What is mcp4acumatica CLAUDE.md?

Project instructions for a remote server that lets Claude connect to Acumatica, an enterprise resource planning system, through its web API. They describe the project structure, storage approach, authentication flow and required source-file licensing details.

Use them when developing, reviewing or maintaining the mcp4acumatica Cloudflare Worker, especially its Acumatica connection, OAuth sign-in, storage portability and TypeScript files.

They give the coding agent project-specific context and constraints, reducing guesswork when changing the server. They also document how user access is controlled by Acumatica roles.

How cchesebro-prog/mcp4acumatica configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to cchesebro-prog/mcp4acumatica. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/cchesebro-prog/mcp4acumatica/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/cchesebro-prog/mcp4acumatica

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/cchesebro-prog/mcp4acumatica/claude-md/github.svg)](https://agentmods.dev/instructions/cchesebro-prog/mcp4acumatica/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/cchesebro-prog/mcp4acumatica/claude-md"><img src="https://agentmods.dev/badge/instructions/cchesebro-prog/mcp4acumatica/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/cchesebro-prog/mcp4acumatica/claude-md"><img src="https://agentmods.dev/badge/instructions/cchesebro-prog/mcp4acumatica/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 15,451 This file is loaded in full into every session.

When invoked 15,451 The same file — it is already loaded in full.

Security scan C 2 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin 95% copy Near-identical to another mod in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.15451	$0.15451
Opus 5	$0.07725	$0.07725
Sonnet 5	$0.03090	$0.03090
Haiku 4.5	$0.01545	$0.01545

Measured 8d ago against content hash 71c77fdd30dc, method: parsed. Prices are Anthropic first-party input rates as of 2026-09-08, from the pricing page.

Security

Grade C, and why

mcp4acumatica CLAUDE.md scanned grade C with 2 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 8d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

15. **One-line installer.** `install.sh` at the repo root is served by the worker at `/install.sh` (imported as a text module via the `**/*.sh` rule in `wrangler.jsonc`). Users run `curl -fsSL https://<worker>/install.sh

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

15. **One-line installer.** `install.sh` at the repo root is served by the worker at `/install.sh` (imported as a text module via the `**/*.sh` rule in `wrangler.jsonc`). Users run `curl -fsSL https://<worker>/install.sh

Origin

This is a copy

95% identical to mcp4acumatica CLAUDE.md — 47 lines differ, which has more behind it and is treated as the original. This page carries a canonical link to it rather than competing with it.

CLAUDE.md · 479 lines

How it starts

The opening of the file, as written. The whole thing — 479 lines — stays where its author put it; the contents beside it link to each section on GitHub.

CLAUDE.md — Project Memory for MCP4Acumatica

Project Overview

Remote MCP (Model Context Protocol) server on Cloudflare Workers that connects Claude to an Acumatica ERP 2025 R2 instance via the contract-based REST API. Each user authenticates directly with Acumatica — their Acumatica role controls what records they can access.

Copyright header required on all .ts source files: // Copyright 2026 Hall Boys, Inc. + // SPDX-License-Identifier: Apache-2.0
Git config (this repo only): user.email = [email protected]
Current tag: 25R2-0.38.5
Deployed at: https://mcp4acumatica.hallboys.com (primary custom domain) / https://acumatica-mcp.hallboys.com (legacy alias, kept active during migration) / https://mcp4acumatica.<account>.workers.dev (workers.dev fallback)
GitHub: https://github.com/hallboys/MCP4Acumatica

Architecture

Claude (claude.ai / Desktop / API)
    │
    ▼  MCP over streamable-http
┌─────────────────────────────────┐
│  Cloudflare Worker              │
│  OAuthProvider wrapper          │
│    ├─ /authorize → Acumatica    │
│    ├─ /callback  ← Acumatica   │
│    ├─ /token, /register (DCR+CIMD) │
│    ├─ /docs → Documentation site │
│    └─ /mcp → McpAgent DO        │
│       ├─ 48 tools (38 read-only  │
│       │   + 6 utility/discovery  │
│       │   + 4 schema-knowledge)  │
└──────────────┬──────────────────┘
               │  Bearer token (per-user)
               ▼
        Acumatica 25R2 SaaS
        Contract-Based REST API
        Default/25.200.001

Storage Abstraction (Platform Portability)

Tool handlers, the Acumatica HTTP client, config, and caching are decoupled from Cloudflare via two abstractions:

IKeyValueStore (src/lib/kv-store.ts) — Platform-agnostic interface for key-value storage (get, put, delete, list). Cloudflare Workers uses CloudflareKVStore which wraps KVNamespace.
AppEnv (src/types/acumatica.ts) — Portable environment type containing Acumatica connection settings and a store: IKeyValueStore. All tool handlers and shared libraries use AppEnv. The Cloudflare-specific Env extends AppEnv with CF bindings (TOKEN_STORE, OAUTH_KV, MCP_OBJECT, etc.).

Read the full file on GitHub · 479 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

8d ago First seen · 479 lines · 15,451 tokens per session scan C 71c77fdd30dc

Subscribe to this mod's changes

mcp4acumatica CLAUDE.md is an instructions file published in the GitHub repository cchesebro-prog/mcp4acumatica (0 stars, last pushed 2mo ago), licensed Apache-2.0. It adds 15,451 tokens to every session, about $0.0773 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). It is 95% identical to mcp4acumatica CLAUDE.md, differing in 47 lines, and is treated as a copy.

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mcp4acumatica: Instructions file for Claude Code