io.github.Nero-Engine/dataset-join-merge
Dataset Join & Merge
Join two lists of JSON rows on a key, like SQL or VLOOKUP: left, inner, full, anti joins, union.
alive probed 2026-10-05 · HTTP 200
2tools
1.5ktokens in Claude Opus 5.5
1.5ktokens in Claude Code
0.7 %of a 200k context window
895o200k_base estimate
169 msto initialize
92 msto list tools
- Endpoint
- https://dataset-join-merge.nerolabs.workers.dev/mcp (streamable-http)
- Host
- dataset-join-merge.nerolabs.workers.dev
- Protocol
- 2025-06-18
- Reports itself as
- nerolabs-dataset-join-merge 0.1.0
- Capabilities
- tools
- Instructions
- 219 characters
- Claude count
- Claude Opus 5.5, measured 2026-10-05. Counted again when the tool definitions change. Method.
- Repository
- https://github.com/Nero-Engine/dataset-join-merge-mcp
- Website
- https://github.com/Nero-Engine/dataset-join-merge-mcp
- Registry
- active, updated 2026-09-13 · registry entry
- Reachable
- 6 of the last 6 probes
Most expensive tools
| Tool | Tokens (o200k) | Share of this server |
|---|---|---|
| join_rows | 827 | 92 % |
| list_capabilities | 68 | 8 % |
History
We add a row when the result changes. A server with no change keeps its last row.
| Probed | Result | Init | Tools | Claude | o200k |
|---|---|---|---|---|---|
| 2026-10-05 14:24 | alive | 169 ms | 2 | 1.5k | 895 |
| 2026-10-05 00:30 | alive | 96 ms | 2 | 895 | |
| 2026-10-04 10:02 | alive | 252 ms | 2 | 895 | |
| 2026-10-04 07:56 | alive | 232 ms | 2 | 895 | |
| 2026-10-03 20:36 | alive | 320 ms | 2 | 895 | |
| 2026-10-03 17:52 | alive | 182 ms | 2 | 895 |
Badge and feed
[](https://mcpcost.ulehla.dev/s/io.github.Nero-Engine/dataset-join-merge)
An entry for every probe that changed the result, the tool count or the token cost: Atom feed. Add it to a feed reader or a Slack RSS app to hear when the server stops answering or its tool set grows.