Harvest

Harvest API v2

REST API for managing clients, projects, tasks, time entries, expenses, invoices, estimates, and users in Harvest. Supports OAuth 2.0 and Personal Access Token authentication, requires a Harvest-Account-Id header, and uses standard JSON request/response over HTTPS.

GitHub

Documentation

📖
Documentation
https://help.getharvest.com/api-v2/
📖
Authentication
https://help.getharvest.com/api-v2/authentication-api/authentication/authentication/

Other Resources

🔗
Overview
https://help.getharvest.com/api-v2/introduction/overview/general/
🔗
APIsJSON
https://raw.githubusercontent.com/api-evangelist/harvest/refs/heads/main/apis.yml

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API entry from apis.yml

apis.yml Raw ↑ 
aid: harvest:api-v2
name: Harvest API v2
description: REST API for managing clients, projects, tasks, time entries, expenses, invoices, estimates,
  and users in Harvest. Supports OAuth 2.0 and Personal Access Token authentication, requires a Harvest-Account-Id
  header, and uses standard JSON request/response over HTTPS.
humanURL: https://help.getharvest.com/api-v2/
baseURL: https://api.harvestapp.com/v2
tags:
- Time Tracking
- Project Management
- Invoicing
- Expense Tracking
- Timesheets
- Authentication
- Personal Access Token
tags_raw:
- Time Tracking
- Project Management
- Invoicing
- Expense Tracking
- Timesheets
- OAuth 2.0
- Personal Access Token
properties:
- type: Documentation
  url: https://help.getharvest.com/api-v2/
- type: Authentication
  url: https://help.getharvest.com/api-v2/authentication-api/authentication/authentication/
- type: Overview
  url: https://help.getharvest.com/api-v2/introduction/overview/general/