ONCE — Exactly-Once Reliability for AI Agent Actions
io.github.GSterlingPress/once
Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts.
Description as published in the official MCP registry.
Answers the MCP handshake and lists its tools. Checked 2026-10-04.
What we measured
| Endpoint | https://optimistic-compassion-production.up.railway.app/mcp | registry |
|---|---|---|
| Handshake | Answers the MCP handshake and lists its tools (9,442 ms) | our check, 2026-10-04 |
| Protocol version | 2025-11-25 | our check, 2026-10-04 |
| Tools (2) | once_demo, once_execute | tools/list, 2026-10-04 |
| GitHub stars | 0 | github.com/GSterlingPress/once-api |
| Last push | 2026-09-13 | GitHub API |
| Registry version | 0.8.4 · active · updated 2026-09-13 | registry |
Signed reports
No signed reports yet. A report carries a signed decision record from the reporter's gate, so it shows a real call went through, not just an opinion. How to file one.
Connect
claude mcp add --transport http once https://optimistic-compassion-production.up.railway.app/mcpCommands are built from the registry entry. Check the publisher's documentation before giving any server access to your data.
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Badge for your README
Shows the result of our latest check and links back to this page.
[](https://openforallofus.com/tools/io.github.GSterlingPress/once)Agents can read this page as data: MCP endpoint https://openforallofus.com/api/mcp, tool get_tool with name io.github.GSterlingPress/once.