If you're encountering issues with our API, this guide will help you understand some common error messages and their meanings.
General Errors
400 - Bad Request: This indicates an incorrect parameter. Ensure that all required parameters are correctly set.
429 - Rate Limit: You've made too many requests to the API within a 1 second time period. Reduce your requests per second (RPS) to stay below the free 1rps limit. If higher limits are required, please check out the current 1inch API Plans .
503 - Banned IP: The IP address you're using to access the API is banned. Please ensure you're adhering to 1inch Network's terms of use.
Specific Errors
Cannot sync token: The token either doesn't exist on the blockchain or isn't a valid token. Also, double check that you are using the correct chainID in relation to the token used.
Amount is not set: The 'amount' field hasn't been specified.
***Please note: All token amounts must be in the correct decimal format! The decimal format can be found by looking up the token contract on the block explorer.
Example: If the source token is DAI, and you are sending 1 DAI, the amount with 18 decimals would be 1000000000000000000.
https://etherscan.io/token/0x6b175474e89094c44da98b954eedeac495271d0f
Src is not set: The 'src' (source token contract) field is missing.
Dst is not set: The 'dst' (destination token contract) field is missing.
Insufficient liquidity: The aggregator can't find a route for the swap due to low liquidity.
Swap-specific Errors
400 - Bad Request: This will be similar to the general 400 error; however, these error messages will also specify a missing parameter or more details of the problem.
Not enough src balance: This means your source token balance is insufficient. It provides the required amount and your current balance.
Not enough Allowance: You haven't granted the necessary token allowance to the 1inch router. It'll indicate the amount, current allowance, and the spender address, e.g., "Spender: 0x1111111254eeb25477b68fb85ed929f73a960582".
Insufficient liquidity: As mentioned earlier, the aggregator couldn't route the swap.
*** Please note: This list is not comprehensive. Other errors involving the dynamics of generic EVM transaction estimations might require deeper investigation.
Questions, comments, concerns? Feel free to reach out to our support team by clicking the live chat below.