true,
    "isFoT": false,
    "tags": ["tokens"]
  },
  "dstAmount": "62131879850006790961",
  "protocols": [
    {
      "token": "0xeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeeee",
      "hops": [
        {
          "part": 100,
          "dst": "0x111111111117dc0aa78b770fa6a738034120c302",
          "fromTokenId": 0,
          "toTokenId": 1,
          "protocols": [
            {
              "name": "UNISWAP_V3",
              "part": 100
            }
          ]
        }
      ]
    }
  ],
  "tx": {
    "from": "0x1111111111111111111111111111111111111111",
    "to": "0x1111111254eeb25477b68fb85ed929f73a960582",
    "data": "0x0502b1c50000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000000002386f26fc10000000000000000000000000000000000000000000000000003556e53186804ca3e0000000000000000000000000000000000000000000000000000000000000080000000000000000000000000000000000000000000000000000000000000000180000000000000003b6d034026aad2da94c59524ac0d93f6d6cbf9071d7086f2",
    "value": "10000000000000000",
    "gasPrice": "6994090150",
    "gas": 121363
  }
}

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