Dataset Diff & Change Detector
https://dataset-diff-detector.nerolabs.workers.dev/mcp ↗
Description
Compare two versions of a JSON row list: what was added, removed or changed, field by field.
What our measurements say
Dataset Diff & Change Detector is a remote MCP server published at dataset-diff-detector.nerolabs.workers.dev. It has been probed 4 times since 9/13/2026. It answered in 4 of them (100.0%), a near-uninterrupted record. Median response time is 278 ms, placing it among the faster endpoints. It offers a narrow, focused set of 2 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
Agent readability score
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| Run | Era | Modern | ms | Legacy | ms | Versions |
|---|---|---|---|---|---|---|
| 2026-09-13 10:45:14 | Legacy | 200 | 248 | 200 | 252 | 2025-06-18 |
| 2026-09-13 08:43:04 | Legacy | 200 | 314 | 200 | 330 | 2025-06-18 |
| 2026-09-13 06:40:42 | Legacy | 200 | 290 | 200 | 278 | 2025-06-18 |
| 2026-09-13 04:35:29 | Legacy | 200 | 150 | 200 | 149 | 2025-06-18 |
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 40ms → warm 42ms (penalty 0ms)
Tools
Tools the server advertised in the latest measurement — measured, not catalog-claimed.
list_capabilitiesReturns the exact matching and comparison rules diff_rows uses, the shape and order of its output rows, and the maximum rows per call. Call this first if you are unsure how values are compared. Free, processes no data.
diff_rowsCompares two versions of the same list of JSON rows (a before and an after snapshot, such as yesterday's and today's price list, product feed or CRM export) and returns one row per difference: status added, removed or changed, the key, the old and new values, and changedFields naming exactly which fields moved. Set keyFields to the field(s) that identify a row (sku, id, email); without it rows match on full content and an edited row shows as removed plus added. Comparison is exact: "19.99" (text) and 19.99 (a number) differ, as do "Blue" and "blue " and null and a missing field; nested objects compare by value. Put always-changing fields such as timestamps in ignoreFields. The summary counts added, removed, changed and unchanged rows and warns about duplicate keys, rows missing a key, and
oldRowsarrayrequirednewRowsarrayrequiredkeyFieldsarraycompareFieldsarrayignoreFieldsarrayincludeUnchangedboolean
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: Legacy
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[](https://mcpmetrics.io/servers/io-github-nero-engine-dataset-diff-detector)<a href="https://mcpmetrics.io/servers/io-github-nero-engine-dataset-diff-detector"><img src="https://mcpmetrics.io/badge/io.github.Nero-Engine/dataset-diff-detector/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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