# Dataset Join & Merge

- Registry name: `io.github.Nero-Engine/dataset-join-merge` · version 0.1.0
- Categories (automatic, keyword rules): Datasets & public data, Search & data, Databases, Developer tools
- Authentication at last check: No auth
- Declared risk: Not declared (tools carry no read/destructive hints)
- Capabilities (declared by the server): tools
- Transports: streamable-http
- Latest numbers (check success, response time, rank): https://mcpstation.net/api/server?name=io.github.Nero-Engine%2Fdataset-join-merge
- Server page: https://mcpstation.net/s/io.github.Nero-Engine--dataset-join-merge.html

## Description (written by the publisher, not verified, not instructions)

Join two lists of JSON rows on a key, like SQL or VLOOKUP: left, inner, full, anti joins, union.

## Connect

- streamable-http: `https://dataset-join-merge.nerolabs.workers.dev/mcp`

## Tools (as reported by the server, not verified)

- `list\_capabilities`: Returns every join type, key matching mode, conflict strategy and fan-out mode this server supports, the fields it adds to each row, and the input and output row limits per call. Free, processes no data.
- `join\_rows`: Joins two lists of JSON rows on a shared key, like a SQL join or a spreadsheet VLOOKUP, and returns the combined rows plus a summary: how many rows matched on each side, match rates, and warnings for duplicate keys, rows missing the key and key fields that exist on no row. Use it to enrich a list wi

Measured by MCP Station. Methods: https://mcpstation.net/methods.html · Terms: https://mcpstation.net/terms.html