Dataset Join & Merge MCP server

• join_rowsFree

  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 with fields from a lookup table (left join), keep only the overlap (inner), combine two sources into one table (full), find rows in one list that are missing from the other (leftAnti or rightAnti), or stack two same-shape lists (union). Keys match case-insensitively with whitespace trimmed by default, and the key can have a different name on each side (email on the left, contact_email on the right). Input and output rows are capped per call; a many-to-many join that would exceed the output cap is refused with the predicted row count, never truncated. Call list_capabilities for the exact limits.

• list_capabilitiesFree

  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.

• –Code scanremote-only server, no package to scann/a
• Live reliabilityremote reachable in 150ms20/20
• Tool poisoning2 tool descriptions checked15/15
• Auth qualityopen endpoint, read-only tools10/15
• Maintenancelast push 7 days ago15/15
• Maintainer identityregistry namespace matches repository owner6/10

Dataset Join & Merge: common questions

Is Dataset Join & Merge MCP server safe?

Yes, by our scan: it is graded A (88/100). Read the Dataset Join & Merge safety report

How do I install Dataset Join & Merge?

It runs remotely at dataset-join-merge.nerolabs.workers.dev. Add it to Claude Code, Claude Desktop or Cursor with the snippets above, or call it through the mcp.market gateway without installing anything.

Does Dataset Join & Merge need an API key?

Not as far as the registry entry and our scan can tell: no credentials are declared or required.

Is Dataset Join & Merge maintained?

The last commit was 7 days ago (2026-09-13). The latest release is v0.1.0.

Is Dataset Join & Merge up?

100% of our last 1 checks got an answer. We check remote servers about four times a day.

What can I use instead of Dataset Join & Merge?

Servers from other publishers that do the same job: GeoLens MCP server, DBHub MCP server and LINQ to DB MCP server. Compare all Dataset Join & Merge alternatives.