This MCP (Model Context Protocol) server provides integration with the Harvest time tracking and project management API. It allows Claude and other
This MCP (Model Context Protocol) server provides integration with the Harvest time tracking and project management API. It allows Claude and other MCP-compatible AI assistants to interact with your Harvest account, helping you manage time. The harvest mcp server wraps that behind the Model Context Protocol, so an assistant can use it through 7 defined tools rather than through you.
Everything the assistant can do here goes through one of these:
macOS — ~/Library/Application Support/Claude/claude_desktop_config.jsonUsers — The Users tool exposed by this serverProjects — The Projects tool exposed by this serverClients — The Clients tool exposed by this serverTasks — The Tasks tool exposed by this serverEstimates — The Estimates tool exposed by this serverPrerequisites — The Prerequisites tool exposed by this serverSetup follows the usual MCP pattern — install or clone the server, register it in your client's configuration file, restart the client. The configuration blocks on this page cover the common clients.
You will need 3 environment variables: HARVEST_ACCOUNT_ID, HARVEST_API_KEY, HARVEST_READ_ONLY. The server will not start without them, which is usually why the tools fail to appear on a first run. Keep credentials in your client's env block or a secrets manager rather than in a file you might commit.
Plenty of planning and project tracking servers cover similar ground. The differences that matter in practice are scope of access and how much setup stands between you and a working tool call. Harvest's toolset — macOS, Users, Projects and 4 more — is a fair guide to whether it matches your workflow. It is maintained by taiste; worth a glance at recent repository activity before you build anything load-bearing on it.
SyncDev reviews every entry in this directory against the project's own documentation before publishing, and revisits them as servers change.
| Tool | What it does |
|---|---|
| macOS | ~/Library/Application Support/Claude/claude_desktop_config.json |
| Users | The Users tool exposed by this server. |
| Projects | The Projects tool exposed by this server. |
| Clients | The Clients tool exposed by this server. |
| Tasks | The Tasks tool exposed by this server. |
| Estimates | The Estimates tool exposed by this server. |
| Prerequisites | The Prerequisites tool exposed by this server. |
{
"mcpServers": {
"harvest": {
"command": "uv",
"args": [
"run",
"--directory",
"change_directory",
"harvest-mcp-server.py"
],
"env": {
"HARVEST_ACCOUNT_ID": "account_id",
"HARVEST_API_KEY": "api_key"
}
}
}
}Configuration as documented by the project. Restart the client after saving.
| Variable | Description | Required |
|---|---|---|
| HARVEST_ACCOUNT_ID | Configuration value read at startup. | Optional |
| HARVEST_API_KEY | Credential the server authenticates with. | Yes |
| HARVEST_READ_ONLY | Configuration value read at startup. | Optional |
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