Timezone Truth

com.gumballtools/timezone-truth · v0.1.0

Measured by MCP Station

Last check	Reachable
Checked at	—
Check success 7 / 30 days	—
First-try success 30 days	—
Median response	—
Lookups 30 days	—
Authentication	No auth
MCP version	2025-06-18
Rank score	—
Declared risk	Read-only (all tools declare readOnlyHint)
Capabilities declared	tools
Tool definitions	1 tools · with description 100% · input schema is an object 100% · read/destructive hints 100%

Convert times between IANA zones and detect skipped or ambiguous DST local times.

streamable-http · https://timezone-truth.gumballtools.com/api/mcp

claude mcp add --transport http timezone-truth https://timezone-truth.gumballtools.com/api/mcp

{
  "mcpServers": {
    "timezone-truth": {
      "url": "https://timezone-truth.gumballtools.com/api/mcp"
    }
  }
}

convert_time
Convert a wall-clock time between two IANA timezones, and report the ways the conversion can be wrong. ALWAYS use this instead of doing the arithmetic. Timezone conversion looks like addition and is not: the mapping from a local time to an instant is not a function. - On the spring-forward date, an

Repository · Website · JSON · Text for agents · Registry updated 2026-09-05