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xtnd-mcp-one: Instructions file for Claude Code

CLAUDE.md

xtnd-mcp-one CLAUDE.md is an instructions file for Claude Code from XTND-DYNAMICS/xtnd-mcp-one. It costs 236 tokens per session, scanned A, original, MIT.

A set of project instructions for Claude Code when working on an MCP server that connects one.com mailboxes to Cloudflare Workers. It defines project rules, commands, secrets handling, and testing steps.

In plain words
What is it for?
Use it when developing, testing, or deploying the xtnd-mcp-one server, especially when working with TypeScript, Cloudflare Workers, or one.com email integration.
Why use it?
It gives the coding agent the project-specific rules it needs, including how to protect mailbox credentials and verify changes before committing.

Instructions file for Claude Code

Written for Claude Code: the file is CLAUDE.md. Also seen: mentions CLAUDE.md.

This is XTND-DYNAMICS/xtnd-mcp-one's own configuration. It tells Claude Code how to work on xtnd-mcp-one itself, so it is not a mod to install elsewhere. Copy it as a starting point and replace the rules that are about this project. Everything xtnd-mcp-one configures →

not rated 0repo 26d ago A scan 236 tokens original MIT
View source ↗ XTND-DYNAMICS/xtnd-mcp-one
Reuse

Borrowing it

Nothing to install: this file belongs to XTND-DYNAMICS/xtnd-mcp-one. 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/XTND-DYNAMICS/xtnd-mcp-one/main/CLAUDE.md
Clone the repo
git clone --depth 1 https://github.com/XTND-DYNAMICS/xtnd-mcp-one

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.

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README.md
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Per session 236 This file is loaded in full into every session.
When invoked 236 The same file — it is already loaded in full.
Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found 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.

ModelPer sessionOnce invoked
Fable 5.1 $0.00236 $0.00236
Opus 5.5 $0.00094 $0.00094
Sonnet 5.5 $0.00047 $0.00047
Haiku 4.5 $0.00024 $0.00024

Measured 2mo ago against content hash f39969c1263e, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

xtnd-mcp-one 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 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.

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.

CLAUDE.md · 19 lines

What it actually says

CLAUDE.md — xtnd-mcp-one

Model Context Protocol (MCP) server for one.com mail server on Cloudflare Workers (one.mcp.xgi.io).

Golden Rules

  1. Commit only what you changed. Stage files explicitly; never git add -A / git add ..
  2. Never commit credentials. .dev.vars contains real mailbox secrets (ONECOM_PASSWORD) and must remain gitignored.
  3. Typecheck and test before committing:
    • npm run check (tsc --noEmit)
    • npm test (offline unit tests)
    • npm run test:live (integration tests against live [email protected] account)

Commands

  • npm run dev: Start local Wrangler dev server on :8787.
  • npm run check: Run TypeScript compiler typecheck.
  • npm test: Run offline unit test suite.
  • npm run test:live: Run live integration test against one.com.
  • npm run deploy: Deploy Worker to Cloudflare (one.mcp.xgi.io).
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.

  1. 2mo ago First seen · 19 lines · 236 tokens per session scan A f39969c1263e

Subscribe to this mod's changes

xtnd-mcp-one CLAUDE.md is an instructions file published in the GitHub repository XTND-DYNAMICS/xtnd-mcp-one (0 stars, last pushed 26d ago), licensed MIT. It adds 236 tokens to every session, about $0.0009 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.

Backend and APIsCloudDevOps and cloudclaudeemailimapmcpmcp-servermodel-context-protocol
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