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Smallest MCP Server

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by smallest-inc
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TypeScript
Remote

Smallest MCP Server

MCP server for the Smallest AI platform. Manage agents, debug calls, view analytics — directly from your IDE.

Quick start

Option A: npm (recommended)

Requires Node.js 18+. Add this to your MCP config (~/.cursor/mcp.json for Cursor, claude_desktop_config.json for Claude Desktop):

{
  "mcpServers": {
    "smallest": {
      "command": "npx",
      "args": ["-y", "@developer-smallestai/smallest-mcp-server"],
      "env": {
        "ATOMS_API_KEY": "sk_your_key_here"
      }
    }
  }
}

Auto-updates to the latest version every time your editor restarts.

Option B: One-line installer (no dependencies)

Mac / Linux:

curl -fsSL https://raw.githubusercontent.com/smallest-inc/mcp-server/main/install.sh | bash

Windows (PowerShell):

irm https://raw.githubusercontent.com/smallest-inc/mcp-server/main/install.ps1 | iex

Downloads a standalone binary, prompts for your API key, and configures Cursor + Claude Desktop automatically. Re-run to update.

Option C: One prompt

Open a chat in Cursor or Claude Desktop and type:

Set up the Smallest MCP server for me.
The npm package is @developer-smallestai/smallest-mcp-server.
My API key is: sk_paste_your_key_here

Verify

Reload your editor, then type: "List all my agents"

Available tools

Read

Tool

Description

list_calls

Search and list calls with filters for status, type, date range, agent, phone number

debug_call

Get detailed info about a single call — status, transcript, errors, analytics, latency

get_agents

List agents with their configuration, voice, LLM model, and call stats

get_agent

Get full details for a single agent

get_agent_prompt

Read an agent's current system prompt and tools

get_usage_stats

Usage statistics — total calls, duration, costs, status breakdown

get_campaigns

List outbound calling campaigns with status and progress

get_phone_numbers

List phone numbers owned by your organization

get_voices

List available voices with gender, language, and model filters

Write

Tool

Description

create_agent

Create a new AI voice agent

update_agent_prompt

Update an agent's system prompt / instructions

update_agent_config

Update agent settings — name, language, voice, first message, etc.

delete_agent

Archive (soft-delete) or unarchive an agent

publish_draft

Publish or discard a draft on a versioned agent

Act

Tool

Description

make_call

Initiate an outbound phone call using a specific agent

Resources

Resource

URI

Description

Platform Overview

atoms://docs/platform-overview

Key concepts, call types, statuses, and cost breakdown

Environment variables

Variable

Required

Description

ATOMS_API_KEY

Yes

Your Smallest AI API key

Development

npm install
npm run dev    # run with tsx
npm run build  # bundle to dist/

Releases

Merging to main automatically publishes a new version to npm and GitHub Releases.

Version bumps are automatic based on commit messages:

Commit message contains

Bump

Example

new tool, new resource, add tool, add resource

minor (0.2.0 → 0.3.0)

feat: add new tool for knowledge bases

BREAKING CHANGE or feat!:

major (0.2.0 → 1.0.0)

feat!: redesign agent config schema

Anything else

patch (0.2.0 → 0.2.1)

fix: handle empty call logs

License

MIT

Install Server
A
license - permissive license
A
quality
B
maintenance

How are these scores calculated?

Maintenance

–Maintainers
–Response time
4dRelease cycle
19Releases (12mo)

Resources

Unclaimed servers have limited discoverability.

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If you are the server author, to access and configure the admin panel.

Tools

View all tools

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