LocalFree

once MCP server

aurumflux20/once-kernel

Run a side effect exactly once under retries, redelivery, and concurrent workers.

0 GitHub stars
Source code

Install once in Claude Code

Claude Code
claude mcp add once -- uvx once-kernel
mcp.json (Claude Desktop, Cursor, VS Code, Windsurf)
{
  "mcpServers": {
    "once": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

Frequently asked questions

What does the once MCP server do?

Run a side effect exactly once under retries, redelivery, and concurrent workers.

Is the once MCP server free?

Yes, most likely. Open source and no paid account or API key is mentioned in the listing. Check the provider for current pricing.

Does once run locally or remotely?

Local. Runs on your machine (stdio). You install it with npx, uvx, Docker or from source.

How do I add once to Claude Code?

Run: claude mcp add once -- uvx once-kernel

More other tools & integrations MCP servers

View all

One MCP, many parsers

0

adelaidasofia/parse-mcp

One MCP, many parsers. Routes between markitdown, Docling, and LlamaParse. Plus an interpret tool…

LocalFree

Omiss

0

qso-graph/omiss-mcp

OMISS MCP server. Net schedule, nets on the air, members, check-in history, awards.

LocalFree

Onet

0

pipeworx-io/mcp-onet

ONET MCP — wraps the ONET Web Services (US DOL) occupation taxonomy (services.onetcenter.org).…

Local + RemoteFree

Omega

0

aien-dev/omega-mcp

Compile and run Omega (.om) programs in a sandbox, and look up Omega errors and keywords.

LocalFree

OnlineAfspraken Slots

0

RichieB2B/onlineafspraken-slots-mcp

Read available slots from a public OnlineAfspraken widget URL without an account.

LocalFree

OLVM AIops

0

AIops-tools/OLVM-AIops

Governed OLVM / oVirt 4.5 ops — 17 MCP tools: inventory, health, capacity, diagnosis; audited.

LocalFree