Search / com.gumballtools/timezone-truth
protogridR0· no sign-inConvert times between IANA zones and detect skipped or ambiguous DST local times.
v0.1.0 · active · repository · website · descriptor JSON · versions
{
"mcpServers": {
"timezone-truth": {
"type": "http",
"url": "https://timezone-truth.gumballtools.com/api/mcp"
}
}
}claude mcp add --transport http timezone-truth https://timezone-truth.gumballtools.com/api/mcp[mcp_servers.timezone-truth]
url = "https://timezone-truth.gumballtools.com/api/mcp"
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"timezone-truth": {
"type": "remote",
"url": "https://timezone-truth.gumballtools.com/api/mcp",
"enabled": true
}
}
}{
"mcpServers": {
"timezone-truth": {
"type": "http",
"url": "https://timezone-truth.gumballtools.com/api/mcp"
}
},
"deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=timezone-truth&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vdGltZXpvbmUtdHJ1dGguZ3VtYmFsbHRvb2xzLmNvbS9hcGkvbWNwIn0%3D"
}{
"servers": {
"timezone-truth": {
"type": "http",
"url": "https://timezone-truth.gumballtools.com/api/mcp"
}
}
}{
"mcpServers": {
"timezone-truth": {
"httpUrl": "https://timezone-truth.gumballtools.com/api/mcp"
}
}
}extensions:
"timezone-truth":
enabled: true
name: "timezone-truth"
type: streamable_http
uri: "https://timezone-truth.gumballtools.com/api/mcp"
timeout: 300
protocol.modernsupports 2026-07-28 (server/discover)protocol.statelessanswers without a sessionprotocol.transportstreamable HTTPprotocol.list_ttltools/list declares ttlMs 0, so clients re-fetch it on every useauth.prm, auth.as_metadata, auth.cimdno remote uses OAuthauth.secret_in_urlno templated URLtools.descriptionsevery tool has a descriptiontools.description_length1 tools have descriptions over 1,024 characters, which crowds the contexttools.schemasevery tool has an object input schematools.annotations1 of 1 tools declare readOnlyHint or destructiveHinttools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: convert_time (destructiveHint, idempotentHint)tools.token_costabout 645 tokens to load every tooltools.api_dumptools are not a one-to-one API dumpstability.changesno tool changes in 30 daysstability.rug_pullno tool changed its meaning under the same namedeps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI packageNo tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.
Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.
+repository +dns-namespace +website +reachable +uptime-100% ~updated-45d-ago -duplicate-repo(16 names)
Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.
| remote | auth | reachable | uptime 30d | p50 | protocol | last ok |
|---|---|---|---|---|---|---|
https://timezone-truth.gumballtools.com/api/mcp streamable-http | none | yes | 100% | 877 ms | 2026-07-28 | 2026-10-20 |
convert_timeread-only | 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 hour of local time DOES NOT EXIST. Asked to convert 02:30 on that date, a model will return a plausible timestamp for a time that never happens. This tool returns null and says why. - On the fall-back date, an hour happens TWICE. There are two correct answers an hour apart; this returns both rather than silently choosing. - The gap between two zones is not constant. Zones start and end daylight saving on different dates, so a cached offset is wrong for weeks each year. - Not all offsets are whole hours: India is +05:30, Nepal +05:45. Input: `time` must be YYYY-MM-DD HH:MM (or with T, and optional seconds) — free-form dates are refused rather than guessed. `from` and `to` must be full IANA names such as "America/New_York". ABBREVIATIONS ARE REJECTED, deliberately, even though most runtimes accept them. Node resolves "BST" to Bangladesh Standard Time (UTC+06:00) when nearly everyone writing it means British Summer Time (UTC+01:00) — a five-hour error that yields a perfectly plausible timestamp. Same for CST, IST, PST, and EST. Returns: the chosen UTC instant (null if the local time does not exist), every candidate instant, both zone readings with the offset and abbreviation that applied on THAT date, the difference between the zones, upcoming clock changes for both, and warnings. Check `warnings` for severity "error" before using the result. |
Schemas: list_tools.
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{
"name": "com.gumballtools/timezone-truth",
"title": "Timezone Truth",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://timezone-truth.gumballtools.com/api/mcp",
"type": "streamable-http"
}
],
"version": "0.1.0",
"repository": {
"url": "https://github.com/bwalvoord/gumball",
"source": "github"
},
"websiteUrl": "https://timezone-truth.gumballtools.com",
"description": "Convert times between IANA zones and detect skipped or ambiguous DST local times."
}