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Most common errors in REST API:

HTTP Status Code Message Text Resolution
400 Bad Request Invalid format for request

1. Verify that your request includes valid parameters or values.

2. Verify that the grant_type in the request payload.
400   ERR.2SG.CLIENT.INVALID_REQUEST Verify that your request includes valid parameters or values. Check API documentation.
401 Unauthorized Not authorized to make this request. Check access level and refer to API documentation for access information. Verify your token credentials.
401 Unauthorized invalid_client

1. Verify your token credentials.

2. Verify TAM Pool details. The error may occur when TAM Pool is exhausted. 
401 Unauthorized Credentials are missing or the syntax is not correct Verify that your base64-encoded token credentials were constructed properly.
401 Unauthorized Wrong clientID or clientSecret Verify password for the client ID.
401 Unauthorized ERR.2SG.SEC.MISSING_CREDENTIALS Verify whether you use the correct data type.
401 Unauthorized ERR.2SG.SEC.INVALID_CREDENTIALS Verify your token credentials.
403 Forbidden Request is for a resource that is forbidden

1. Verify that your token credentials allow authorization to call this API.

2. Contact your Sabre account manager to verify access.
403   ERR.2SG.SEC.NOT_AUTHORIZED

1. Verify that your token credentials allow authorization to call this API.

2. Contact your Sabre account manager to verify access.
403   ERR.2SG.CLIENT.SERVICE_UNKNOWN

1. Verify whether the URL is valid.

2. Verify whether your request includes the required segments such as version number. Check API documentation.
404 Not Found Response does not contain any data

1. No data found to fulfill the request. You might consider using fewer parameters/filters.

2. URL includes missing segments such as version number. Check API documentation.

3. Verify whether the URL is valid.
405 Method Not Allowed   Method is not valid or authorized for this endpoint. Check API documentation.
406 Not Acceptable Requested resource is only capable of generating content not acceptable according to the Accept headers sent in the request.  
413   ERR.2SG.CLIENT.INVALID_REQUEST

1. Request URL is too long.

2. Reduce the number of request parameters in the URL. Separate parameters into multiple requests.
413 FULL head  

1. Request URL is too long.

2. Reduce the number of request parameters in the URL. Separate parameters into multiple requests.
429 too many requests temporarily_unavailable

1. Internal limit has been exceeded.

2. Wait at least 500 milliseconds and resend the request.
429 Throttled Active token count is exceeded

1. Maximum number of concurrent requests for the API has been exceeded. Contact your Sabre account manager to determine or increase your allocated concurrent request limit for this API.

2. Wait at least 500 milliseconds and resend the request.
429   ERR.2SG.GATEWAY.REQUEST_THROTTLED

1. Maximum number of concurrent requests for the API has been exceeded. Contact your Sabre account manager to determine or increase your allocated concurrent request limit for this API.

2. Wait at least 500 milliseconds and resend the request.
500 Server Error  

1. API encountered an unexpected condition that prevented it from fulfilling the client's request.

2. Wait at least 500 milliseconds and resend the request.
500   ERR.2SG.SEC.INTERNAL_PROCESSING_ERROR

1. API encountered an unexpected condition that prevented it from fulfilling the client's request.

2. Wait at least 500 milliseconds and resend the request.
500   ERR.2SG.GATEWAY.TIMEOUT Wait at least 500 milliseconds and resend the request.
500   ERR.2SG.GATEWAY.INTERNAL_PROCESSING_ERROR Wait at least 500 milliseconds and resend the request.
500   ERR.2SG.GATEWAY.INVALID_PROVIDER_RESPONSE

1. The server cannot understand the response of the service because of bad format or failure to comply with protocol. Contact the Sabre support desk.

2. Wait at least 500 milliseconds and resend the request.
500   ERR.2SG.GATEWAY.PROVIDER_CONNECTION_ERROR

1. Your request encountered a transport error.

2. Wait at least 500 milliseconds and resend the request.
500 Connection error ERR.2SG.PROVIDER_CONNECTION_ERROR

1. Your request encountered a transport error.

2. Wait at least 500 milliseconds and resend the request.
503 Service Unavailable Server is currently unavailable. Please try again later and report if the problem persists. Wait at least 500 milliseconds and resend the request.
504 Gateway Timeout Server timed out trying to fulfill the request. Please try again later and report if the problem persists. Wait at least 500 milliseconds and resend the request.
Error Cause Resolution
No Availability

Either your PCC is not enabled to consume BFM or the tier level (50, 100, 200) you specified does not match your BFM agreement.

1. Ensure your PCC is enabled to consume BFM. Contact your Sabre account manager to validate if your PCC has been configured to consume BFM.

2. Adjust the BFM tier level to the appropriate one according to your BFM agreement.

NO FLIGHT SCHEDULES FOR QUALIFIERS USED

No flights results could be found with the qualifiers used in your request.

 Review the qualifiers used on your request to ensure those are not overly-restrictive – Example, requesting non-stop flights in a route where non-stop flight do not operate.

    Communication error code=104: Connection reset by peer

    		 Temporary internal processing error.

    1. Retry your request.

    2. Contact Sabre support if the error persists.

    Communication error: Transmission timeout

    		 Temporary internal processing error.

    1. Retry your request.

    2. Contact Sabre support if the error persists.
      DSF server returned an error: Insufficient resources to process the request Temporary internal processing error.

      1. Retry your request.

      2. Contact Sabre support if the error persists.

        MAX NBR COMBINATIONS EXCEEDED

        		 Temporary internal processing error.

        1. Retry your request.

        2. Contact Sabre support if the error persists.