once

What you can do with once

once is a Model Context Protocol (MCP) server published by aurumflux20. It ranks #62,121 of 169,405 active servers on MCP Toplist. once is listed on Official MCP, with 3 tracked versions. It was first listed on Aug 6, 2026 and most recently updated on Aug 7, 2026.

What once can and cannot do

Not verifiedMCP Toplist has not catalogued this server's tools or limitations. The repository README lists them.

What you need before using once

No runtime, credential or payment requirements are recorded for this server beyond the declaration above.

Connect once and confirm it works

claude mcp add once-kernel -- uvx once-kernel

[mcp_servers.once-kernel]
command = "uvx"
args = ["once-kernel"]

{
  "mcpServers": {
    "once-kernel": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

{
  "mcpServers": {
    "once-kernel": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

{
  "servers": {
    "once-kernel": {
      "type": "stdio",
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

{
  "mcpServers": {
    "once-kernel": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

{
  "mcpServers": {
    "once-kernel": {
      "command": "uvx",
      "args": [
        "once-kernel"
      ]
    }
  }
}

When to choose another server

• EffectFence#18,814
• Seal#40,351

No task-specific alternatives are catalogued for onceyet; the list above is its publisher's other servers.

What changed, and when this was checked

First listed

Aug 6, 2026

Latest version published

Aug 7, 2026

Version history

3 versions tracked (below)

Requirements evidence

Declared by the Official MCP Registry, last synced Nov 5, 2026. Not independently verified by MCP Toplist.

Profile checked

Not yet — purpose, capabilities and requirements above come from registry data only

Ranking data as of

Aug 7, 2026

Do you maintain once? Claim it to correct or enrich this profile.

Show your rank

Maintain this server? Add the live rank badge to your README — it updates automatically as the leaderboard changes.

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