Harvest

Manage Harvest (time tracking, projects, clients, invoices, expenses) from any AI agent. 10 tools, Bearer auth with account-ID header.

7-day free trial · No credit card · EU-hosted

Ask Harvest anything

Try a real prompt against Harvest via AnythingMCP — Claude calls the tools, returns the answer. Press Enter on your own message to install on Cloud.

Harvest · live via MCP

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Step-by-step setup for the most popular AI clients.

From the connector definition itself: where to find the credentials, what they need to be allowed to do, and which API this adapter talks to.

This connector wraps the Harvest API v2 (api.harvestapp.com/v2).

Setup:

Log into https://id.getharvest.com → bottom-left avatar → Developers → Create new personal access token.
Copy the token and the Account ID shown on the same page (a 7-digit number like 1234567).
Set both: HARVEST_ACCESS_TOKEN and HARVEST_ACCOUNT_ID.

Authentication: every request requires BOTH:

Authorization: Bearer ${HARVEST_ACCESS_TOKEN}
Harvest-Account-Id: ${HARVEST_ACCOUNT_ID}
A User-Agent header (Harvest API requires it — the adapter sets AnythingMCP ([email protected])).

Missing the account header returns 401 Unauthorized even with a valid token — confusing but documented.

Hierarchy: Client → Project → Task assignment → Time entry. To log time, you need the project ID + task ID. List projects to find IDs.

Dates are ISO 8601 (2026-05-20). spent_date on a time entry is required.

Pagination: page (1-based) + per_page (max 100). Total in total_pages.

Rate limits: 100 req / 15s per account; 1k req / 15s globally per token. 429 returns no Retry-After — back off 15s.

Out of scope here: invoice line CRUD beyond list/get, estimates, contacts, expenses categories management, recurring schedules.

Install the connector, paste your credentials, ask your AI a question. 7-day free trial, no credit card.