Epoch Calculator
Description
Unix timestamps, DST-aware time zone conversion, durations, cron schedules, and holiday countdowns
What our measurements say
Epoch Calculator is a remote MCP server published at epochcalc.com. It has been probed 8 times since 9/12/2026. It answered in 8 of them (100.0%), a near-uninterrupted record. Median response time is 440 ms, placing it among the faster endpoints. It offers a narrow, focused set of 8 tools. On the protocol side it still runs 2025-11-25 and has not moved to the newer spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Tool names are mostly descriptive and indicate their primary function.
- Descriptions provide clear use cases and output formats for most tools.
Weaknesses
- Some tool names (e.g., 'epoch_math') are less intuitive than others.
- Parameter structures for 'add' and 'subtract' in 'epoch_math' are not explicitly defined.
- Error handling and validation constraints are not explicitly documented.
epoch_math— Parameters 'add' and 'subtract' lack explicit structure definitions.days_until— Description does not explicitly mention listing known events when no arguments are provided.convert_timestamp— Overlaps with 'parse_datetime' in timestamp conversion but serves distinct purposes.
Verdict
Event narrative
Risk: low
Advice
Schema compliance
tools/list structure, inputSchema validity, and a functional smoke test — the components of the 0-100 score.
- tools/list schema valid
- inputSchema is valid JSON Schema
- Smoke test passed · last run:
- Cold-start: cold 50ms → warm 46ms (penalty 4ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
time_nowThe current time: Unix epoch in seconds and milliseconds, ISO 8601, and the local wall-clock time in a given IANA time zone with its current UTC offset and DST status. Use this before any relative date reasoning.
timezonestring
convert_timestampConvert a Unix timestamp (seconds or milliseconds; auto-detected unless unit is given) to a human-readable date in a time zone, with ISO 8601, RFC 2822, UTC offset, DST flag, weekday, and a relative phrase like "3 days ago".
timestampnumberrequiredunitstringtimezonestring
parse_datetimeParse a date/time string (ISO 8601, RFC 2822, HTTP date, SQL "YYYY-MM-DD HH:mm:ss", or a Unix timestamp) into a Unix timestamp and a normalized description. Strings without an offset are interpreted in the given time zone.
inputstringrequiredtimezonestring
convert_timezoneConvert a wall-clock date/time from one IANA time zone to another, correctly across daylight-saving transitions. Returns both sides with offsets, the hour difference at that instant, and whether either zone is on DST.
datetimestringrequiredfrom_timezonestringrequiredto_timezonestringrequired
date_durationThe exact duration between two dates or date-times: calendar years/months/days, plus total days, hours, minutes and seconds, and the number of weekdays (Mon-Fri). Handles leap years and DST via the IANA database.
startstringrequiredendstringrequiredtimezonestringinclude_endboolean
epoch_mathAdd to or subtract from a Unix timestamp in calendar-aware units (years, months, weeks, days, hours, minutes, seconds) in a time zone, e.g. "now + 30 days" or "1748736543 - 3 months". Returns the resulting timestamp in every format.
timestampnumberaddobjectsubtractobjecttimezonestring
cron_next_runsExplain a 5- or 6-field cron expression in plain English and list its next run times in a time zone (as ISO 8601 and Unix timestamps). Use to answer "when does this cron job run next?" or to validate an expression.
expressionstringrequiredtimezonestringcountintegerfromstring
days_untilCountdown to a holiday or to a date: days, hours and minutes remaining, and the next occurrence date. Pass an event slug (e.g. "christmas", "thanksgiving", "easter", "super-bowl") or a date (YYYY-MM-DD). Call with no arguments to list the known events.
eventstringdatestringtimezonestring
Availability history
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Legacy
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