Dev tools · Official remote MCP server

The ONCE — Exactly-Once Reliability for AI Agent Actions MCP server,
connected in one click.

Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts. Connect the official ONCE — Exactly-Once Reliability for AI Agent Actions MCP server to Claude, ChatGPT, or Cursor through gate — one gateway URL, no config files, security-checked.

Connect ONCE — Exactly-Once Reliability for AI Agent Actions free How it works

Free to start · No credit card · No hosting needed

Use this server

Add ONCE — Exactly-Once Reliability for AI Agent Actions 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 once https://optimistic-compassion-production.up.railway.app/mcp

Run in your terminal, then restart Claude Code.

ONCE — Exactly-Once Reliability for AI Agent Actions · https://optimistic-compassion-production.up.railway.app/mcp

What you can do

What your AI can do with ONCE — Exactly-Once Reliability for AI Agent Actions

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

“Use “once_demo”: SAFE ZERO-SETUP DEMO. Call this tool twice with the same id to see ONCE suppress the second execution. Use this when evaluating or discoveri.”

“Use “once_execute”: CALL THIS when an AI agent is about to perform or retry a consequential external side effect where duplication would be harmful: purchase, r.”

Security check

How secure is the ONCE — Exactly-Once Reliability for AI Agent Actions MCP server?

Every server in the gate directory has to pass the same four checks before your AI can touch it. Here's how ONCE — Exactly-Once Reliability for AI Agent Actions holds up.

✓ Verified directory serverONCE — Exactly-Once Reliability for AI Agent Actions · github.com

Official endpoint

Operated by ONCE — Exactly-Once Reliability for AI Agent Actions (github.com) at its documented MCP endpoint — not a third-party mirror or community re-host.

No sign-in needed

This server only exposes public data — no account and no credentials are involved when you connect.

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 ONCE — Exactly-Once Reliability for AI Agent Actions adds or changes tools later, gate re-scans and alerts you — before your AI acts on the change.

Run the free scanner on ONCE — Exactly-Once Reliability for AI Agent Actions's server →

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 ONCE — Exactly-Once Reliability for AI Agent Actions

Choose ONCE — Exactly-Once Reliability for AI Agent Actions in the gate directory. No sign-in needed.

Use it anywhere

ONCE — Exactly-Once Reliability for AI Agent Actions's tools are live in every AI client you've connected — with rules and logging built in.

Connect ONCE — Exactly-Once Reliability for AI Agent Actions free

Free to start · No credit card · No hosting needed

Straight from the server

The actual tools ONCE — Exactly-Once Reliability for AI Agent Actions exposes

Fetched live from the official endpoint and re-checked daily by gate — not marketing copy.

once_demo — SAFE ZERO-SETUP DEMO. Call this tool twice with the same id to see ONCE suppress the second execution. Use this when evaluating or discoveri

once_execute — CALL THIS when an AI agent is about to perform or retry a consequential external side effect where duplication would be harmful: purchase, r

Author

Who runs the ONCE — Exactly-Once Reliability for AI Agent Actions MCP server?

github.com

Homepage More servers from github.com →

Own this server? Claim the listing →

Server facts

The ONCE — Exactly-Once Reliability for AI Agent Actions MCP server at a glance

Endpointhttps://optimistic-compassion-production.up.railway.app/mcp

Operated byONCE — Exactly-Once Reliability for AI Agent Actions (github.com)

CategoryDev tools

Sign-inNone — public data only

Available in gateYes — one-click connect

Works withClaude, ChatGPT, Cursor & any MCP client

FAQ

Questions, answered

Is there an official ONCE — Exactly-Once Reliability for AI Agent Actions MCP server?

Yes — ONCE — Exactly-Once Reliability for AI Agent Actions operates its own remote MCP server at optimistic-compassion-production.up.railway.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 ONCE — Exactly-Once Reliability for AI Agent Actions to Claude or ChatGPT?

Add gate's gateway URL to your AI client once, then pick ONCE — Exactly-Once Reliability for AI Agent Actions in the directory. No account or sign-in is needed. From then on, ONCE — Exactly-Once Reliability for AI Agent Actions's tools are available in every client you've connected to gate.

Do I need to host anything?

No. ONCE — Exactly-Once Reliability for AI Agent Actions runs the server, and gate is fully managed. You just connect one URL — there's nothing to install, deploy, or maintain.

Is the ONCE — Exactly-Once Reliability for AI Agent Actions 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.