Acumatica MCP Server

mcp-name: io.github.nicholsonpeter/acumatica

An MCP server that connects AI assistants to Acumatica ERP via the Contract-Based REST API. 28 tools covering queries, mutations, Generic Inquiries, inventory, shipments, reports, attachments, and audit history.

Quick Start

git clone https://github.com/nicholsonpeter/acumatica-mcp.git
cd acumatica-mcp/servers
python setup.py       # interactive credential setup

Then add to your MCP client configuration (e.g. Claude Desktop):

{
  "mcpServers": {
    "acumatica": {
      "command": "uv",
      "args": ["run", "--directory", "/path/to/acumatica-mcp/servers", "python", "server.py"]
    }
  }
}

Using the Client Library Independently

The API client (acumatica_client.py) has no MCP dependency and can be imported directly:

from acumatica_client import AcumaticaClient

client = AcumaticaClient()  # reads config from .env or environment variables
resp = client.get("/entity/Default/24.200.001/SalesOrder", {"$top": "10"})
orders = resp.json()

Features

• Two-layer architecture — standalone API client + thin MCP tool layer
• 25 MCP tools — discovery, queries, mutations, files, inventory, shipments, reports
• Generic Inquiry support — OData and Contract-Based API paths
• OAuth 2.0 with PKCE or username/password authentication
• Automatic retry with exponential backoff on 429/503
• Response compaction — strips Acumatica's verbose envelopes, cuts token cost ~3x
• Tenant discovery — probes capabilities once, caches 24 hours
• Input validation — endpoint name guards, string length caps, format allowlists

Documentation

Full documentation is in the GitHub repository:

• Setup Guide
• End User Guide
• Tool Reference
• Architecture
• Authentication

Licence

MIT