What is mcp4acumatica CLAUDE.md?

Project memory and development instructions for MCP4Acumatica, a Cloudflare Workers service that lets Claude connect to Acumatica ERP through its REST API after user authentication.

Working on the MCP server, its Acumatica connection and OAuth flow, storage abstraction, deployment domains, and repository conventions.

It gives the agent the project's architecture, access model, deployment details, and required source-file rules.

How JeffTiger96/mcp4acumatica configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to JeffTiger96/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/JeffTiger96/mcp4acumatica/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/JeffTiger96/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/jefftiger96/mcp4acumatica/claude-md/github.svg)](https://agentmods.dev/instructions/jefftiger96/mcp4acumatica/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/jefftiger96/mcp4acumatica/claude-md"><img src="https://agentmods.dev/badge/instructions/jefftiger96/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/jefftiger96/mcp4acumatica/claude-md"><img src="https://agentmods.dev/badge/instructions/jefftiger96/mcp4acumatica/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 15,857 This file is loaded in full into every session.

When invoked 15,857 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 100% 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	$0.15857	$0.15857
Opus 5.5	$0.06343	$0.06343
Sonnet 5.5	$0.03171	$0.03171
Haiku 4.5	$0.01586	$0.01586

Measured 2mo ago against content hash 75f5b3e5442e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, 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 2mo 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

100% identical to mcp4acumatica CLAUDE.md — 0 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 · 484 lines

How it starts

The opening of the file, as written. The whole thing — 484 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: 25R2-0.40.0
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        │
│       ├─ 49 tools (38 read-only  │
│       │   + 6 utility/discovery  │
│       │   + 4 schema-knowledge   │
│       │   + 1 write)             │
└──────────────┬──────────────────┘
               │  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 · 484 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.

2mo ago First seen · 484 lines · 15,857 tokens per session scan C 75f5b3e5442e

Subscribe to this mod's changes

mcp4acumatica CLAUDE.md is an instructions file published in the GitHub repository JeffTiger96/mcp4acumatica (0 stars, last pushed 3mo ago), licensed Apache-2.0. It adds 15,857 tokens to every session, about $0.0634 per session on Opus 5.5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). It is 100% identical to mcp4acumatica CLAUDE.md, differing in 0 lines, and is treated as a copy.

Memory and context

mcp4acumatica CLAUDE.md next to 6 instructions from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
mcp4acumatica CLAUDE.mdJeffTiger96/mcp4acumatica	Instructions file	0	3mo ago	Apache-2.0	C	15,857	Claude Code
vscode buildNext.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	9,719	GitHub Copilot
next.js AGENTS.mdvercel/next.js	Instructions file	143k	yesterday	MIT	A	7,461	Codex, OpenCode
langchain AGENTS.mdlangchain-ai/langchain	Instructions file	149k	yesterday	MIT	A	4,680	Codex, OpenCode
vscode oss-third-party-notices.instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	5,516	GitHub Copilot
vscode copilot-instructions.mdmicrosoft/vscode	Instructions file	195k	yesterday	MIT	A	3,093	GitHub Copilot
deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness	Instructions file	274k	2d ago	MIT	A	4,313	Codex, OpenCode

mcp4acumatica: Instructions file for Claude Code