error_code field (integer), an error_message field describing the issue, and an error_id field you can use to trace the request in Cobo’s logs.
Error codes
General API errors
| Error code | HTTP status | Description | Solution |
|---|---|---|---|
| 2006 | 400 | One or more parameters are in an invalid format or contain unsupported values. | Validate your request body against the API reference. Check parameter types, enum values, and all required fields. The error_message field usually names the specific parameter that failed validation. |
| 2010 | 429 | You have exceeded the API access rate limit. | Reduce request frequency. Implement exponential backoff with jitter before retrying. |
| 2024 | 401 | API key authentication failed. |
|
| 2025 | 403 | Your API key does not have the permission required to perform this action. | Check the OAuth scopes and roles assigned to your API key in Cobo Portal. Refer to Roles and permissions for details. |
| 2026 | 429 | Too many requests. Your request rate has exceeded the server-side threshold. | Wait before retrying. Use a retry strategy with exponential backoff. |
| 2027 | 400 | You have exceeded your quota limit for this resource or operation. | Check your current usage and package limits in Cobo Portal under Settings > Developer. |
| 2028 | 404 | The requested resource was not found. | Verify that the resource ID in your request (for example, merchant_id, order_id, payer_id) is correct and belongs to your organization. |
| 2029 | 400 | The resource is in an invalid status for the requested operation. Common causes: (1) updating a transaction description before the transaction reaches Completed, Rejected, or Failed status; (2) cancelling a transaction export that is not currently in Generating status; (3) your payment developer account is not in an active state. | Check the error_message field for the specific cause. For transaction description updates, wait until the transaction reaches a terminal status. For export cancellation, verify the export is still generating. |
| 2040 | 400 | A duplicate key was detected. A record with this identifier already exists. | Use a different unique identifier for the new record. |
Payment resource errors
Payment-specific validation failures — such as a resource not being found or a field value being rejected — all return"error_code": 2006. Use the error_message field in the response to identify the specific cause.
| Scenario | Example error_message | Solution |
|---|---|---|
| Merchant not found | Merchant {merchant_id} not found. | Verify the merchant_id value is correct and belongs to your organization. |
| Order not found | Order {order_id} not found. | Verify the order_id value. Orders are scoped to the merchant — confirm the order belongs to the merchant you specified. |
| Topup payer not found | Topup payer {payer_id} not found. | Verify the payer_id value. Payers are created per merchant. |
| Token not supported | Unsupported token {token_id} | Verify the token ID is correct and the token is enabled for your organization. |
| Fiat currency not supported | Unsupported fiat currency: {currency} | Use a supported fiat currency code. Check the API reference for accepted values. |
| Invalid amount format | Invalid amount format: {amount} | Provide a valid decimal string, for example "10.50". Do not pass integers or scientific notation. |
| Amount below minimum | Message includes the minimum amount and token symbol. | Increase the amount to meet or exceed the minimum threshold shown in the error message. |
| Bank account not found | Bank Account with account_uuid: {id} not found. | Verify the bank_account_id value is correct and belongs to your organization. |
| Bank account not approved | Bank account {id} is not approved. | Ensure the bank account has completed verification and approval before using it in a request. |
| OTC wallet not found | Wallet {wallet_id} unsupported or not found. | Verify the wallet_id value. Not all wallet types support OTC conversions. |
| Invalid receiving address | Invalid receiving address. | Check the destination address format and confirm it is compatible with the specified token and chain. |
| Insufficient OTC balance | Message describes the shortfall. | Check the available OTC balance before submitting the conversion request. |
| OTC amount below minimum | Message includes the minimum amount. | Increase the conversion amount to meet the minimum shown in the error message. |
| OTC exchange rate unavailable | Exchange rate for token {token_id} not found. | Retry the request. If the error persists, the token may not be supported for OTC conversion. |
| OTC conversion not found | Conversion {conversion_code} not found. | Verify the conversion code or OTC order ID is correct. |
Authentication and permissions
| Error code | HTTP status | Description | Solution |
|---|---|---|---|
| 2001 | 400 | MFA verification is required before this action can be performed. | Complete MFA verification in Cobo Portal, then retry the request. |
| 4001 | 403 | Forbidden access to the requested resource. | Check the permissions associated with your API key. Refer to Roles and permissions for details. |
| 4002 | 400 | Your organization status does not permit this action. Your developer account may be under review or not fully activated. | Verify that your developer onboarding is complete. If the error persists, your account may have been restricted — check for any notifications in Cobo Portal. |
| 10000 | 400 | Your organization has read-only permissions in Cobo Portal and cannot perform write operations. | Contact your organization admin to review the account permissions in Cobo Portal. |
Quota and resource limits
| Error code | HTTP status | Description | Solution |
|---|---|---|---|
| 3000 | 400 | You have used all available test token claims. The test coin faucet is limited to 10 claims per organization. | Test token claim limits cannot be increased. Use your existing test tokens to continue testing. |
Transfer and transaction errors
These error codes are returned when initiating transfers, settlements, or withdrawals.| Error code | HTTP status | Description | Solution |
|---|---|---|---|
| 30001 | 400 | Duplicate request_id. This request_id has already been used in a previous request. | Each request must use a unique request_id. If you are retrying a request, reuse the same request_id to retrieve the original result instead of generating a new one. |
| 30002 | 400 | Unknown token ID. The specified token is not recognized. | Verify the token ID against the list of supported tokens. Call List supported tokens to retrieve valid token IDs for your organization. |
| 30005 | 400 | The address format is invalid or not compatible with the specified token. | Verify that the destination address is correctly formatted for the token’s network. Confirm the address belongs to the correct chain. |
| 30007 | 400 | Invalid amount. The amount value is not a valid number. | Provide a valid numerical amount. Ensure you are not passing a string, null, or a value in scientific notation. |
| 30009 | 400 | The amount cannot be less than zero. | Provide a positive amount value. |
| 30010 | 400 | The transfer amount is below the minimum withdrawal threshold. The error_message field includes the minimum amount and token symbol. | Increase the transfer amount to meet or exceed the minimum threshold shown in the error message. |
| 30012 | 400 | The amount exceeds the available balance in the source wallet. | Check the wallet balance before submitting the transfer. Reduce the transfer amount or top up the wallet. |
| 30013 | 400 | The fee token balance is insufficient to cover the transaction fee. | Check your fee station balance in Cobo Portal under Fee Station and recharge if needed. |
| 30019 | 400 | The transaction was rejected by an on-chain transaction policy. | Review the on-chain transaction policies configured for your Smart Contract Wallet in Cobo Portal. Adjust the policy or use a different wallet. |
| 30024 | 400 | Neither to_address nor to_wallet_id was provided. One of the two is required. | Include either to_address or to_wallet_id in your request. |
| 30028 | 400 | The request_id parameter is missing or malformed. | Include a valid request_id in your request. The value must be a non-empty string. |
| 30030 | 400 | Withdrawal and deposit services for this token are temporarily unavailable. | Check the Cobo status page for active service notices. Retry after the suspension is lifted. |
| 30031 | 400 | The token is not enabled for your organization. | Call List supported tokens to verify that the token is available for your account. If it does not appear, the token has not been activated for your organization. |
| 30036 | 400 | The fee station balance is insufficient to cover the transaction fee. | Top up your fee station with a supported token (for example, USDT or USDC) to ensure sufficient balance for transaction fees, then retry. |
| 30038 | 400 | The fee station token balance is insufficient to cover the transaction fee. | Top up your fee station with a supported token (for example, USDT or USDC) to ensure sufficient balance for transaction fees, then retry. |
| 30039 | 400 | Cobo’s fee station balance is temporarily insufficient. | Retry the transfer after a short wait. This condition is resolved by Cobo automatically. |
Transaction operation errors
These error codes are returned when cancelling, dropping, or speeding up an existing transaction.| Error code | HTTP status | Description | Solution |
|---|---|---|---|
| 60003 | 400 | Failed to estimate the transaction fee. | Retry the fee estimation. If the error persists, verify the token and wallet are properly configured. |
| 60004 | 400 | This transaction cannot be cancelled. | Only transactions in a pending or processing state can be cancelled. Check the transaction status before attempting to cancel. |
| 60005 | 400 | The current transaction status does not allow cancellation. | The transaction has progressed past the point where cancellation is possible. Check the transaction status in Cobo Portal. |
| 60006 | 400 | This transaction cannot be dropped. | Dropping is only available for specific transaction types and statuses. Check the transaction details in Cobo Portal. |
| 60007 | 400 | This transaction cannot be sped up. | Speed-up is only available for specific transaction types and statuses. Check the transaction details in Cobo Portal. |
HTTP status codes
| Status code | Description | Solution |
|---|---|---|
| 200 | OK. | N/A |
| 400 | Bad request. | Check the request parameters. |
| 401 | Unauthorized. | Check the API key, API signature, or timestamp. |
| 403 | Forbidden. | Ensure you have the required permissions. |
| 404 | Not Found. | Check the request URL. |
| 405 | Method Not Allowed. | Use a supported HTTP method. |
| 406 | Not Acceptable. | Ensure the request content format is JSON. |
| 429 | Too Many Requests. | Reduce request frequency and try again later. |
| 500 | Internal Server Error. This error can be caused by several issues. | Check your server configuration settings and try again later. |
| 502 | Bad Gateway. | Check the connectivity and try again later. |
| 503 | Service Unavailable. | Try again later. |