Other · Remote MCP server
ONCE — Exactly-Once Reliability for AI Agent Actions
Prevent duplicate AI-agent side effects with idempotency, verification, and durable receipts.
Visit ONCE — Exactly-Once Reliability for AI Agent Actions's website
What the MCP Registry states
The entry as published to the official MCP Registry (read 2026-10-04), latest version.
- Registry name
io.github.GSterlingPress/once- Version
- 0.8.4
- Status
- Active
- Category
- other
- Transport
- Streamable HTTP
- Published
- 2026-09-13
- Updated
- 2026-09-13
- Publisher
- GSterlingPress (GitHub) · 6 servers with pages here
- Website
- github.com/GSterlingPress/once-api
- Repository
- github.com/GSterlingPress/once-api
- Source
- Registry API entry
Remote endpoints
| Transport | URL | Headers declared |
|---|---|---|
| Streamable HTTP | https://optimistic-compassion-production.up.railway.app/mcp | None |
How to connect ONCE — Exactly-Once Reliability for AI Agent Actions
ONCE — Exactly-Once Reliability for AI Agent Actions is a remote MCP server: there is nothing to install. Its endpoint is https://optimistic-compassion-production.up.railway.app/mcp, served over Streamable HTTP. In an assistant that accepts remote MCP servers (often under a setting named connectors, integrations or tools), add a new server and give it this URL; in a client configured by file, add it as a remote (HTTP) server with the same URL.
No headers are declared in the registry entry. If the server needs you to sign in, a client that supports MCP authorization opens the service's own sign-in page when it first connects.
Derived from the registry entry, not tested here. What the server does, and on what terms, is set by its publisher; check its repository or website before giving it access to your accounts or files. How to add an MCP server to an assistant · Before you connect
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| RECOVER — Decide Safely After a Failed Machine ActionChoose the safest next action after an API, MCP, or agent failure before retrying. | Remote · HTTP |
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