langchain-agentphone

LangChain integration for AgentPhone — telephony tools that let LLM agents send SMS messages, make phone calls, and manage phone numbers.

Installation

pip install langchain-agentphone

Setup

Get your API key from agentphone.to and set it as an environment variable:

export AGENTPHONE_API_KEY="your-api-key"

Quick Start

Use all tools

from langchain_agentphone import AgentPhoneToolkit

toolkit = AgentPhoneToolkit()
tools = toolkit.get_tools()

Use specific tools

from langchain_agentphone import AgentPhoneToolkit

toolkit = AgentPhoneToolkit(selected_tools=["send_sms", "list_numbers"])
tools = toolkit.get_tools()

Use individual tools

from langchain_agentphone import AgentPhoneSendSMS

tool = AgentPhoneSendSMS()
result = tool.invoke({
    "number_id": "num_abc123",
    "to_number": "+14155551234",
    "body": "Hello from LangChain!"
})

With a LangChain agent

from langchain_agentphone import AgentPhoneToolkit
from langchain_anthropic import ChatAnthropic
from langgraph.prebuilt import create_react_agent

llm = ChatAnthropic(model="claude-sonnet-4-20250514")
toolkit = AgentPhoneToolkit()
agent = create_react_agent(llm, toolkit.get_tools())

response = agent.invoke({
    "messages": [("user", "Send an SMS from number num_abc123 to +14155551234 saying hello")]
})

Available Tools

API Reference

See the AgentPhone documentation for full API details.