Harvest MCP Server

MCP server for Harvest — the popular time tracking and invoicing SaaS. Enables AI agents to log time entries, manage projects and tasks, create invoices, query timesheets, and access Harvest reports. Supports automated time tracking workflows for teams using Harvest for billing and project management.

Evaluated Mar 06, 2026 (0d ago) vcurrent

Homepage ↗ Repo ↗ Productivity harvest time-tracking invoicing billing productivity mcp-server

⚙ Agent Friendliness

/ 100

Can an agent use this?

🔒 Security

/ 100

Is it safe for agents?

⚡ Reliability

/ 100

Does it work consistently?

Score Breakdown

⚙ Agent Friendliness

MCP Quality

Documentation

Error Messages

Auth Simplicity

Rate Limits

🔒 Security

TLS Enforcement

Auth Strength

Scope Granularity

Dep. Hygiene

Secret Handling

OAuth 2.0. Billing data sensitive. Time entry integrity important for invoicing accuracy.

⚡ Reliability

Uptime/SLA

Version Stability

Breaking Changes

Error Recovery

Best When

A freelancer, agency, or team using Harvest for time tracking wants AI agents to log time, query timesheets, and automate billing workflows.

Avoid When

You don't use Harvest. Also: time entries drive real invoicing — review agent-logged time before billing clients.

Use Cases

• Logging time entries to Harvest from productivity agents based on work sessions
• Querying Harvest timesheets and generating billing reports from finance agents
• Managing Harvest projects and tasks from project management agents
• Automating invoice creation from tracked time in Harvest

Not For

• Teams using Toggl, Clockify, or other time tracking tools
• Fully automated time tracking without human review for billing (financial accuracy matters)
• Non-Harvest time tracking workflows

Interface

REST API

Yes

GraphQL

gRPC

MCP Server

Yes ↗

SDK

Webhooks

Yes

Authentication

Methods: oauth api_key

OAuth: Yes Scopes: Yes

Harvest OAuth 2.0 or personal access token. Harvest developer account required for OAuth app registration.

Pricing

Model: subscription

Free tier: Yes

Requires CC: No

Harvest has a free tier for solo users. Team use requires paid subscription. MCP server is free open source.

Agent Metadata

Pagination

page

Idempotent

Partial

Retry Guidance

Not documented

Known Gotchas

⚠ FINANCIAL RISK: Time entries directly drive client invoicing — agent errors can affect billing accuracy
⚠ Harvest rate limit is 100 requests/15 seconds — batch operations can hit this quickly
⚠ Time entries require project_id and task_id — agent must have valid IDs for logging
⚠ Review agent-logged time before generating invoices to avoid billing disputes

Alternatives

toggl-mcp-server clockify-mcp-server linear-mcp-server

Full Evaluation Report

Detailed scoring breakdown, competitive positioning, security analysis, and improvement recommendations for Harvest MCP Server.

$99

API endpoint ↗ Agent guide ↗ Report inaccuracy

Scores are editorial opinions as of 2026-03-06.