everbill MCP server

Read and create bills, customers and articles, and send bills by email in everbill. Hosted by usefulapi: connect it to Claude, ChatGPT, Cursor or any MCP client.

Connect everbill50 free tool calls a month

What can I ask?

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

Create a bill for the completed job for customer Example GmbH and send it by email.
Show me the latest bills and tell me which ones are still open.
Find the customer with the email address anna@example.com.
Add a new article 'Monthly support' with a net price of 49 EUR and 20 percent VAT.

What you can do with everbill in Claude and ChatGPT

For small businesses that send bills and invoices to customers with everbill.

Create a customer and a bill, then send it by email

Search for the customer, or create one. Create a bill with its line items, then send the bill PDF by email. The email goes to a real customer.

Changes data

Check which bills are still open

List the latest bills with their status. Open a bill to see its customer, line items and payments.

Get the PDF of a bill by its number

Open a bill to read its details. Get its PDF by document number, with the file name and byte length.

Add a product or service to the article list

List the articles to check for an existing product or service. Add a new article with its name, unit and net price.

Changes data

How do I connect everbill?

Before you connect

The login page asks for your everbill API key.

Copy the API key from your everbill account. Your account needs an everbill plan that includes API access. The 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 everbill and this URL, then click Add:
https://everbill.usefulapi.io/mcp
Claude opens the login page: enter your everbill API key.
In a chat, click + → Connectors and turn on everbill.

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 everbill and this URL, choose OAuth as the authentication, confirm the warning and create it:
https://everbill.usefulapi.io/mcp
ChatGPT opens the login page: enter your everbill API key.
In Plugins, install everbill, 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 everbill https://everbill.usefulapi.io/mcp

Cursor

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

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

VS Code

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

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

Codex

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

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

codex mcp login everbill

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://everbill.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 everbill 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 everbill server only. Ask your AI to run everbill_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 everbill_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 everbill_upgrade before then undoes the cancel. Or write to support@usefulapi.io.

Tools 17

Show all 17 tools (the AI picks them for you)

Read only · 9

Check connectioneverbill_check_connection
Check that the everbill API key still works. Exchanges the key for an access token and calls GET /check_token. Returns the vendor's reply.
List billseverbill_list_bills
List the bills (invoices) of the account. Each item has the bill data (status, number, date, customer). The spec documents no filters or pages, so the list can be large; use limit.
Get a billeverbill_get_bill
Get one bill by its id with its customer, address, articles (line items) and transactions (payments).
Get a bill PDFeverbill_get_bill_pdf
Download the PDF of a bill by its document number. Returns { number, filename, byteLength, pdfBase64 }.
List customerseverbill_list_customers
List the customers of the account. The spec documents no filters or pages; use limit.
Get a customereverbill_get_customer
Get one customer by id with its contact person and tags.
Search customerseverbill_search_customers
Find customers whose one field equals a value. `field` is an everbill customer field name (the spec does not list them; test a known value first).
List articleseverbill_list_articles
List the articles (products and services) of the account. The spec documents no filters or pages; use limit.
Get an articleeverbill_get_article
Get one article by id, with its prices, VAT and stock fields.

Changes data · 4

Create a customereverbill_create_customer
Create a customer. Only `name` is required. Creates a new customer record each time it is called (no duplicate check).
Create a billeverbill_create_bill
Create a bill (invoice) with its line items. Default status ZUVS (to send). Each call creates a new bill. For an existing customer, pass customer.id from everbill_list_customers or everbill_get_customer.
Send a bill by emaileverbill_send_bill_email
Send a bill PDF by email to its customer, from sender_mail / sender_name. This sends a real email to a real customer. user_id defaults to the account user id.
Create an articleeverbill_create_article
Create an article (product or service) with its name, unit and net price. Each call creates a new article.

Your usefulapi plan · 4

Usage status (free-tier meter)everbill_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 featureeverbill_request_feature
Tell usefulapi that the user needs something the everbill 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+everbill_upgrade
Get a paid plan for everbill (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: call without confirm first, as the reply states the exact charge for this account (the price difference for the rest of the period, or in a free Pro trial the full Pro+ price, as the trial ends); then call with confirm: true. 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 subscriptioneverbill_cancel_subscription
Cancel the caller's everbill 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 everbill_upgrade later to undo the cancel before the period ends. Does not count against the meter.

FAQ

What can I do with everbill in Claude or ChatGPT?

Create a customer and a bill, then send it by email. Check which bills are still open. Get the PDF of a bill by its number. Add a product or service to the article list. See what you can do for the details.

Is this an official everbill product?

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

Can I connect everbill 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 everbill API key. See Before you connect for where to find it.

Do I put my everbill 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 everbill 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 everbill credentials?

The login stores them encrypted in the authorization grant of your connection. The server uses them to call the everbill 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 everbill.

Can the AI change my everbill data?

Yes, if you approve it. 4 of the 13 everbill tools can create or change data. The other 9 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 everbill server only. Cancel any time: your paid plan then runs to the end of the paid period. Run everbill_usage_status to see how many calls you used.

How do I subscribe or cancel?

Ask the AI to run everbill_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 everbill_cancel_subscription. Your paid plan continues to the end of the paid period.

What if a everbill tool that I need is missing?

Tell the AI what you wanted to do. It can send the request with everbill_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.

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