MCP server

Dataset Join & Merge

io.github.Nero-Engine/dataset-join-merge

Checked 26 Oct 2026, 08:29 UTC · Connected to it and listed its tools

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

Working at last checkAbout 1,140 tokens per request once connected2 tools

Website Source

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

At a glance

Type: MCP server
Publisher: Not verified
Status: Working at last check
Tools: 2
Token cost: About 1,140 tokens per request
Sets up in: Claude Code, Claude Desktop, Codex, Gemini CLI, Cursor, VS Code, Antigravity, ChatGPT, OpenAI API, Grok
Last checked: 26 Oct 2026, 08:29 UTC

Connect it to your agent

Add to Cursor Add to VS Code VS Code Insiders

Opens the app, which shows the server and asks you to confirm. For other apps, copy the setup below.

Claude Code

claude mcp add --transport http dataset-join-merge https://dataset-join-merge.nerolabs.workers.dev/mcp

Claude Desktop

Settings → Connectors → Add custom connector, and paste the URL.

Codex (config.toml)

[mcp_servers.dataset-join-merge]
url = "https://dataset-join-merge.nerolabs.workers.dev/mcp"

Gemini CLI

{"mcpServers":{"dataset-join-merge":{"httpUrl":"https://dataset-join-merge.nerolabs.workers.dev/mcp"}}}

Cursor

{"mcpServers":{"dataset-join-merge":{"url":"https://dataset-join-merge.nerolabs.workers.dev/mcp"}}}

VS Code

{"servers":{"dataset-join-merge":{"type":"http","url":"https://dataset-join-merge.nerolabs.workers.dev/mcp"}}}

Antigravity

agy mcp add dataset-join-merge https://dataset-join-merge.nerolabs.workers.dev/mcp

ChatGPT

Settings → Apps & Connectors → Advanced settings: turn on Developer mode, then Create a connector and paste the URL. Which plans can do this varies.

OpenAI API (Responses tools)

{"type":"mcp","server_label":"dataset-join-merge","server_url":"https://dataset-join-merge.nerolabs.workers.dev/mcp","require_approval":"always"}

Grok (xAI API tools)

{"type":"mcp","server_label":"dataset-join-merge","server_url":"https://dataset-join-merge.nerolabs.workers.dev/mcp"}

Tools

join_rows ~1046 tokens
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
list_capabilities ~94 tokens
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.

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