Borrowing it
Nothing to install: this file belongs to hallboys/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.
curl -O https://raw.githubusercontent.com/hallboys/MCP4Acumatica/main/CLAUDE.mdgit clone --depth 1 https://github.com/hallboys/MCP4AcumaticaWrote 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.
[](https://agentmods.dev/instructions/hallboys/mcp4acumatica/claude-md)<a href="https://agentmods.dev/instructions/hallboys/mcp4acumatica/claude-md"><img src="https://agentmods.dev/badge/instructions/hallboys/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.
<a href="https://agentmods.dev/instructions/hallboys/mcp4acumatica/claude-md"><img src="https://agentmods.dev/badge/instructions/hallboys/mcp4acumatica/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.25309 | $0.25309 |
| Opus 5 | $0.12655 | $0.12655 |
| Sonnet 5 | $0.05062 | $0.05062 |
| Haiku 4.5 | $0.02531 | $0.02531 |
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 6d 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 How it starts
The opening of the file, as written. The whole thing — 633 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.
- License: Apache 2.0 — Copyright 2026 Hall Boys, Inc.
- Copyright header required on all
.tssource files:// Copyright 2026 Hall Boys, Inc.+// SPDX-License-Identifier: Apache-2.0 - Git config (this repo only):
user.email = [email protected] - Current tag:
25R2-0.52.0 - 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 │
│ ├─ 51 tools (38 read-only │
│ │ + 6 utility/discovery │
│ │ + 4 schema-knowledge │
│ │ + 2 documentation │
│ │ + 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 usesCloudflareKVStorewhich wrapsKVNamespace.AppEnv(src/types/acumatica.ts) — Portable environment type containing Acumatica connection settings and astore: IKeyValueStore. All tool handlers and shared libraries useAppEnv. The Cloudflare-specificEnvextendsAppEnvwith CF bindings (TOKEN_STORE,OAUTH_KV,MCP_OBJECT, etc.).
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.
- 6d ago Changed · +20 lines · +1,974 tokens per session c1080b735ff3
- 10d ago First seen · 613 lines · 23,335 tokens per session scan C e7a492555130
MCP4Acumatica CLAUDE.md is an instructions file published in the GitHub repository hallboys/MCP4Acumatica (17 stars, last pushed 7d ago), licensed Apache-2.0. It adds 25,309 tokens to every session, about $0.1265 per session on Opus 5. A static security scan graded it C with 2 findings (downloads and executes remote code, makes network calls). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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