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Fonoster MCP Server

Official
by fonoster
MIT License
58
6,626
  • Apple
  • Linux

Fonoster MCP Server

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MCP Server for the Fonoster API, enabling MCP clients to interact with Fonoster's telephony services. This module is part of the Fonoster open-source project. For more information about the project, please visit https://github.com/fonoster/fonoster.

Tools

  1. list_numbers
    • Returns a list of numbers from Fonoster in a table format (using markdown)
    • Optional inputs:
      • page_size (number): Maximum number of numbers to return
      • page_token (string): Pagination token for next page
    • Returns: List of numbers with their refs, names, and telUrls
  2. list_applications
    • Lists applications from Fonoster in a table format (using markdown)
    • Optional inputs:
      • page_size (number): Maximum number of applications to return
      • page_token (string): Pagination token for next page
    • Returns: List of applications with their refs, names, endpoints, creation dates, update dates, and types
  3. create_call
    • Creates a call from Fonoster
    • Required inputs:
      • from (string): The number to call from
      • to (string): The number to call to
      • app_ref (string): The reference to the application to use for the call
      • metadata (object): Metadata to be sent to the application
    • Returns: Call creation confirmation with reference ID
  4. create_call_batch
    • Creates a batch of calls from Fonoster
    • Required inputs:
      • from (string): The number to call from
      • to_array (array): The numbers to call to
      • app_ref (string): The reference to the application to use for the call
      • metadata (object): Metadata to be sent to the application
    • Returns: Batch creation confirmation with reference ID

Prompts

  1. create_call_prompt
    • A prompt for creating a call step by step
    • Guides an MCP client through the process of:
      • Asking the user for the number or numbers to call if not already provided
      • Offering a list of available numbers using the list_numbers tool
      • Asking for the application name and finding its reference
      • Creating a call using the create_call or create_call_batch tool depending on the user's request

Setup

Usage with Claude Desktop

Add the following to your claude_desktop_config.json:

If you are logged in to the command-line tool, simply run fonoster mcp:configure --client claude to configure the server.

npx
{ "mcpServers": { "fonoster": { "command": "npx", "args": [ "-y", "@fonoster/mcp" ], "env": { "WORKSPACE_ACCESS_KEY_ID": "your-workspace-access-key-id", "APIKEY_ACCESS_KEY_ID": "your-apikey-access-key-id", "APIKEY_ACCESS_KEY_SECRET": "your-apikey-access-key-secret" } } } }
docker
{ "mcpServers": { "fonoster": { "command": "docker", "args": [ "run", "-i", "--rm", "-e", "WORKSPACE_ACCESS_KEY_ID", "-e", "APIKEY_ACCESS_KEY_ID", "-e", "APIKEY_ACCESS_KEY_SECRET", "fonoster/mcp" ], "env": { "WORKSPACE_ACCESS_KEY_ID": "your-workspace-access-key-id", "APIKEY_ACCESS_KEY_ID": "your-apikey-access-key-id", "APIKEY_ACCESS_KEY_SECRET": "your-apikey-access-key-secret" } } } }

Testing with the MCP Inspector

WORKSPACE_ACCESS_KEY_ID="your-workspace-access-key-id" \ APIKEY_ACCESS_KEY_ID="your-apikey-access-key-id" \ APIKEY_ACCESS_KEY_SECRET="your-apikey-access-key_secret" \ npx @modelcontextprotocol/inspector \ node /path/to/fonoster/mods/mcp/dist/index.js

Troubleshooting

If you encounter authentication errors, verify that:

  1. Your Fonoster credentials are correct
  2. The environment variables are properly set
  3. You have the necessary permissions to access the Fonoster API

Build

Docker build:

docker build -t fonoster/mcp -f Dockerfile .
-
security - not tested
A
license - permissive license
-
quality - not tested

remote-capable server

The server can be hosted and run remotely because it primarily relies on remote services or has no dependency on the local environment.

MCP server that lists applications and phone numbers, and initiates outbound calls via Fonoster.

  1. Tools
    1. Prompts
      1. Setup
        1. Usage with Claude Desktop
        2. Testing with the MCP Inspector
        3. Troubleshooting
      2. Build

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