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.

Invoice Ninja (Invoicing & Billing) MCP Server for OpenAI Agents SDK 10 tools — connect in under 2 minutes

Name: Invoice Ninja (Invoicing & Billing)
Availability: InStock
Author: Vinkius

openai.github.io/openai-agents-python/mcp

Built by Vinkius GDPR 10 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect Invoice Ninja (Invoicing & Billing) through Vinkius and your agents gain typed, auto-discovered tools with built-in guardrails. no manual schema definitions required.

Get MCP Server for AI Agents

ASK AI ABOUT THIS MCP SERVER

Open in ChatGPT Open in Claude Open in Perplexity

Vinkius supports streamable HTTP and SSE.

python

import asyncio
from agents import Agent, Runner
from agents.mcp import MCPServerStreamableHttp

async def main():
    # Your Vinkius token. get it at cloud.vinkius.com
    async with MCPServerStreamableHttp(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as mcp_server:

        agent = Agent(
            name="Invoice Ninja (Invoicing & Billing) Assistant",
            instructions=(
                "You help users interact with Invoice Ninja (Invoicing & Billing). "
                "You have access to 10 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from Invoice Ninja (Invoicing & Billing)"
        )
        print(result.final_output)

asyncio.run(main())

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* Every MCP server runs on Vinkius-managed infrastructure inside AWS - a purpose-built runtime with per-request V8 isolates, Ed25519 signed audit chains, and sub-40ms cold starts optimized for native MCP execution. See our infrastructure

About Invoice Ninja (Invoicing & Billing) MCP Server

Connect your Invoice Ninja account to any AI agent and take full control of your small business billing and client management through natural conversation.

The OpenAI Agents SDK auto-discovers all 10 tools from Invoice Ninja (Invoicing & Billing) through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries Invoice Ninja (Invoicing & Billing), another analyzes results, and a third generates reports, all orchestrated through Vinkius.

What you can do

Client Management — List all registered clients and retrieve detailed CRM data including balances, VAT identifiers, and contact histories directly from your agent
Invoice Lifecycle — Create new invoice drafts, update line items, and manage the transition from 'Draft' to 'Sent' and 'Paid' stages securely
Balance Audit — Fetch full tax math and raw total calculations for specific invoices to verify billing accuracy and financial reporting
CRM Operations — Programmatically create and update client profiles with custom JSON payloads to maintain an accurate business registry
Document Cleanup — Irreversibly delete or archive invoices and client records to maintain clean accounting totals and optimized workspace data
Billing Workflow — Browse through your entire billing system to monitor revenue streams and track outstanding payments in real-time

The Invoice Ninja (Invoicing & Billing) MCP Server exposes 10 tools through the Vinkius. Connect it to OpenAI Agents SDK in under two minutes — no API keys to rotate, no infrastructure to provision, no vendor lock-in. Your configuration, your data, your control.

How to Connect Invoice Ninja (Invoicing & Billing) to OpenAI Agents SDK via MCP

Follow these steps to integrate the Invoice Ninja (Invoicing & Billing) MCP Server with OpenAI Agents SDK.

Install the SDK

Run pip install openai-agents in your Python environment

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token from cloud.vinkius.com

Run the script

Save the code above and run it: python agent.py

Explore tools

The agent will automatically discover 10 tools from Invoice Ninja (Invoicing & Billing)

Why Use OpenAI Agents SDK with the Invoice Ninja (Invoicing & Billing) MCP Server

OpenAI Agents SDK provides unique advantages when paired with Invoice Ninja (Invoicing & Billing) through the Model Context Protocol.

Native MCP integration via `MCPServerSse`, pass the URL and the SDK auto-discovers all tools with full type safety

Built-in guardrails, tracing, and handoff patterns let you build production-grade agents without reinventing safety infrastructure

Lightweight and composable: chain multiple agents and MCP servers in a single pipeline with minimal boilerplate

First-party OpenAI support ensures optimal compatibility with GPT models for tool calling and structured output

Invoice Ninja (Invoicing & Billing) + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the Invoice Ninja (Invoicing & Billing) MCP Server delivers measurable value.

Automated workflows: build agents that query Invoice Ninja (Invoicing & Billing), process the data, and trigger follow-up actions autonomously

Multi-agent orchestration: create specialist agents. one queries Invoice Ninja (Invoicing & Billing), another analyzes results, a third generates reports

Data enrichment pipelines: stream data through Invoice Ninja (Invoicing & Billing) tools and transform it with OpenAI models in a single async loop

Customer support bots: agents query Invoice Ninja (Invoicing & Billing) to resolve tickets, look up records, and update statuses without human intervention

Invoice Ninja (Invoicing & Billing) MCP Tools for OpenAI Agents SDK (10)

These 10 tools become available when you connect Invoice Ninja (Invoicing & Billing) to OpenAI Agents SDK via MCP:

create_client

Create a new client in InvoiceNinja

create_invoice

Create a new invoice for a client

delete_client

Delete a client from InvoiceNinja

delete_invoice

Delete an invoice from InvoiceNinja

get_client

Get complete details of a specific InvoiceNinja client

get_invoice

Get details of a specific invoice

list_clients

List all clients registered in InvoiceNinja

list_invoices

List invoices in InvoiceNinja

update_client

You must provide the fields to update encoded as a JSON string. Update an existing client in InvoiceNinja

update_invoice

g., from draft to sent). Provide modifications as a JSON string. Update an existing invoice

Example Prompts for Invoice Ninja (Invoicing & Billing) in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with Invoice Ninja (Invoicing & Billing) immediately.

"List the last 5 invoices generated this month"

"Show me the details for client 'TechCorp' (ID: client-987)"

"Create a new client: 'Future Labs' with email 'billing@futurelabs.io'"

Troubleshooting Invoice Ninja (Invoicing & Billing) MCP Server with OpenAI Agents SDK

Common issues when connecting Invoice Ninja (Invoicing & Billing) to OpenAI Agents SDK through the Vinkius, and how to resolve them.

MCPServerStreamableHttp not found

Ensure you have the latest version: pip install --upgrade openai-agents

Agent not calling tools

Make sure your prompt explicitly references the task the tools can help with.

Invoice Ninja (Invoicing & Billing) + OpenAI Agents SDK FAQ

Common questions about integrating Invoice Ninja (Invoicing & Billing) MCP Server with OpenAI Agents SDK.

How does the OpenAI Agents SDK connect to MCP?

Use MCPServerSse(url=...) to create a server connection. The SDK auto-discovers all tools and makes them available to your agent with full type information.