convex

convex is an MCP server for Claude Code, Codex, Cursor, Gemini CLI, OpenCode from outfitter-dev/carabiner. Its token cost is not measured, scanned A, original, MIT.

A connection tool for Convex Cloud, a hosted service for building applications with a database and backend functions. It starts Convex's local command-line client through the npm package.

In plain words
What is it for?
Use it when a project needs local Convex Cloud access through an MCP server.
Why use it?
It gives the coding agent a defined way to work with a Convex project locally instead of requiring manually configured connection steps.

MCP server for Claude CodeCodexCursorGemini CLIOpenCode

One of 4 entries in .mcp.json — they are configured in one file and arrive together.

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add mcp/outfitter-dev/carabiner/convex
Clone the repo
git clone --depth 1 https://github.com/outfitter-dev/carabiner

Made for: Claude Code, Codex, Cursor, Gemini CLI, OpenCode.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for convex

README.md
[![agentmods](https://agentmods.dev/badge/mcp/outfitter-dev/carabiner/convex.svg)](https://agentmods.dev/mcp/outfitter-dev/carabiner/convex)
Your own site
<a href="https://agentmods.dev/mcp/outfitter-dev/carabiner/convex"><img src="https://agentmods.dev/badge/mcp/outfitter-dev/carabiner/convex.svg" alt="Measured on agentmods" height="20"></a>
Per session not measured What this adds to a session before it is invoked.
When invoked not measured Not applicable: nothing here is loaded into a session.
Security scan A 0 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

convex scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 3d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.mcp.json · 11 lines

What it actually says

{
  "convex": {
    "command": "npx",
    "args": [
      "-y",
      "convex@^1.0.0",
      "mcp",
      "start"
    ]
  }
}
Same file

What else .mcp.json configures

This page is one entry in a file that holds 4. Installing the file brings all of them; each is measured and scanned on its own page.

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 3d ago First seen · 11 lines scan A db59b74099d8

Subscribe to this mod's changes

convex is an MCP server published in the GitHub repository outfitter-dev/carabiner (4 stars, last pushed 7mo ago), licensed MIT. Its token cost is not measured: an MCP server costs its tool schemas, not its config file. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.