Tharstern MCP by usefulapi

Tharstern MCP by usefulapi

Use your Tharstern account from Claude, Cursor, or any MCP client. Read customers, jobs, estimates, orders, invoices, stock, prices and operator work, all read-only. Hosted, no local install: connect with your own credentials.

Live endpoint: https://tharstern.usefulapi.io/mcp · Homepage: https://usefulapi.io

Connect

• Claude (claude.ai, Desktop): open Customize → Connectors, click + Add → Add custom connector, and paste https://tharstern.usefulapi.io/mcp.
• Claude Code: claude mcp add --transport http tharstern https://tharstern.usefulapi.io/mcp, then run /mcp to log in.
• VS Code: Add to VS Code.
• Cursor and other clients: add the URL as a remote MCP server:

{
  "mcpServers": {
    "tharstern": {
      "url": "https://tharstern.usefulapi.io/mcp"
    }
  }
}

Add only the URL. Do not add an Authorization header or an API key to the client config: the server signs you in with OAuth, and the login page asks for your Tharstern credentials.

Step-by-step setup, where to find your credentials, and FAQ: https://usefulapi.io/tharstern/

On first connect you provide your Tharstern user email and Tharstern password of a user enabled for API access (the password is not stored). The server validates it and stores only the access token per user. No keys go in config files.

Tools

Tool	Type	What it does
tharstern_list_customers	read	List customers
tharstern_list_suppliers	read	List suppliers
tharstern_list_estimates	read	List estimates
tharstern_list_jobs	read	List jobs
tharstern_list_orders	read	List sales orders
tharstern_list_delivery_notes	read	List delivery notes
tharstern_list_invoices	read	List invoices
tharstern_list_purchase_orders	read	List purchase orders
tharstern_list_products	read	List products and stock
tharstern_get_product_price	read	Get product price
tharstern_list_stock_locations	read	List stock locations
tharstern_list_projects	read	List projects
tharstern_list_tasks	read	List tasks
tharstern_list_notes	read	List notes
tharstern_list_operators	read	List operators
tharstern_list_working_operations	read	List working operations
tharstern_list_milestones	read	List milestone definitions
tharstern_list_currencies	read	List currencies
tharstern_get_licence	read	Get licence details
tharstern_usage_status	meta	Usage status (free-tier meter)
tharstern_request_feature	meta	Request a missing feature
tharstern_upgrade	meta	Upgrade to Pro (unlimited*)
tharstern_cancel_subscription	meta	Cancel the Pro subscription

read tools are read-only; write tools mutate data (clients should confirm them); meta tools report usage, manage your subscription or send a feature request.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Pro (per user)	$9/mo or $90/yr (2 months free)	Unlimited*

*Pro has a fair use limit of 10,000 tool calls a month on this server. For more, write to [email protected].

Pro covers this server only. Subscribe with tharstern_upgrade (it returns a Stripe Checkout link). Cancel any time with tharstern_cancel_subscription: Pro continues to the end of the paid period, with no refund for the current period, and running tharstern_upgrade before then undoes the cancel. Or write to [email protected].

License

MIT — see LICENSE. Documentation only; the server is hosted.