How do I find my Holded API Key?

Log in to your Holded account, click on the **Settings** icon (top right), go to **Developers**, and you will find your unique **API Key** listed there. You can create multiple keys for different integrations.

What document types are supported in the invoicing tools?

This integration currently focuses on the `invoice` document type. For other types like sales orders or purchase orders, you can use the generic `list_invoices` logic if they are mapped under the same module in your instance.

Can I update stock levels through this integration?

Yes! Use the `update_product_stock` tool. You must provide the product ID and a JSON string containing the warehouse ID and the new quantity to update your inventory.

Is the integration secure for ERP data?

Absolutely. The integration uses official Holded API keys in the request header over HTTPS. Your credentials and business data are encrypted and stored securely within the Vinkius Cloud infrastructure.

Holded MCP Server for OpenAI Agents SDK 11 tools — connect in under 2 minutes

Name: Holded
Availability: InStock
Author: Vinkius

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

Built by Vinkius GDPR 11 Tools SDK

The OpenAI Agents SDK enables production-grade agent workflows in Python. Connect Holded 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="Holded Assistant",
            instructions=(
                "You help users interact with Holded. "
                "You have access to 11 tools."
            ),
            mcp_servers=[mcp_server],
        )

        result = await Runner.run(
            agent, "List all available tools from Holded"
        )
        print(result.final_output)

asyncio.run(main())

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Stream every event to Splunk, Datadog, or your own webhook in real-time

* 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 Holded MCP Server

Connect your Holded ERP platform to any AI agent and take full control of your invoicing, CRM, and project management through natural conversation.

The OpenAI Agents SDK auto-discovers all 11 tools from Holded through native MCP integration. Build agents with built-in guardrails, tracing, and handoff patterns. chain multiple agents where one queries Holded, another analyzes results, and a third generates reports, all orchestrated through Vinkius.

What you can do

Invoicing Oversight — List all documents, retrieve detailed invoice data, and monitor payment statuses efficiently.
CRM & Contact Management — Access lists of clients, suppliers, and leads, and retrieve full profile information for better relationship management.
Project & Task Tracking — List active projects and monitor tasks across your entire portfolio to ensure deadlines are met.
Inventory & Products — Access your product catalog and update stock levels directly from the chat interface.
Business Intelligence — Retrieve account and organization metadata to maintain a high-level overview of your business operations.
Unified ERP — Bridge the gap between your accounting and operations using the comprehensive Holded API.

The Holded MCP Server exposes 11 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 Holded to OpenAI Agents SDK via MCP

Follow these steps to integrate the Holded 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 11 tools from Holded

Why Use OpenAI Agents SDK with the Holded MCP Server

OpenAI Agents SDK provides unique advantages when paired with Holded 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

Holded + OpenAI Agents SDK Use Cases

Practical scenarios where OpenAI Agents SDK combined with the Holded MCP Server delivers measurable value.

Automated workflows: build agents that query Holded, process the data, and trigger follow-up actions autonomously

Multi-agent orchestration: create specialist agents. one queries Holded, another analyzes results, a third generates reports

Data enrichment pipelines: stream data through Holded tools and transform it with OpenAI models in a single async loop

Customer support bots: agents query Holded to resolve tickets, look up records, and update statuses without human intervention

Holded MCP Tools for OpenAI Agents SDK (11)

These 11 tools become available when you connect Holded to OpenAI Agents SDK via MCP:

get_api_profile

Retrieve information about the authenticated account

get_contact_details

Get detailed profile information for a specific contact

get_invoice_details

Get detailed information about a specific invoice

get_product_details

Get detailed information for a specific product

get_project_details

Get detailed configuration and status for a project

list_all_tasks

List tasks across all projects

list_contacts

Useful for finding the contact ID required for documents. List all contacts (clients, suppliers, leads) in Holded

list_invoices

Use this to monitor billing and find IDs for specific document actions. List all invoices in your Holded account

list_products

List all products and services in your Holded inventory

list_projects

List all active and past projects

update_product_stock

Pass details as a JSON string in "body_json" (requires warehouseId and new quantity). Update the stock level for a specific product

Example Prompts for Holded in OpenAI Agents SDK

Ready-to-use prompts you can give your OpenAI Agents SDK agent to start working with Holded immediately.

"List all active projects and show the last task for each."

"Find contact 'Acme Corp' and show their recent invoices."

"Show me the details for product ID 'prod_992' and its stock level."

Troubleshooting Holded MCP Server with OpenAI Agents SDK

Common issues when connecting Holded 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.

Holded + OpenAI Agents SDK FAQ

Common questions about integrating Holded 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.