Docs & AI · Official remote MCP server

The Letterin MCP server,
connected in one click.

Tailor a CV to a job posting: score the match, propose a reviewable rewrite, export PDF or Word. Connect the official Letterin MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect Letterin free How it works

Connects with your personal API key — free to start, no credit card

Use this server

Add Letterin to your AI in one minute

Pick your client. Copy, paste, done — or let gate handle sign-ins and policies for you.

claude mcp add --transport http letterin https://letterin.app/api/mcp --header "Authorization: Bearer <your key>"

Run in your terminal, then restart Claude Code. This server needs an API key — replace <your key> with yours.

Letterin · https://letterin.app/api/mcp

What you can do

What your AI can do with Letterin

Real prompts you can type the moment it's connected — no setup, no docs to read.

“What can Letterin do for me?”

“Show me the tools Letterin exposes.”

Security check

How secure is the Letterin MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how Letterin holds up.

✓ Verified directory serverLetterin · letterin.app

Official endpoint

Operated by Letterin (letterin.app) at its documented MCP endpoint — not a third-party mirror or community re-host.

OAuth sign-in — your account, your rules

You grant access from your own Letterin account and can revoke it there at any time. gate never sees your password.

Scanned before it goes live

gate checks every tool for prompt injection, hidden instructions, data-exfiltration hints, and over-broad permissions before the server is available through your gateway.

Watched for drift

If Letterin adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Letterin's server requires OAuth, so it can't be scanned anonymously — connect it in gate and the same scan runs automatically before it goes live.

How it works

Connected in three steps

Connect your gate

Add one gateway URL to Claude, ChatGPT, or any MCP client. One-time setup, about two minutes.

Pick Letterin

Choose Letterin in the gate directory. Sign in to your Letterin account to grant access.

Use it anywhere

Letterin's tools are live in every AI client you've connected — with rules and logging built in.

Connect Letterin free

Free to start · No credit card · No hosting needed

Author

Who runs the Letterin MCP server?

letterin.app

Homepage More servers from letterin.app →

Own this server? Claim the listing →

Server facts

The Letterin MCP server at a glance

Endpointhttps://letterin.app/api/mcp

Operated byLetterin (letterin.app)

CategoryDocs & AI

Sign-inOAuth — your account, revocable anytime

Available in gateYes — with your API key / personal access token

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official Letterin MCP server?

Yes — Letterin operates its own remote MCP server at letterin.app. gate connects you to that official endpoint and adds security scanning, per-tool access rules, and an activity log on top.

How do I connect Letterin to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick Letterin in the directory. You sign in to Letterin via OAuth to grant access. From then on, Letterin's tools are available in every client you've connected to gate.

Do I need to host anything?

No. Letterin runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the Letterin MCP server safe to connect?

It's the vendor's official endpoint, and gate scans its tools for prompt injection and hidden instructions before it goes live, re-checks it whenever it changes, and lets you allow, block, or require approval for every single tool.