sinch-gemini-extension

sinch-gemini-extension is a plugin for Gemini CLI from sinch/sinch-plugins. Its token cost is not measured, scanned A, original, Apache-2.0.

A Gemini CLI extension that connects coding-agent commands to Sinch communication services, including messaging, voice, phone verification, fax, numbers, and email.

In plain words
What is it for?
Working with Sinch conversations, SMS, RCS, WhatsApp, calls, verification, fax, phone numbers, and email.
Why use it?
It gives a Gemini CLI session access to Sinch services and their documentation without building each connection itself.

Plugin for Gemini CLI

Written for Gemini CLI: a Gemini CLI extension manifest. Also seen: mentions Gemini CLI.

Good fit Working with Sinch conversations, SMS, RCS, WhatsApp, calls, verification, fax, phone numbers, and email.

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Install with agentmods
npx agentmods add plugins/sinch/sinch-plugins/sinch-gemini-extension
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.

Clone the repo
git clone --depth 1 https://github.com/sinch/sinch-plugins

Made for: Gemini CLI.

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 sinch-gemini-extension

README.md
[![agentmods](https://agentmods.dev/badge/plugins/sinch/sinch-plugins/sinch-gemini-extension/github.svg)](https://agentmods.dev/plugins/sinch/sinch-plugins/sinch-gemini-extension)
Your own site
<a href="https://agentmods.dev/plugins/sinch/sinch-plugins/sinch-gemini-extension"><img src="https://agentmods.dev/badge/plugins/sinch/sinch-plugins/sinch-gemini-extension/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

agentmods 80×15 button for sinch-gemini-extension

Your own site · 80×15
<a href="https://agentmods.dev/plugins/sinch/sinch-plugins/sinch-gemini-extension"><img src="https://agentmods.dev/badge/plugins/sinch/sinch-plugins/sinch-gemini-extension.svg" alt="Reviewed on agentmods" width="80" 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. A grade says what 26 rules found in the file — not that it is safe.
Origin original No closer match found in the catalogue.
Security

Grade A, and why

sinch-gemini-extension 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 2d 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.

plugins/sinch-gemini-extension/gemini-extension.json · 110 lines

How it starts

The opening of the file, as written. The whole thing — 110 lines — stays where its author put it; the contents beside it link to each section on GitHub.

{
  "name": "sinch-gemini-extension",
  "version": "0.3.15",
  "description": "Gemini CLI extension for Sinch: Conversation API (SMS, RCS, WhatsApp), Voice, Verification, Fax, Numbers, 10DLC, Email (Mailgun, Mailjet), and more",
  "author": {
    "name": "Sinch",
    "email": "[email protected]",
    "url": "https://github.com/sinch"
  },
  "license": "Apache-2.0",
  "homepage": "https://sinch.com/",
  "repository": "https://github.com/sinch/sinch-plugins",
  "mcpServers": {
    "sinch": {
      "command": "npx",
      "args": [
        "-y",
        "@sinch/mcp"
      ],
      "env": {
        "CONVERSATION_PROJECT_ID": "${CONVERSATION_PROJECT_ID}",
        "CONVERSATION_KEY_ID": "${CONVERSATION_KEY_ID}",
        "CONVERSATION_KEY_SECRET": "${CONVERSATION_KEY_SECRET}",
        "CONVERSATION_REGION": "${CONVERSATION_REGION}",
        "CONVERSATION_APP_ID": "${CONVERSATION_APP_ID}"
      },
      "timeout": 15000
    },
    "sinch-docs": {
      "httpUrl": "https://developers.sinch.com/mcp"
    }
  },
  "settings": [
    {
      "name": "CONVERSATION_PROJECT_ID",
      "description": "Your Sinch Conversation API Project ID",
      "envVar": "CONVERSATION_PROJECT_ID"
    },
    {
      "name": "CONVERSATION_KEY_ID",
      "description": "Your Sinch Conversation API Key ID",
      "envVar": "CONVERSATION_KEY_ID"
    },
    {
      "name": "CONVERSATION_KEY_SECRET",
      "description": "Your Sinch Conversation API Key Secret",
      "envVar": "CONVERSATION_KEY_SECRET"
    },
    {
      "name": "CONVERSATION_REGION",
      "description": "Your Sinch region (us, eu, or br)",
      "envVar": "CONVERSATION_REGION"
    },
    {
      "name": "CONVERSATION_APP_ID",
      "description": "Your Sinch Conversation API App ID",
      "envVar": "CONVERSATION_APP_ID"
    },
    {
      "name": "VOICE_APPLICATION_KEY",
      "description": "Sinch Voice API Application Key",
      "envVar": "VOICE_APPLICATION_KEY"
    },
    {
      "name": "VOICE_APPLICATION_SECRET",
      "desc

Read the full file on GitHub · 110 lines

Files

What ships with it

60 files beside gemini-extension.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.

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. 2d ago First seen · 110 lines scan A 27da0fc17411

Subscribe to this mod's changes

sinch-gemini-extension is a plugin published in the GitHub repository sinch/sinch-plugins (6 stars, last pushed 2d ago), licensed Apache-2.0. Its token cost is not measured: this kind of file is read by the harness, not the model. 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 2026-09-15.