Invoice Ninja MCP. Manage client billing and invoices from natural conversation.
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Invoice Ninja (Invoicing & Billing) connects your small business billing to your AI agent. It lets you manage clients, track payments, and handle the full invoice lifecycle—all from natural conversation.
Use it to list clients, get balances, create drafts, or audit tax math without leaving your dev environment.
What your AI agents can do
Create client
Adds a new client record to InvoiceNinja.
Create invoice
Generates a new invoice draft for an existing client.
Delete client
Permanently removes a client record from InvoiceNinja.
Gets a full list of clients or fetches specific client details, including balances and contact info.
Manages the entire client lifecycle, from creating a new profile to deleting old records.
Creates new invoice drafts and updates existing invoices, controlling their status (Draft, Sent, Paid).
Retrieves the raw tax calculations and total math for any specific invoice to validate billing accuracy.
Browses the entire billing system to track which invoices are outstanding and monitor revenue streams.
Ask AI about this MCP
Supported MCP Clients
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019d75bbcreate client
Adds a new client record to InvoiceNinja.
019d75bbcreate invoice
Generates a new invoice draft for an existing client.
019d75bbdelete client
Permanently removes a client record from InvoiceNinja.
019d75bbdelete invoice
Removes an invoice record from InvoiceNinja.
019d75bbget client
Retrieves all details for one specific client.
019d75bbget invoice
Retrieves all details for one specific invoice.
019d75bblist clients
Returns a list of all clients currently registered in InvoiceNinja.
019d75bblist invoices
Returns a list of invoices from InvoiceNinja.
019d75bbupdate client
Modifies fields on an existing client profile using a JSON payload.
019d75bbupdate invoice
Makes changes to an existing invoice, such as changing its status or line items.
Choose How to Get Started
Build a custom MCP for your own tools, or connect a ready-made integration from our catalog.
Build Your Own
Turn any API into an MCP. Import a spec, define Agent Skills, or deploy with MCPFusion.
- Import from OpenAPI, Swagger, or YAML specs
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Make Your AI Do More
Start with Invoice Ninja (Invoicing & Billing), then connect any of our 4,700+ other servers whenever your AI needs more. One click, no limits.
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- Works with Claude, ChatGPT, Cursor, and more
- New servers added to the catalog every week
What you can do with this MCP connector
Invoice Ninja (Invoicing & Billing) hooks up your small business billing directly to your AI agent. You can manage clients, track payments, and handle the whole invoice process using just natural talk. You can list clients, check balances, make drafts, or audit tax math without ever leaving your dev environment.
Listing and Getting Client Recordslist_clients returns a full list of every client you've got in InvoiceNinja. get_client pulls all the specific details for one client, giving you their balance, contact info, and everything else. You can also update a client's profile using update_client with a JSON payload, and if you need to clean house, delete_client permanently removes a client record.
Invoice Creation and Management
You can make new invoice drafts with create_invoice for an existing client. get_invoice fetches all the details for a specific invoice. You can update existing invoices—like changing their status or line items—using update_invoice. To clean up, delete_invoice removes an invoice record.
Auditing and Monitoring Revenuelist_invoices gives you a list of all invoices. You can check which invoices are outstanding by looking through the system. get_invoice lets you audit the raw tax calculations and total math on any specific invoice, so you know the billing is spot on. You can also monitor your outstanding revenue streams using the data available in the system.
How Invoice Ninja MCP Works
- 1 Subscribe to the server and enter your Invoice Ninja Domain and API Token.
- 2 Pass the required client or invoice identifiers to your AI agent.
- 3 The agent invokes the specific tool (e.g.,
get_client) and you receive the requested data payload.
The bottom line is, your AI agent executes the billing action, and you see the results right in your chat window.
Who Is Invoice Ninja MCP For?
Small business owners, freelancers, and operations staff who handle billing need this. If you spend time manually checking client balances, drafting invoices, or auditing tax calculations, this tool saves you time. It lets you manage your whole billing stack—from client setup to payment tracking—without logging into a separate web app.
Creates and updates invoice drafts for clients without leaving their IDE or design tool.
Monitors outstanding invoices and manages client balances using natural conversation during busy workdays.
Audits invoice line items and tax calculations to ensure financial integrity across the entire billing system.
What Changes When You Connect
- See current client balances and contact history instantly. Use
get_clientorlist_clientsto pull a client's full record, including outstanding debts, right from your agent. - Audit tax calculations and total line items. Run
get_invoiceto fetch the raw math behind any invoice, letting you verify billing accuracy without opening the web dashboard. - Keep your client data clean. Use
create_clientandupdate_clientto build out profiles, ordelete_clientwhen a record is obsolete. - Control the invoice status. Use
create_invoiceandupdate_invoiceto move an invoice from 'Draft' to 'Sent' or 'Paid' through a simple command. - Track revenue flow. Running
list_invoiceslets you browse your entire billing system and see which invoices are outstanding in real-time.
Real-World Use Cases
A freelancer needs to send a follow-up invoice.
The freelancer needs to send an invoice for 'Future Labs' but doesn't want to switch apps. They ask their agent to create_invoice using the client's ID. The agent drafts the invoice and sends it back, letting them continue working in their design tool.
The accounting team needs to verify tax math.
An accountant receives an invoice and needs to confirm the tax calculation. They ask the agent to run get_invoice and specifically request the tax math. The agent returns the raw total calculations, confirming the invoice is correct for filing.
The small business owner is onboarding a new client.
The owner needs to add 'Global Corp' and set up their VAT ID. They ask the agent to create_client. The agent runs the tool, and the client record is instantly available for use in subsequent invoice creations.
The operations team needs to archive old data.
The ops specialist needs to remove old, completed client records that are no longer relevant. They use delete_client to remove the record, keeping the active billing system clean and optimized.
The Tradeoffs
Manually updating client records
Logging into the web portal, navigating to the client profile, finding the specific field (like VAT ID), and manually updating it. This takes time and risks human error.
→
Use update_client to pass a JSON payload with the new fields. The agent handles the API call, keeping the process fast and auditable.
Verifying invoice totals via screenshots
Getting a screenshot of an invoice total and trying to manually calculate the tax breakdown. This is slow and useless for actual accounting audits.
→
Use get_invoice to retrieve the raw total calculations and tax math. This gives you the numbers you need for financial reporting.
Creating invoices without checking client status
Drafting an invoice for a client that hasn't been properly set up, leading to incomplete drafts or incorrect balances.
→
Always run get_client or list_clients first. Confirm the client's ID and balance before running create_invoice to guarantee a clean record.
Over-relying on the web UI's 'save' button
Thinking that just clicking 'save' on the web portal is enough to handle complex status changes, like moving from Draft to Paid.
→
Use update_invoice to programmatically change the status. The agent handles the transition, ensuring the status change is recorded correctly.
Skipping record deletion when needed
Keeping inactive client records that bloat the system, making reports slow and confusing.
→
Use delete_client or delete_invoice when a record is confirmed obsolete. This keeps your active accounting totals clean.
When It Fits, When It Doesn't
Use this server if your workflow requires managing client and invoice data in a programmatic way. If you need to list all clients (list_clients), check a specific client's balance (get_client), or move an invoice through its lifecycle (update_invoice), this is your tool. Don't use it if you only need to view a single, static report or if you are managing data outside of Invoice Ninja. If your process involves complex, multi-step actions (e.g., 'Create client, then create invoice, then update client VAT ID'), you'll need to orchestrate these multiple tools through your agent. If you just need to read data without modification, get_client and list_clients are enough. If you need to calculate something complex but don't have the underlying data, this server won't help. It's pure data manipulation and workflow control.
Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Invoice Ninja. All third-party trademarks, logos, and brand names are the property of their respective owners. Their use on this website is strictly for informational purposes to identify service compatibility and interoperability.
VINKIUS INFRASTRUCTURE
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Works with Claude, ChatGPT, Cursor, and more
The Model Context Protocol standardizes how applications expose capabilities to LLMs. Instead of operating in isolation, your AI gains direct access to external platforms, live data, and real-world actions through secure, standardized connections.
This server provides 10 capabilities that interface natively with Claude, ChatGPT, Cursor, and any MCP client. No middleware. No custom integration required.
Available Capabilities
Billing shouldn't require switching between dashboards and spreadsheets.
The old way is a mess of tabs. You're logged into the billing portal, then you open a spreadsheet to check tax rates. You copy the client ID into a second system to update their VAT number. You then go back to the billing portal, navigate to the correct client, and finally manually click 'Draft Invoice.' It's a five-step copy-paste dance that takes forever and guarantees some field gets missed.
Invoice Ninja (Invoicing & Billing) MCP Server: Manage client billing and invoices from natural conversation.
Instead of manually auditing tax lines in the web UI, you ask your agent to `get_invoice`. It runs the tool and pulls the raw tax math and total calculations. You see the numbers, you verify the numbers, and you move on. It's immediate verification, not a manual check.
Common Questions About Invoice Ninja MCP
How do I check a client's balance using the Invoice Ninja MCP Server? +
Use get_client to retrieve the complete details for a specific client. This returns their current balance, outstanding invoices, and contact history.
Can I create an invoice using the Invoice Ninja MCP Server? +
Yes, run create_invoice. You just need the client's ID and the necessary line items. The agent drafts the invoice and returns the ID for follow-up actions.
What if I need to change an invoice's status? +
Use update_invoice. You pass the invoice ID and the new status (e.g., 'Paid' or 'Sent') as a JSON payload. The server updates the record and confirms the change.
How do I list all my clients with the Invoice Ninja MCP Server? +
Run list_clients. This tool pulls a list of every client registered in Invoice Ninja. You can then use the IDs from that list for further actions.
Can I delete an invoice using the Invoice Ninja MCP Server? +
How do I update a client's information using the Invoice Ninja MCP Server? +
You use the update_client tool. This lets your agent modify an existing client record by providing specific fields as a JSON string. You can update things like VAT identifiers or contact details without manually logging into Invoice Ninja.
Can I generate a new client profile using the Invoice Ninja MCP Server? +
Yes, you call the create_client tool. This instantly adds a brand new client to your Invoice Ninja account. You'll need to provide the client's name and email to start the process.
How do I list all my invoices using the Invoice Ninja MCP Server? +
You call the list_invoices tool. This action retrieves a complete list of all invoices in your system. Your agent can then read the status, dates, and total amounts for every invoice.
Can I create a new invoice draft through my agent? +
Yes. Use the create_invoice tool by providing an existing Client ID and a JSON array of line items. Your agent will generate the draft in Invoice Ninja, ready for your final review and sending.
How do I check a client's outstanding balance? +
The get_client tool allows your agent to retrieve complete details for a specific client, including their current balance and payment history. This helps you quickly identify which clients need follow-up on outstanding payments.
Can my agent list all unpaid invoices? +
Absolutely. Use the list_invoices tool to browse your billing system. Your agent can filter through the results to show you which invoices are still in 'Sent' or 'Overdue' status directly through natural conversation.
Use it with your favorite AI tools
Connect this server to Cursor, Claude, VS Code, and more.
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