Chroma’s official MCP server: vector search and collection management for RAG workflows.
Nothing to run from here
Postgres and REST twins 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.
93/100
trust score
20
downloads a day
local
runs on your machine
424
downloads in 30d
What it does
Twins for Postgres and REST: declared-subset Postgres, spec-defined REST, migration proof.
Quickstart
# 1 — add it to Claude Code
claude mcp add --scope user postgres-and-rest-twins-mcp '--' npx -y @cmdrvl/twinning-mcp
# 2 — ask your agent for something these tools do
# twin_doctor, twin_list, twin_pair_proof and 4 more
Postgres and REST twins costs nothing on mcprush: there is no plan to choose here, no cap to set and nothing mcprush can bill you for.
Publishernot claimed
CMAll 2 servers
cmdrvl2 servers
2 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. This one runs on your machine: your client starts Postgres and REST twins as a process under your own user, with your files and your network, so the tool surface below is what it can do to your computer rather than to a server somewhere else. Its scan result is on the Security tab — read the surface before you approve it.
Claude Codedeclared by this listing
This is a public server: you run it yourself and this marketplace is not in the path. You need Node.js — the current LTS (24) is the safe choice; npx comes with it. Claude Code registers it in one command; --scope user makes it available in every project. The '--' is in quotes so that PowerShell passes it on.
claude mcp add --scope user postgres-and-rest-twins-mcp '--' npx -y @cmdrvl/twinning-mcpReconnect, or start a new session, and the tools appear in the model’s tool list.
Free on mcprush, and it runs from its publisher’s own package: 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 your client uses to start the process locally. A local server runs with your file system and your network, which is why it is priced without metering.
What you approve
7 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.
Read from its source code. A server that builds its tool list when it starts can list more tools than this.
Check the twinning binary and configured work directory for the declared-subset Postgres and spec-based REST twin server.
No parameter schema on file.
List retained Postgres and spec-based REST twins managed for the declared client subset.
No parameter schema on file.
Compare declared-subset Postgres-to-Postgres committed-state snapshots by replaying point lookups, filtered scans and aggregate counts from the supplied query file. Join cases are reported as skip. Oracle/TNS fidelity is deferred.
No parameter schema on file.
Read a bounded report for a stopped declared-subset Postgres or spec-based REST twin. Opt-in refused Postgres SQL text appears only here and can contain SQL literals.
No parameter schema on file.
Create a seed contract for a schema supported by the declared Postgres subset.
No parameter schema on file.
Start a Postgres twin for the declared client subset or a REST twin built from an OpenAPI spec; the REST twin refuses requests the spec does not define. Optional Postgres declaration_path sets catalog identity. Optional snapshot_path is written only when the twin stops. Opt-in refused SQL capture…
| Parameter | Type | Required | Notes |
|---|---|---|---|
| kind | string | yes | — |
| schema_path | string | no | Path to a schema within the declared Postgres subset. |
| spec_path | string | no | Path to an OpenAPI YAML or JSON spec inside the workdir; external references are refused. |
| verify_path | string | no | Optional verify artifact path for Postgres. |
| seed_path | string | no | Optional seed file path for Postgres. |
| restore_path | string | no | Optional snapshot path to restore for Postgres. |
| snapshot_path | string | no | Optional Postgres snapshot output path. The snapshot appears only after the twin stops. |
| declaration_path | string | no | Optional Postgres catalog declaration path. |
| auth_mode | string | no | REST authentication behavior. |
| server_variables | object | no | OpenAPI server variables passed as repeated --server-variable options. |
| capture_refused_statements | boolean | no | Postgres only. Store refused SQL text in the local trace file and expose bounded samples in twin_report. Text may contain SQL literals; bind values are never captured. |
| ttl_minutes | integer | no | — |
Stop a managed declared-subset Postgres or REST twin and return its run summary.
No parameter schema on file.
Free
$0 forever
- Every tool, no call limit
- No card, and mcprush charges nothing for it
- Source published under MIT
- Runs on your machine — nothing of it reaches our gateway
- 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 Postgres and REST twins 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: —
ATrust score 93 / 100
Release 0.7.1 · scanned 3 Nov 2026
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.
Threat score100
Client score93
Findings1 threat · 0 capability
Capabilityhigh
Coveragesource
Verificationrepo
Surface digest9edf5bd34c367f20867d50e0be99b84a1d44c75f291f8e4a43be1d18f9b3e5b0
Score vectorthreat 100 → client 93
| Term | Level | What it prices | Points |
|---|---|---|---|
| capability-exposure | high | capability blast radius (high) — client exposure if the model is manipulated | −6 |
| verification-discount | repo | publisher verification (public source) — no provenance, but the source is public and inspectable | −1 |
| coverage-honesty | source | inspection depth (source) — how much of the target the scan could see | −0 |
score = clamp(round(threatScore − E_cap − E_ver − E_cov), 0, 100). No model, no opinion, no network call at scoring time: the same methodology version against the same bytes always produces this number, and every line above is a field of the report rather than a summary of it.
What the scan could actually read
A grade is only as meaningful as its coverage, so the scanner publishes its own depth before it publishes its result.
Tool surfacenot available
Implementation sourceread
Package metadataread
Live transportnot available
No tools were enumerated, so prompt-injection, capability and toxic-flow analysis had no tool surface to inspect. To grade a package’s real runtime tools, scan the running server: --command "npx -y <package>".
Capability — what it could do if the model were manipulated
Tags derived from each tool’s schema and the implementation, not from what the tool calls itself. high is the level these add up to.
| Tool | Capability tags | Why the tag was assigned |
|---|---|---|
| No per-tool rows for this release — see the note below. | ||
can execute shell commands or code
Toxic-flow graph
The lethal trifecta, checked as a graph rather than as a checklist: untrusted input, a sensitive source and an external sink have to meet before there is a path worth worrying about.
The public result for this release does not print the flow graph, so there is nothing to show here. That is not the same as "no paths were found": what the scan did read is above, under coverage.
Supply chain and provenance
Integrityfirst-seen
Surface digest9edf5bd34c367f20
Scanned2026-11-03
This is the first scan of this surface here, so there is nothing yet to compare it against.
Every result on this tab comes from one deterministic pass over the published package — offline, rule by rule, and auditable line by line above. Same methodology version, same bytes, same score.
Release history
Always latest — the install command names no version, so it installs the newest release when it runs; the current release on file is 0.7.1. Pin a release below and the command asks for exactly that one.
0.7.1
undated
latestNo release note was published with this version.
—
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 Postgres and REST twins 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.