---
title: "Zeo Route Planner API - Errors | Fleet Management & Route Optimization API"
author: Zeo Route Planner Team
description: “The Errors section explains how Zeo API responds when something goes wrong, with codes and messages that help developers troubleshoot quickly.”
tags: [API documentation, errors, error codes, fleet management, route optimization, route management, Zeo, API errors, HTTP status codes]
url: https://api.zeorouteplanner.com/errors.html
canonical_url: https://api.zeorouteplanner.com/errors.html
layout: page
---
# Errors API Documentation

**API Docs / Errors**

The Zeo Route Planner API uses error codes, bad requests, unauthorized, not found, internal server error, and service unavailable.

{{base_ur}}="https://zeorouteplanner.com/"

## Error Codes

The following are the error codes:

| Error Code | Meaning |
|------------|---------|
| 400 | Bad Request -- Your request is invalid. |
| 401 | Unauthorized -- Your API key is wrong. |
| 404 | Not Found -- The specified request could not be found. |
| 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. |

![A graphic illustrating a successful JSON API response after creating a new driver, with the returned data matching the 'Driver Details' form](https://zeorouteplanner.com/wp-content/uploads/2024/07/Add-driver.png)