Skip to content
mcp/harbor
Verified official

ONCE — Exactly-Once Reliability for AI Agent Actions MCP

v0.8.4

io.github.gsterlingpress/once

Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts.

transport:streamable-http
View source Website

Target client

run in your project directory 

claude mcp add --transport http once https://optimistic-compassion-production.up.railway.app/mcp

Adds it for this project only. Append --scope user to make it available everywhere. Claude Code docs

This listing does not declare its tools. Connect the server and your client will discover them on the handshake.