`username_to_uuid_at`

Pack: mojang · Connect: https://pipeworx.io/mcp (see Connect below for a single-pack URL)

No MCP client? Call it directly: GET https://gateway.pipeworx.io/v1/tools/username_to_uuid_at for the schema, then POST the same URL with its arguments for the data.

Resolve a Minecraft username to the UUID it was assigned at a given Unix epoch timestamp (seconds); useful for historical name lookups.

Parameters

Name	Type	Required	Description
`username`	string	yes
`timestamp`	number	no

Example call

Arguments

{
  "username": "Notch",
  "timestamp": 1609459200
}

curl

curl -X POST https://gateway.pipeworx.io/mojang/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call","params":{"name":"username_to_uuid_at","arguments":{"username":"Notch","timestamp":1609459200}}}'

TypeScript (@pipeworx/sdk)

import { Pipeworx } from '@pipeworx/sdk';
const pipeworx = new Pipeworx();

const result = await pipeworx.call('username_to_uuid_at', {
  "username": "Notch",
  "timestamp": 1609459200
});

More examples

{
  "username": "steve"
}

Response shape

Always returns: id, name

Field	Type	Description
`id`	string	UUID of the player at the given timestamp
`name`	string	Username of the player at the given timestamp

Full JSON Schema

{
  "type": "object",
  "properties": {
    "id": {
      "type": "string",
      "description": "UUID of the player at the given timestamp"
    },
    "name": {
      "type": "string",
      "description": "Username of the player at the given timestamp"
    }
  },
  "required": [
    "id",
    "name"
  ]
}

Connect

Add this to your MCP client config — every tool in the catalog, including this one — or use one-click install buttons:

{
  "mcpServers": {
    "pipeworx": {
      "url": "https://pipeworx.io/mcp"
    }
  }
}

Connect to just the mojang pack

{
  "mcpServers": {
    "mojang": {
      "url": "https://gateway.pipeworx.io/mojang/mcp"
    }
  }
}

See Getting Started for client-specific install steps.

username_to_uuid_at