Skip the install. Get this working in under 2 minutes.
Start a free trial on cloud.anythingmcp.com, add the Invoice Ninja in one click, then point your AI client (Claude, ChatGPT, Copilot or Cursor) at the generated MCP endpoint. No Docker, no git clone, zero engineering experience required.
AnythingMCP's plugin in ChatGPT's directory answers questions from your company databases on AnythingMCP Cloud (PostgreSQL, MySQL, SQL Server, Oracle, SAP HANA, SQLite, MongoDB, read-only): open the listing (opens in a new tab) and click Install plugin. Every other connector is added to ChatGPT as a custom MCP server with your AnythingMCP MCP URL.
Summary
Invoice Ninja: clients, invoices, quotes, recurring invoices, payments, products, expenses and projects. REST API v5 on Invoice Ninja's hosted service or your own instance, API-token auth.
Try asking
Example prompts for Invoice Ninja
Click any prompt to copy it. Paste into Claude, ChatGPT, Cursor, Gemini, Copilot or OpenClaw to run it against this connector.
Claude is AI and can make mistakes. Please double-check responses.
💡 No install? Use cloud.anythingmcp.com directly. Sign in, click Connectors → Invoice Ninja, paste your credentials, mint an MCP API key — done. No Docker, no
git clone, no local server.
Invoice Ninja + ChatGPT
Invoice Ninja: clients, invoices, quotes, recurring invoices, payments, products, expenses and projects. REST API v5 on Invoice Ninja's hosted service or your own instance, API-token auth.
Prerequisites
See the full setup instructions baked into the connector (visible in the in-app store when you select the connector). The required environment variables for this connector are:
INVOICENINJA_URL, INVOICENINJA_API_TOKEN
Step 1 — Get credentials
Getting a token
- Sign in and open Settings → Account Management → API Tokens (on v5; on a self-hosted instance the same page exists).
- Create a token and put it in
INVOICENINJA_API_TOKEN. - Set
INVOICENINJA_URL. For the hosted service that ishttps://invoicing.co; for a self-hosted instance, your own root. No trailing slash and no/api/v1— the adapter appends it.
The header is X-API-TOKEN.
One token, one company. Invoice Ninja supports several companies per account, and the token is bound to the one it was created in. A second company needs a second token and a second connector.
…(continued in the in-app connector instructions)
Step 2 — Install the adapter
curl -fsSL https://raw.githubusercontent.com/HelpCode-ai/anythingmcp/main/docker-compose.quickstart.yml -o docker-compose.yml
printf 'JWT_SECRET=%s\nENCRYPTION_KEY=%s\n' "$(openssl rand -hex 32)" "$(openssl rand -hex 32)" > .env
docker compose up -d
Step 3 — Add the connector in ChatGPT
Your server URL: in AnythingMCP, open MCP Servers → the server this connector is on, and copy its URL (
https://cloud.anythingmcp.com/mcp/…). Use it wherever this guide showsYOUR_SERVER_ID.
ChatGPT adds MCP servers as plugins on its Plugins page, on the web and on paid plans. Developer mode is no longer needed. In a Business workspace only admins and owners can add one; in Enterprise and Edu an admin can grant the Create plugins with MCPs permission.
- Go to chatgpt.com/plugins, click Add, then Add custom MCP server.
- Enter a name, e.g. Name:
Invoice Ninja. - Under Connection, enter the Server URL
https://cloud.anythingmcp.com/mcp/YOUR_SERVER_IDand keep Authentication on OAuth. - Select I understand and want to continue, then Create as a plugin. When ChatGPT asks, sign in to AnythingMCP and allow access.
- Install the new plugin from your personal plugins, then type @ in a chat and pick it.
Available tools
| Tool | What it does |
|---|---|
invoice_ninja_list_clients | List clients with their name, contacts, balance, paid-to-date total and currency |
invoice_ninja_get_client | Read one client in full: their contacts, addresses, payment terms, balance and the settings that override the company defaults for them |
invoice_ninja_list_invoices | List invoices with their number, date, due date, client, amount and balance |
invoice_ninja_get_invoice | Read one invoice in full: every line item with quantity, cost and tax, the totals, the balance outstanding and the payments applied |
invoice_ninja_list_quotes | List quotes with their number, date, client, amount and status — what is out with prospects and not yet converted into an invoice |
invoice_ninja_list_payments | List payments with their date, amount, method, client and the invoices they were applied to — the money that actually arrived |
invoice_ninja_list_recurring_invoices | List recurring invoices with their frequency, next send date, client and amount — the predictable part of the revenue |
invoice_ninja_list_products | List products with their key, notes, cost, price, quantity and tax settings |
invoice_ninja_list_expenses | List expenses with their date, vendor, category, amount and whether they have been billed to a client — the cost side of the ledger |
invoice_ninja_list_projects | List projects with their name, client, budgeted hours, task rate and due date — the anchor for time and profitability questions |
FAQ
Does the free ChatGPT plan work with custom MCP servers? OpenAI documents custom MCP servers for paid plans only; the Free plan is not on its list.
Next steps
- Connector landing page
- Connect to Claude
- Connect to Cursor
- Connect to Gemini
- Connect to Meta Muse
- Connect to Microsoft Copilot
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