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

io.github.GSterlingPress/once

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

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

Copy-paste configuration for popular MCP clients.

transport: http

Config generated by PluginBench — verify against the source before use.

~/.cursor/mcp.json

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

Active

Resolve whether an uncertain side-effecting action completed before software retries it.

JavaScript

Active

Choose HTTP, browser, machine endpoint, or avoid before an agent visits an unfamiliar URL.

JavaScript

Active

Choose the safest next action after an API, MCP, or agent failure before retrying.

JavaScript

Active

Decide whether an agent should reuse cached URL knowledge or fetch the resource again.

JavaScript

Maintained

MySQL MCP server: browse schema, query, CRUD. Delete/drop gated by user approval.

JavaScript

MIT

Maintained

Server ops MCP: logs, monitoring, code edit, Nginx & certs. Local + SSH, confirmations & redaction.

TypeScript

MIT