API Guide > Technical Reference > HTTP Status Codes
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LiquidPlanner uses a RESTful web service API. You can download the API Guide (PDF) for offline reference. Most actions that you can perform within the application can be automated using the API -- for example, you can create a task, comment on the task, track time against it, and then mark it done.
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Check the HTTP status code of responses from the API to determine whether your request was processed successfully.
Success Codes
- 200 OK
- successful read, update, or delete
- 201 Created
- successful create
Error or Exception Codes
- 400 Bad Request
- unrecognized or invalid request URL
- 401 Unauthorized
- credentials not provided or are incorrect
- 422 Unprocessable Entity
- unsuccessful create, update, or delete; syntactic or validation error
- 404 Not Found
- record does not exist, or you do not have permission to access it
- 500 Internal Server Error
- unexpected error; you’ve likely found a bug in LiquidPlanner
- 501 Not Implemented
- you asked for an API version that is not implemented (either because it does not exist, or it has been deprecated)
- 503 Service Unavailable
- API is disabled globally, or your account is throttled; check the error in the response body
