Root endpoint
  • HTTP is not supported. Only HTTPS.
  • The context for all resources in this endpoint is the survey indentified by authentication key.

General requirements

  • All API access is over JSON.
  • “User-Agent” header is mandatory in all requests.
  • “Content-Type : application/json” header is mandatory in all requests.


  • Use HTTP BASIC authentication. Use survey’s API key for username. Leave password empty.
curl -u sk_800089b0657fa1c9dje14af1:

Rate limits

  • Max 5000 authenticated requests per hour.
  • Max 60 unauthenticated requests per hour.
  • “X-RateLimit-Limit” header shows max requests allowed in current time interval.
  • “X-RateLimit-Remaining” header shows available requests remaining in current time interval.
  • “X-RateLimit-Reset” header shows time of next limit reset.
HTTP/1.1 200 OK
Date: Tue, 23 May 2017 07:45:51 GMT
Content-Type: application/json
Content-Length: 2675
Connection: keep-alive
Vary: Accept-Encoding
X-RateLimit-Limit: 5000
X-RateLimit-Remaining: 4992
X-RateLimit-Reset: 1495526400000

Request size limit

  • Max request size allowed is 50 MB.

Pretty print

  • Add parameter “pretty” to get pretty printed response.

Error codes

HTTP code Message
401 Invalid API Key.
401 API key not provided.
400 Badly formed JSON.
404 Non-existent resource is requested.
405 Method not allowed.
422 Unprocessable request. Due to wrong data type or erroneous expression.
429 Too many requests.

API Error codes

Code Message Description
1000 Error Default error.
1001 Invalid format Invalid format of data.
1002 Already exists Property already exists with different data type.
1003 Quota exceeded Property quota exceeded. Max 50 properties per survey.
1004 Duplicate request A survey for same transaction_id was already sent.
1006 Required property missing One or more required property is missing.
1007 Email already unsubscribed Email was unsubscribed in a previous API request.
1008 Error while checking email exists Email validation failed due to internal server error.
1009 Invalid Value Value is incorrect for a given field.
1010 Invalid survey id.  
1012 Invalid survey type $transaction_id, $transaction_date, $transaction_currency and $transaction_amount supported only for transactional surveys.
1013 Invalid key Provided key is not supported.