ONCE — Exactly-Once Reliability for AI Agent Actions MCP server

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

Category: Dev tools

● Online, checked 311 min ago · 498 ms

Source: official MCP Registry entry io.github.GSterlingPress/once · repository

Direct MCP URL and setup

CLAUDE CODE

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

CURSOR / VS CODE (mcp.json)

{ "mcpServers": { "io-github-gsterlingpress-once": { "url": "https://optimistic-compassion-production.up.railway.app/mcp" } } }