Introduction

Build powerful integrations with the Kliio API

Welcome to Kliio

Kliio is a freelancer management platform covering invoicing, quotes, client management, and projects. The Kliio API lets you integrate these capabilities into your own applications, portals, or workflows.

Authentication

Generate an API key and start making authenticated requests

API Reference

Explore the full endpoint reference with request and response examples

Base URL

All API requests are made to:

https://kliio.app/api/v1

Response format

All responses are JSON. Successful responses include a data field containing the result. Errors include an error field with a human-readable message.

// Success
{
  "data": { ... }
}

// Success (created)
{
  "success": true,
  "data": { ... }
}

// Error
{
  "error": "Description of what went wrong"
}

HTTP status codes

Code	Meaning
200	OK
201	Created
400	Bad Request — invalid parameters or validation failure
401	Unauthorized — missing or invalid API key
404	Not Found — resource doesn’t exist or belongs to another account
500	Internal Server Error