Chroma’s official MCP server: vector search and collection management for RAG workflows.
Nothing to run from here
Dataset Join & Merge is installed from its publisher's own source and answers where it runs, so this marketplace is not in the path of a single call. There is no address here to send one to, and a panel that pretended otherwise would be showing you an answer we made up. Install it and call it from your own client — the Installation tab has the entry for each one.
2
tools declared
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trust score
remote
at its publisher
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calls last 7d
What it does
Join two lists of JSON rows on a key, like SQL or VLOOKUP: left, inner, full, anti joins, union.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user --transport http dataset-join-merge-mcp https://dataset-join-merge.nerolabs.workers.dev/mcp
# 2 — ask your agent for something these tools do
# list_capabilities, join_rows
Dataset Join & Merge costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
NEAll 59 servers
Nero-Engine59 servers
15 categories
Collected from a public index. Nobody has claimed this account, so nothing here was written by its author — claim it if it is yours.
Installation
Where are you running it?
Every route below installs the same thing and ends at the same approval screen. Nothing here runs on your machine and nothing runs on ours: this server answers at its publisher’s own address, and what you install is the connection straight to it.
Claude Codedeclared by this listing
This is a public server: it answers at its publisher’s own address and this marketplace is not in the path. Claude Code registers it in one command; --scope user makes it available in every project. The transport below is http, as the publisher's own manifest declares it.
claude mcp add --scope user --transport http dataset-join-merge-mcp https://dataset-join-merge.nerolabs.workers.dev/mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it answers at its publisher’s own address: this marketplace is not in the path, so there is no key of ours to hold and no card to add.
What it writes
One config entry pointing straight at the publisher’s own address — this marketplace is not in the path, and nothing from this listing executes on your machine.
What you approve
2 tools, with what each one reads, writes and reaches shown before you agree — the same list on every route above. Read the tool surface.
Tool surface
What the model actually sees. Descriptions are diffed on every release — see version history.
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.
No parameter schema on file.
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 o
| Parameter | Type | Required | Notes |
|---|---|---|---|
| leftRows | array | yes | The LEFT table: the main rows you want to keep or enrich. Each row is a JSON object; keys may differ between rows. |
| rightRows | array | yes | The RIGHT table: the lookup rows to pull matching fields from. Each row is a JSON object. |
| leftKeyFields | array | no | The field name(s) on the left rows to match on, for example ["email"], or ["firstName","lastName"] for a composite key. Required for every joinType except union. |
| rightKeyFields | array | no | The matching field name(s) on the right rows, in the same order as leftKeyFields, for example ["contact_email"]. Leave out when the right rows use the same names as the left. |
| joinType | string | no | Which rows to keep. left (default): every left row, enriched where a match exists. inner: matched rows only. right: every right row. full: everything from both sides. leftAnti: left rows with no match |
| keyMatching | string | no | normalized (default): case-insensitive, trimmed, repeated spaces collapsed, 123 matches "123". exact: values must be identical. |
| rightFields | array | no | Only copy these fields from the matching right row, like choosing VLOOKUP return columns. Leave out to copy every right field. |
| onFieldConflict | string | no | When a right field has the same name as a left field. prefixRight (default): keep both, the right one renamed with rightFieldPrefix. keepLeft: ignore the right value. keepRight: overwrite the left val |
| rightFieldPrefix | string | no | Prefix for conflicting right fields when onFieldConflict is prefixRight. Default "right_", so price becomes right_price. |
| multipleMatches | string | no | When one key matches several right rows. all (default): one output row per matching pair, like SQL. first: only the first matching right row, like VLOOKUP, so each left row appears once. |
| includeJoinInfo | boolean | no | On by default: every row gets _joinStatus ("matched", "left_only", "right_only") and _matchCount. Set false for rows with only your own fields. |
Free
$0 forever
- Every tool — any call limit is its publisher’s, not ours
- No card, and mcprush charges nothing for it
- Runs at its publisher’s own address — this marketplace is not in the path
- Nothing to cap, because mcprush bills nothing
What counts against your monthly calls
| Tool | Unit | Calls used | Out of the allowance |
|---|
Nothing here is billable: mcprush charges nothing to install Dataset Join & Merge or to call it, at any volume.
Call allowance · this installenforced at the gateway
Monthly allowance, in calls
—
—
Alert at 80% · then the tool returns a normal MCP error
Used this month: —
—Grade not published
No rule-by-rule report on file for this release
Two independent axes, because powerful and malicious are different questions. The grade is threat only. The capability level is blast radius, and it is never a penalty on the grade — it is priced as one subtract-only term in the score, where you can see it.
This listing is an address its publisher runs, and you connect to it directly — this marketplace is not in the path. The scanner reads packages and public source, and an address is neither: the repository linked on this page is where this record was collected from, not a copy of what the address serves, so it is not graded in its place. So there is no grade — not a withheld one, an unmeasured one.
Release history
This is an address its publisher runs: which release it serves is theirs to choose, so there is nothing here to pin. The history below is for reading; the current release on file is 0.1.0.
0.1.0
undated
latestNo release note was published with this version.
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no reviews yet
Who can review
One review per account, from a signed-in account that does not publish this listing. Nothing else is asked — you can say what you think before you install it. Publishers can reply once per review, and a review can be edited or deleted by whoever wrote it.
Sign in to write one
Any signed-in account that does not publish Dataset Join & Merge can review it, once — before installing it or after. A review from an account that has installed it is marked as one.
No reviews yet
Nobody has reviewed this listing. The rating on the card is the mean of the reviews written here and nothing else, so there is no rating until somebody writes the first — which takes a signed-in account that does not publish it, and nothing else.