How do I get Erply API credentials?

You need your **Client Code** (found in your Erply account URL) and a **Session Token**. You can generate a Session Token by making a login request to the Erply API using your credentials. Please refer to the Erply API documentation for details on generating long-lived tokens.

Is the inventory data real-time?

Yes, you can use the list_inventory_stock_levels tool to retrieve current available and reserved counts directly from the Erply database.

Can the agent process new sales in the POS?

This integration currently focuses on listing and auditing products, sales documents, and inventory. Processing live transactions should be performed via the Erply POS interface or dedicated hardware.

Erply ERP & POS MCP Server for Pydantic AI 10 tools — connect in under 2 minutes

Name: Erply ERP & POS
Availability: InStock
Author: Vinkius

ai.pydantic.dev/mcp

Built by Vinkius GDPR 10 Tools SDK

Pydantic AI brings type-safe agent development to Python with first-class MCP support. Connect Erply ERP & POS through the Vinkius and every tool is automatically validated against Pydantic schemas — catch errors at build time, not in production.

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Vinkius supports streamable HTTP and SSE.

python

import asyncio
from pydantic_ai import Agent
from pydantic_ai.mcp import MCPServerHTTP

async def main():
    # Your Vinkius token — get it at cloud.vinkius.com
    server = MCPServerHTTP(url="https://edge.vinkius.com/[YOUR_TOKEN_HERE]/mcp")

    agent = Agent(
        model="openai:gpt-4o",
        mcp_servers=[server],
        system_prompt=(
            "You are an assistant with access to Erply ERP & POS "
            "(10 tools)."
        ),
    )

    result = await agent.run(
        "What tools are available in Erply ERP & POS?"
    )
    print(result.data)

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 Erply ERP & POS MCP Server

Integrate Erply, the powerful enterprise resource planning (ERP) and point-of-sale (POS) platform, directly into your AI workflow. Manage your retail product catalog and pricing, track sales documents and invoices, monitor real-time inventory levels across locations, and oversee your customer database using natural language.

Pydantic AI validates every Erply ERP & POS tool response against typed schemas, catching data inconsistencies at build time. Connect 10 tools through the Vinkius and switch between OpenAI, Anthropic, or Gemini without changing your integration code — full type safety, structured output guarantees, and dependency injection for testable agents.

What you can do

Product Oversight — List and retrieve detailed information, SKUs, and pricing for all your retail products.
Sales Intelligence — Monitor sales documents and invoices, resolving document numbers, total amounts, and payment statuses.
Inventory Management — Access and monitor real-time stock levels, tracking available quantities and reserved counts across your ERP.
Retail Auditing — Retrieve high-level summaries of product volume, sales performance, and organizational inventory health instantly.

The Erply ERP & POS MCP Server exposes 10 tools through the Vinkius. Connect it to Pydantic AI 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 Erply ERP & POS to Pydantic AI via MCP

Follow these steps to integrate the Erply ERP & POS MCP Server with Pydantic AI.

Install Pydantic AI

Run pip install pydantic-ai

Replace the token

Replace [YOUR_TOKEN_HERE] with your Vinkius token

Run the agent

Save to agent.py and run: python agent.py

Explore tools

The agent discovers 10 tools from Erply ERP & POS with type-safe schemas

Why Use Pydantic AI with the Erply ERP & POS MCP Server

Pydantic AI provides unique advantages when paired with Erply ERP & POS through the Model Context Protocol.

Full type safety: every MCP tool response is validated against Pydantic models, catching data inconsistencies before they reach your application

Model-agnostic architecture — switch between OpenAI, Anthropic, or Gemini without changing your Erply ERP & POS integration code

Structured output guarantee: Pydantic AI ensures tool results conform to defined schemas, eliminating runtime type errors

Dependency injection system cleanly separates your Erply ERP & POS connection logic from agent behavior for testable, maintainable code

Erply ERP & POS + Pydantic AI Use Cases

Practical scenarios where Pydantic AI combined with the Erply ERP & POS MCP Server delivers measurable value.

Type-safe data pipelines: query Erply ERP & POS with guaranteed response schemas, feeding validated data into downstream processing

API orchestration: chain multiple Erply ERP & POS tool calls with Pydantic validation at each step to ensure data integrity end-to-end

Production monitoring: build validated alert agents that query Erply ERP & POS and output structured, schema-compliant notifications

Testing and QA: use Pydantic AI's dependency injection to mock Erply ERP & POS responses and write comprehensive agent tests

Erply ERP & POS MCP Tools for Pydantic AI (10)

These 10 tools become available when you connect Erply ERP & POS to Pydantic AI via MCP:

get_erply_user_metadata

Retrieve metadata and settings for the current Erply user

get_product_detailed_data

Get detailed settings and information for a specific product

list_crm_customers

List all customers registered in your ERP

list_inventory_stock_levels

List real-time inventory levels across all products

list_latest_sales_transactions

Identify the most recently recorded sales documents

list_retail_price_lists

List all active price lists and promotion schemes

list_retail_products

List all products in your Erply retail account

list_sales_documents

List all sales invoices and documents

quick_retail_performance_audit

Retrieve a high-level summary of products, sales, and stock

search_products_by_name

Search for products using a name keyword

Example Prompts for Erply ERP & POS in Pydantic AI

Ready-to-use prompts you can give your Pydantic AI agent to start working with Erply ERP & POS immediately.

"List all products with zero stock."

"Show me the last 5 sales invoices."

"Search for product 'Wireless Mouse'."

Troubleshooting Erply ERP & POS MCP Server with Pydantic AI

Common issues when connecting Erply ERP & POS to Pydantic AI through the Vinkius, and how to resolve them.

MCPServerHTTP not found

Update: pip install --upgrade pydantic-ai

Erply ERP & POS + Pydantic AI FAQ

Common questions about integrating Erply ERP & POS MCP Server with Pydantic AI.

How does Pydantic AI discover MCP tools?

Create an MCPServerHTTP instance with the server URL. Pydantic AI connects, discovers all tools, and generates typed Python interfaces automatically.

Does Pydantic AI validate MCP tool responses?

Yes. When you define result types as Pydantic models, every tool response is validated against the schema. Invalid data raises a clear error instead of silently corrupting your pipeline.

Can I switch LLM providers without changing MCP code?

Absolutely. Pydantic AI abstracts the model layer — your Erply ERP & POS MCP integration works identically with OpenAI, Anthropic, Google, or any supported provider.