Borrowing it
Nothing to install: this file belongs to optimize-overseas/lob-mcp. 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/optimize-overseas/lob-mcp/main/CLAUDE.mdgit clone --depth 1 https://github.com/optimize-overseas/lob-mcpWrote 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/optimize-overseas/lob-mcp/claude-md)<a href="https://agentmods.dev/instructions/optimize-overseas/lob-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/optimize-overseas/lob-mcp/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/optimize-overseas/lob-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/optimize-overseas/lob-mcp/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 | $0.05367 | $0.05367 |
| Opus 5.5 | $0.02147 | $0.02147 |
| Sonnet 5.5 | $0.01073 | $0.01073 |
| Haiku 4.5 | $0.00537 | $0.00537 |
Grade A, and why
lob-mcp CLAUDE.md scanned grade A with 0 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 1mo 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.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 188 lines — stays where its author put it; the contents beside it link to each section on GitHub.
CLAUDE.md
This file provides guidance to Claude Code (claude.ai/code) when working with code in this repository.
Project
lob-mcp is an MCP (Model Context Protocol) server that wraps the Lob.com API, exposing 78 tools + 23 design-spec resources across 12 resource groups — address verification, address book CRUD, mail-piece preview/create/lifecycle (postcards, letters, self-mailers, checks), templates + template versions + template search, campaigns + creatives, buckslips/cards + print orders, QR-code analytics, resource proofs, bank accounts, webhook subscriptions, and design specifications.
Distributed on npm as lob-mcp; runs as a local stdio server via npx lob-mcp. The package and repo are public.
Public-repository discipline
This rule is permanent and non-negotiable. This repository, the npm package, the GitHub release page, and the git history are all public. The codebase must be completely generic and applicable to any Lob user — exposing nothing about who maintains or uses it, what use cases it gets pointed at, or what specific Lob resources live in any private account.
Scope — applies to every public surface, not just code:
- Source files (
src/), build output (build/), schemas, tool descriptions, error messages, log lines, banner text. - Docs:
README.md,CHANGELOG.md,CLAUDE.md, anything underdocs/. - Tests that ship in the repo (currently
tests/is gitignored, but if any test ever becomes tracked it falls under this rule). - Examples in any of the above.
- Git metadata: commit messages, tag messages, GitHub release notes, PR descriptions, issue titles/bodies. These are public artifacts of the repo.
- npm metadata:
package.jsondescription/keywords/author, the published tarball.
Forbidden content:
- Business or customer names (real or thinly anonymized).
- Specific use-case framing (industries, workflows, campaigns, vertical references).
- Real Lob resource identifiers from any private account:
tmpl_…,adr_…,bnk_…,cmp_…,crv_…,psc_…,ltr_…,chk_…,bck_…,crd_…,vrf_…,ep_…,whk_…, etc. Even in a "the live verification used X" sentence in a commit message. Use generic placeholders instead. - Real template descriptions / campaign names / metadata values from any private account, even if they sound innocuous.
- Account-specific quantities, prices, or volumes that imply who the account belongs to.
- Personal identifiers: maintainer email beyond the
package.jsonauthor block, anyone's name, addresses other than Lob's HQ at 210 King St used as an explicit placeholder. - Secrets: any API key, credential, internal URL, or live Lob test data.
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.
- 1mo ago Changed · +71 tokens per session e63e3a03b92c
- 1mo ago Changed · +8 tokens per session c3e125f38b76
- 2mo ago First seen · 188 lines · 5,288 tokens per session scan A 753fe45e5cb1
lob-mcp CLAUDE.md is an instructions file published in the GitHub repository optimize-overseas/lob-mcp (1 stars, last pushed yesterday), licensed MIT. It adds 5,367 tokens to every session, about $0.0215 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.
lob-mcp CLAUDE.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| lob-mcp CLAUDE.mdoptimize-overseas/lob-mcp | Instructions file | 1 | yesterday | MIT | A | 5,367 | 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 |