TL;DR
once is a Model Context Protocol (MCP) server. Run a side effect exactly once under retries, redelivery, and concurrent workers. Install with: uvx once-kernel. Source: https://github.com/aurumflux20/once-kernel. Compatible with MCP clients such as Claude Desktop, Cursor, Cline and Windsurf.
once
Run a side effect exactly once under retries, redelivery, and concurrent workers.
Install Command
uvx once-kernelFrequently Asked Questions
once is a Model Context Protocol server that Run a side effect exactly once under retries, redelivery, and concurrent workers.
You can install it by running the install command: `uvx once-kernel`. It then becomes available to any MCP-compatible client such as Claude, Cursor, Cline, Windsurf.
The once MCP Server is compatible with any client that speaks the Model Context Protocol — including Claude, Cursor, Cline, Windsurf.
It is released under the Apache-2.0 license.
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Details
- Agent Rank
- 0.0
- License
- Apache-2.0
- Last Updated
- Aug 12, 2026
- Languages
- Python
Client Compatibility
Speaks the Model Context Protocol — works with any compatible client.