Hobok MCP server

Read invoices, customers and products; issue invoices and record payments in Hobok. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect HobokFree 50 tool calls / monthPro $9/mo · $90/yr · pricing15 tools

What can I ask?

Turn on the Hobok connector, then ask in plain words. The AI picks the tools.

Which invoices are still open, and what is their total?
Issue an invoice to customer 12 for 3 hours of consulting at 800 SEK, due in 30 days.
Mark invoice 2026-0042 as paid by Swish today.
List the saved products with their prices.

What you can do with Hobok in Claude and ChatGPT

For Swedish hobby businesses that invoice clients and track payments in Hobok.

Find open invoices and their totals

List invoices by status: sent, paid or credited. Open one for its lines, totals, status and the emails sent.

Issue an invoice to a saved customer

Issue a sent invoice for a saved customer or a one-off buyer. It takes the next invoice number, which cannot be reused.

Changes data

Record a payment on a sent invoice

Mark a sent invoice as paid with a payment method. Hobok books the income for the year. Then queue the receipt email if the buyer needs it.

Changes data

Keep saved customers and products up to date

Add a saved customer or a product with its price in SEK, so later invoices can use them.

Changes data

How do I connect Hobok?

Before you connect

The login page asks for your Hobok API key.

Create it in Hobok → Inställningar → API. Hobok shows the key only once. The API needs the Plus plan. Your key is used only to call the API on your behalf and to derive a private account id; it is never shown to anyone.

Claude claude.ai · Desktop

Open Customize → Connectors, then click + Add → Add custom connector.
Enter the name Hobok and this URL, then click Add:
https://hobok.usefulapi.io/mcp
Claude opens the login page: enter your Hobok API key.
In a chat, click + → Connectors and turn on Hobok.

Team and Enterprise: an Owner adds the connector for the organization first.

ChatGPT chatgpt.com

Open Plugins, click +, then Add custom MCP server.
Enter the name Hobok and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://hobok.usefulapi.io/mcp
ChatGPT opens the login page: enter your Hobok API key.
In Plugins, install Hobok, then choose it in a chat.

No Add custom MCP server option? It depends on your account or workspace settings: see OpenAI's guide.

Claude Code

Run this command, then run /mcp in Claude Code to log in:

claude mcp add --transport http hobok https://hobok.usefulapi.io/mcp

Cursor

Add to Cursor or add this to ~/.cursor/mcp.json:

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

VS Code

Add to VS Code or add this to .vscode/mcp.json:

{
  "servers": {
    "hobok": {
      "type": "http",
      "url": "https://hobok.usefulapi.io/mcp"
    }
  }
}

Codex

Run these commands. The second one opens the login page:

codex mcp add hobok --url https://hobok.usefulapi.io/mcp

codex mcp login hobok

Other clients

Windsurf, Cline, Zed and other MCP clients: add this URL as a remote MCP server (Streamable HTTP). The client then opens the login page in your browser.

https://hobok.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: the login page asks for your Hobok API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

Pricing

Plan	Price	Limit
Free	$0	50 tool calls / month
Proper user	$9/mo · $90/yr	10,000 tool calls / month
Pro+per user	$39/mo · $390/yr	100,000 tool calls / month

Each paid plan covers this Hobok server only. Ask your AI to run hobok_upgrade and choose Pro or Pro+, billed monthly or yearly (it returns a Stripe Checkout link). If you already have Pro, ask to change it to Pro+. The change requires your confirmation, keeps your billing interval and charges the price difference for the rest of the period immediately. Cancel any time with hobok_cancel_subscription: your paid plan continues to the end of the paid period, with no refund for the current period, and asking to resume the same plan with hobok_upgrade before then undoes the cancel. Or write to [email protected].

Tools 15

Show all 15 tools (the AI picks them for you)

Read only · 6

Get the connected hobby businesshobok_get_me
Show the hobby business this API key is bound to, the plan, the next invoice number, the payment terms and the currency.
List payment methodshobok_list_payment_methods
List the payment method values that hobok_mark_invoice_paid accepts. Each value is in Swedish and is printed on the receipt.
List invoiceshobok_list_invoices
List invoices, optionally by status (sent, paid, credited). Each invoice has its number, buyer, lines, totals and dates.
Get an invoicehobok_get_invoice
Fetch one invoice with its lines, totals, status and emails sent.
List customershobok_list_clients
List the saved customers of the hobby business. Use an id from this list as client_id in hobok_create_invoice.
List productshobok_list_products
List the saved products and services of the hobby business, with their prices.

Changes data · 5

Issue an invoicehobok_create_invoice
Issue an invoice with status sent. It takes the next invoice number, which cannot be reused. Give client_id for a saved customer, or buyer for a one-off buyer, not both. VAT is always 0. The invoice is emailed only when send_email is true. POST /v1/invoices with an Idempotency-Key. Retrying the same request with the same key does not issue a second invoice. Two separate invoices with the same content need different idempotency_key values, or the second call returns the first invoice. A network or timeout error does not say whether the record was saved: list the records first before you retry.
Mark an invoice paidhobok_mark_invoice_paid
Record that a sent invoice was paid. Hobok creates the receipt and books the income for the year. Only a sent invoice can be marked paid; any other status returns 409. POST /v1/invoices/{local_id}/mark-paid with an Idempotency-Key. Use hobok_list_payment_methods for payment_method values. A network or timeout error does not say whether the record was saved: list the records first before you retry.
Email a receipthobok_email_receipt
Queue the payment receipt of a paid invoice for delivery to the buyer. A 200 means queued, not delivered. The API has no idempotency key here: a retry can send the receipt twice, so check hobok_get_invoice first.
Add a customerhobok_create_client
Add a saved customer with a name and optional address and contact fields. POST /v1/clients. Hobok documents no idempotency key here. A network or timeout error does not say whether the record was saved: list the records first before you retry.
Add a producthobok_create_product
Add a saved product or service with its price in SEK. POST /v1/products. Hobok documents no idempotency key here. A network or timeout error does not say whether the record was saved: list the records first before you retry.

Your usefulapi plan · 4

Usage status (free-tier meter)hobok_usage_status
Report the caller's current usage: the plan, calls used this month, the limit of the plan (the free monthly cap or the Pro fair use limit), remaining, and whether the limit is reached. Read-only; does not count against the meter.
Request a missing featurehobok_request_feature
Tell usefulapi that the user needs something the Hobok tools cannot do yet (a missing tool, field or filter). Call it only when the user asks for something none of the tools can do, and tell the user that you send the request. Do not call it for errors or for normal requests. Do not include personal data, credentials or customer records. Stored with the product name and the client type (for example Claude or Cursor), without the user's account. At most 5 requests per day. Does not count against the meter.
Upgrade to Pro or Pro+hobok_upgrade
Get a paid plan for Hobok (the free tier caps monthly usage). Pro: 10,000 tool calls a month, for normal use — plan "monthly" ($9/month) or "yearly" ($90/year, 2 months free). Pro+: 100,000 tool calls a month, for automations and heavy use — plan "plus" ($39/month) or "plus_yearly" ($390/year). Without a plan it returns both Pro and Pro+, each with a payment link, for the user to choose; with a plan, one link. An existing Pro subscription changes to Pro+ in place (needs confirm: true; the price difference for the rest of the period is charged at once). Cancel any time: the plan then runs to the end of the paid period, so it also suits a one-time job. A link opens Stripe Checkout in the browser; after payment the account upgrades automatically. Does not count against the meter.
Cancel the Pro subscriptionhobok_cancel_subscription
Cancel the caller's Hobok Pro subscription at the end of the paid period (no refund for the current period; Pro continues until then, then the free tier applies). Requires confirm: true. Run hobok_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with Hobok in Claude or ChatGPT?

Find open invoices and their totals. Issue an invoice to a saved customer. Record a payment on a sent invoice. Keep saved customers and products up to date. See what you can do for the details.

Is this an official Hobok product?

No. usefulapi is an independent service. It is not affiliated with or endorsed by Hobok. The server calls the Hobok API with your own Hobok access, so it sees only the data that your account can see.

Can I connect Hobok to Claude or ChatGPT?

Yes. In Claude, add this server's URL as a custom connector. In ChatGPT, add it as a custom MCP server in Plugins. Then log in once. Cursor, VS Code, Claude Code and Codex work too. See the setup steps.

What do I need to connect?

The login page asks for your Hobok API key. See Before you connect for where to find it.

Do I put my Hobok key or an Authorization header in the client config?

No. 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: the login page asks for your Hobok API key. If the config has such a header, remove it: some clients then send that header instead of the login token, and every call fails with 401.

How do you keep my Hobok credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the Hobok API for you and to derive a private account id for usage metering. usefulapi does not show them on any page or in any reply. To stop all access, remove the connector and change or delete these credentials in Hobok.

Can the AI change my Hobok data?

Yes, if you approve it. 5 of the 11 Hobok tools can create or change data. The other 6 are marked read-only. Most MCP clients ask you to approve a tool call before it runs.

What does it cost?

The Free plan gives 50 tool calls / month. Pro costs $9/mo or $90/yr, with 10,000 tool calls / month. Pro+ costs $39/mo or $390/yr, with 100,000 tool calls / month. Each subscription covers this Hobok server only. Cancel any time: your paid plan then runs to the end of the paid period. Run hobok_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run hobok_upgrade and choose Pro or Pro+, billed monthly or yearly: it returns a Stripe Checkout link. If you already have Pro, ask to change it to Pro+. After you confirm, your existing subscription changes in place, keeps its billing interval and charges the price difference for the rest of the period immediately. To cancel, run hobok_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a Hobok tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with hobok_request_feature. We store the text with the server name, the type of AI client and the tool you tried, not with your account, and read every request when we plan new tools. You can send up to 5 requests per day.

Which AI clients can I use?

Any client that supports remote MCP servers (Streamable HTTP) with OAuth login: Claude (web and desktop), Claude Code, ChatGPT, Codex, Cursor, VS Code, Windsurf and others.

This is a Model Context Protocol endpoint — meant to be connected from an AI client, not opened in a browser. An invalid_token response at the URL is the auth gate working as designed; clients authenticate automatically.

Need a tool this server does not have, or a connection to another system? We build custom integrations and MCP servers.

More Payments & Billing MCP servers

All Payments & Billing servers →