Each API call returns an HTTP status code that reflects the nature of the response. We have done our best to follow the 

 conventions.Any request that did not succeed will return a 4xx or 5xx error. The 4xx range means there was a problem with the request, like a missing parameter. The 5xx range means that something went wrong on our end.Salesmachine API returns the following codes:

Learn about the HTTP status codes used in the Salesmachine API to troubleshoot issues while making requests. This document provides a comprehensive list and meanings of specific status codes, including 4xx errors for request problems and 5xx errors for se

HTTP Responses

Changelog

Successeve API references

Developer zone

Introduction

Rate limits

Pagination

Archiving and Deleting

Authentication

Contact

Account

Event

Tracking API

Contacts

Accounts

Notes

Tasks

Activities

Users

Access API

API version 2.0

Code	Meaning
200	OK – Request succeeded
201	Created – A resource was created
400	Bad Request – Incorrect or missing API key
401	Unauthorized – Your API key is wrong
404	Not Found – The specified url could not be found
405	Method Not Allowed – You tried to access our api with an invalid method
406	Not Acceptable – You requested a format that isn’t json
429	Too Many Requests – You’re sending too many requests! Slow down, or if you have a high traffic webapp, contact us :-)
500	Internal Server Error – We had a problem with our server. Try again later.
503	Service Unavailable – We’re temporarily offline for maintenance. Please try again later.