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8 clients · secrets stay placeholders

JSON (mcpServers)Claude CodeCodexOpenCodeCursorVS CodeGemini CLIGoose

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

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

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

{
  "$schema": "https://opencode.ai/config.json",
  "mcp": {
    "dataset-join-merge": {
      "type": "remote",
      "url": "https://dataset-join-merge.nerolabs.workers.dev/mcp",
      "enabled": true
    }
  }
}

{
  "mcpServers": {
    "dataset-join-merge": {
      "type": "http",
      "url": "https://dataset-join-merge.nerolabs.workers.dev/mcp"
    }
  },
  "deeplink": "cursor://anysphere.cursor-deeplink/mcp/install?name=dataset-join-merge&config=eyJ0eXBlIjoiaHR0cCIsInVybCI6Imh0dHBzOi8vZGF0YXNldC1qb2luLW1lcmdlLm5lcm9sYWJzLndvcmtlcnMuZGV2L21jcCJ9"
}

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

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

extensions:
  "dataset-join-merge":
    enabled: true
    name: "dataset-join-merge"
    type: streamable_http
    uri: "https://dataset-join-merge.nerolabs.workers.dev/mcp"
    timeout: 300

Quality 79 / 100good

protocol75 · weight 25

warn
protocol.modernnewest supported version is 2025-06-18; 2026-07-28 not supported, older versions are deprecated until 2027-07-28
n/a
protocol.statelessonly applies to 2026-07-28 servers
pass
protocol.transportstreamable HTTP
n/a
protocol.list_ttlonly applies to 2026-07-28 servers

authorizationn/a · weight 15

n/a
auth.prm, auth.as_metadata, auth.cimdno remote uses OAuth
n/a
auth.secret_in_urlno templated URL

tool hygiene71 · weight 30

pass
tools.descriptionsevery tool has a description
pass
tools.description_lengthdescriptions are concise
pass
tools.schemasevery tool has an object input schema
fail
tools.annotationsno tool declares readOnlyHint or destructiveHint, so clients cannot tell safe calls from risky ones
fail
tools.directory_hintsno tool declares all four of readOnlyHint, destructiveHint, idempotentHint and openWorldHint; missing: join_rows (readOnlyHint, destructiveHint, idempotentHint, openWorldHint); list_capabilities (readOnlyHint, destructiveHint, idempotentHint, openWorldHint)
pass
tools.token_costabout 977 tokens to load every tool
pass
tools.api_dumptools are not a one-to-one API dump

stability100 · weight 15

pass
stability.changesno tool changes in 30 days
pass
stability.rug_pullno tool changed its meaning under the same name

dependenciesn/a · weight 15

n/a
deps.known_vulns, deps.mcp_sdk_version, deps.resolvableno npm or PyPI package

2 tools, about 977 tokens to load them all · tool set 64e80d480a5f · checked 2026-10-20 15:26 UTC

Tool changes

No tool definition changes recorded. A server's first observation is its baseline; later probes record what changes.

Checks run on what our credential-free, read-only probes observe; tools are never called and no code audit is performed. How it is computed.

Trust 94 / 100

provenance90

liveness99

freshness85

hygiene100

+repository +namespace-matches-repo +website +reachable +uptime-96% ~updated-38d-ago

Derived from observable signals (official registry feed and our own credential-free probes); no code audit performed. How it is computed.

Endpoints

remote	auth	reachable	uptime 30d	p50	protocol	last ok
`https://dataset-join-merge.nerolabs.workers.dev/mcp` streamable-http	none	yes	96%	135 ms	2025-06-18	2026-10-20

Tools (2)

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 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_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.

Schemas: list_tools.

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Official server.json

{
  "name": "io.github.Nero-Engine/dataset-join-merge",
  "title": "Dataset Join & Merge",
  "$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
  "remotes": [
    {
      "url": "https://dataset-join-merge.nerolabs.workers.dev/mcp",
      "type": "streamable-http"
    }
  ],
  "version": "0.1.0",
  "repository": {
    "url": "https://github.com/Nero-Engine/dataset-join-merge-mcp",
    "source": "github"
  },
  "websiteUrl": "https://github.com/Nero-Engine/dataset-join-merge-mcp",
  "description": "Join two lists of JSON rows on a key, like SQL or VLOOKUP: left, inner, full, anti joins, union."
}