How to Use the Invoicing Plus MCP in OpenAI Agents SDK

Q: Can my agents use Invoicing Plus to reconcile payments?

Yes, your agents can run listpayments to check incoming transactions. They can compare these records against open invoices retrieved via listinvoices to flag outstanding balances. This allows for automated, hands-off reconciliation.

Q: What happens if an agent tries to pull a non-existent invoice?

The getinvoice tool returns a clean error payload if the ID is invalid. Your agent reads this error directly and can ask the user for the correct ID or try searching with listinvoices.

Run multi-agent billing workflows with OpenAI Agents SDK to draft estimates and track customer payments on autopilot.

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Connect Invoicing Plus MCP to OpenAI Agents SDK

Create your Vinkius account to connect Invoicing Plus to OpenAI Agents SDK and route execution through our secure gateway. The platform manages server hosting, runtime updates, and security layers. Configuration requires no manual server provisioning.

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Setup Invoicing Plus with OpenAI Agents SDK

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Automate billing runs with this MCP Server

The `list_invoices` tool gives your OpenAI agents direct access to your billing history. When a billing cycle ends, your agent polls unpaid records, checks them against your database, and prepares follow-ups without manual intervention. This Invoicing Plus MCP Server connects directly to your Vinkius-hosted endpoint to feed your OpenAI agent stream. Because the connection is managed, your python agent pulls records safely, handles high-volume checks, and logs every query in your OpenAI dashboard.

Multi-agent customer profiling

The `create_customer` tool lets your OpenAI agent provision new client profiles during conversational onboarding. Your agent takes raw chat text, extracts the billing details, and writes the record directly to your Invoicing Plus account. By using specialized OpenAI agent handoffs, a sales agent can gather information and pass execution to a billing agent. That second agent runs `get_customer` to verify the record was created correctly, keeping your client database clean.

Safe estimate generation via guardrails

The `get_estimate` tool lets your OpenAI agent pull active quotes to verify pricing before sending them to prospects. Your agent matches user queries against existing estimates to ensure no duplicate offers go out. Built-in OpenAI agent guardrails validate these actions before they execute. If an agent tries to modify an Invoicing Plus quote, the system halts the step, keeping your pricing structure locked down and accurate.

Setup guide

Set up Invoicing Plus MCP in OpenAI Agents SDK

Prerequisites

Python 3.10+ installed
openai-agents package (pip install openai-agents)
Active Vinkius subscription with a valid endpoint token

1

Install the SDK

Run pip install openai-agents to install the OpenAI Agents SDK. The MCP integration is built-in — no extra dependencies needed.
2

Connect via SSE transport

Use MCPServerSse with your Vinkius endpoint URL. Replace [YOUR_TOKEN_HERE] with your token from cloud.vinkius.com. The SDK auto-discovers all Invoicing Plus tools at runtime.
3

Create your Agent

Pass the MCP to Agent(mcp_servers=[server]). The agent receives Invoicing Plus tools as native definitions — JSON schemas resolve automatically.
4

Run the agent

Call Runner.run(agent, prompt) to execute. The agent invokes the appropriate Invoicing Plus tools and returns structured results. Copy the full example on the right to get started.

agent.py

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

async def main():
    async with MCPServerSse(
        url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp"
    ) as server:
        agent = Agent(
            name="Invoicing Plus Agent",
            instructions="You have access to Invoicing Plus tools.",
            mcp_servers=[server],
        )
        result = await Runner.run(agent, "List recent transactions")
        print(result.final_output)

asyncio.run(main())

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Independent Platform Disclaimer: Vinkius is an independent platform and is not affiliated with, endorsed by, sponsored by, verified by, or otherwise authorized by Invoicing Plus. 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.

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Common questions about Invoicing Plus MCP in OpenAI Agents SDK

You install the SDK and initialize the HTTP server stream. Pass the Vinkius endpoint URL directly into your `MCPServerStreamableHttpParams` configuration. Your OpenAI agents will automatically discover all 12 tools at startup.

Yes, your agents can run `list_payments` to check incoming transactions. They can compare these records against open invoices retrieved via `list_invoices` to flag outstanding balances. This allows for automated, hands-off reconciliation.

The SDK reads the tool schema directly from the hosted Vinkius endpoint when the agent boots up. You do not need to manually define Python schemas for `get_company` or `list_items`. Set `cacheToolsList=True` to make this lookup fast.

The `get_invoice` tool returns a clean error payload if the ID is invalid. Your agent reads this error directly and can ask the user for the correct ID or try searching with `list_invoices`.

All transaction lists and customer emails stay inside Vinkius's zero-trust V8 sandbox. Your OpenAI Agents SDK only sees data through encrypted HTTPS tunnels. We never store your raw billing credentials on local disks.

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