ISO Week Number
https://iso-week.gumballtools.com/api/mcp ↗
Description
ISO 8601 week numbers: date to week, week to date, weeks-per-year.
What our measurements say
ISO Week Number is a remote MCP server published at iso-week.gumballtools.com. It has been probed 6 times since 9/12/2026. It answered in 6 of them (100.0%), a near-uninterrupted record. Median response time is 1,540 ms, a delay an agent will notice. It offers a narrow, focused set of 1 tools. On the protocol side it speaks the 2026-07-28 stateless spec.
Agent readability score
Can an LLM agent pick the right tool here — names, descriptions and parameter clarity are assessed.
Agent readability score
Strengths
- Clear purpose for converting dates and ISO weeks
- Use cases (sprint planning, reporting) are explicitly mentioned
Weaknesses
- Input parameter lacks format examples and validation rules
- No error handling documentation for invalid dates/weeks
- Tool name 'run' is generic and non-descriptive
run— Input parameter 'input' lacks format specification (e.g., 'YYYY-MM-DD' or 'WXX-YYYY')
Verdict
Event narrative
Sign up free to generateRaw observations
| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-13 01:33:33 | Dual-era | 200 | 1540 | 200 | 1519 | 2026-07-28 |
| 2026-09-12 23:31:36 | Dual-era | 200 | 1981 | 200 | 1943 | 2026-07-28 |
| 2026-09-12 21:29:15 | Dual-era | 200 | 1592 | 200 | 1485 | 2026-07-28 |
| 2026-09-12 19:27:29 | Dual-era | 200 | 1416 | 200 | 1477 | 2026-07-28 |
| 2026-09-12 17:24:09 | Dual-era | 200 | 1457 | 200 | 1438 | 2026-07-28 |
| 2026-09-12 15:21:42 | Dual-era | 200 | 1925 | 200 | 1904 | 2026-07-28 |
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 not run this round
- Cold-start: cold 189ms → warm 189ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
runConverts between calendar dates and ISO 8601 week numbers, in either direction, and reports how many weeks an ISO year has. Use this whenever a date needs to be expressed as a week number, or a week number needs to be turned back into a date — sprint planning, report periods, "week 37" style scheduling, or reconciling two systems that disagree about what week it is. DO NOT compute this yourself with day-of-year divided by 7. ISO 8601 week 1 is defined as the week (Monday-Sunday) containing the year's first Thursday, not the week containing January 1st. This has two consequences that are easy to get wrong from memory: late-December dates can belong to ISO week 1 of the NEXT calendar year, and early-January dates can belong to ISO week 52 or 53 of the PREVIOUS calendar year. A year has 53
inputstringrequired
Availability history
Each block is one measurement round. Green: working response. Amber: responded but the server was returning errors (5xx). Red: no response at all.
Era history
Each cell is one probe run. Faded cells are incomplete probes — one leg did not answer, so the era is inconclusive.
Response time history
The two probe legs separately: modern server/discover and legacy initialize.
Event log
Derived by comparing consecutive probes — changes in era, protocol version, build and reachability.
- Added to watch — era: Dual-era
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[](https://mcpmetrics.io/servers/com-gumballtools-iso-week)<a href="https://mcpmetrics.io/servers/com-gumballtools-iso-week"><img src="https://mcpmetrics.io/badge/com.gumballtools/iso-week/era.svg" alt="mcpmetrics"></a>You are seeing the last 7 days. Sign up for the full history. Which check failed and why is in the dashboard.
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