dial-langchain 0.16.0

Official Dial LangChain tools — phone numbers, SMS, WhatsApp, and voice calls for AI agents

dial-langchain

Official LangChain tools for Dial — phone numbers, SMS, WhatsApp, and AI voice calls for AI agents.

Install

pip install dial-langchain
# or
uv add dial-langchain

This pulls in dial-sdk and langchain-core automatically. Requires Python 3.11+.

Quickstart

Build one DialClient, hand it to DialToolkit, and call get_tools() to give an agent the full set — no per-tool imports. Every tool shares that one client (a single connection pool):

from dial_sdk import DialClient, DialConfig
from dial_langchain import DialToolkit
from langchain.chat_models import init_chat_model
from langgraph.prebuilt import create_react_agent

model = init_chat_model("claude-sonnet-4-6", model_provider="anthropic")

dial = DialClient(DialConfig(api_key="sk_live_..."))
toolkit = DialToolkit(client=dial)
agent = create_react_agent(model, toolkit.get_tools())

DialToolkit is a standard LangChain BaseToolkit, so get_tools() works anywhere a list of tools is expected. DialConfig also takes an optional base_url (defaults to https://api.getdial.ai; override it for local or self-hosted setups).

Pick individual tools

When you only want a subset, import the tools directly and pass them the same client. Each Dial capability is a LangChain BaseTool:

from dial_sdk import DialClient, DialConfig
from dial_langchain import (
    ListNumbersTool,
    SendMessageTool,
    MakeCallTool,
    ListCallsTool,
    GetCallTool,
    WaitForMessageTool,
)

dial = DialClient(DialConfig(api_key="sk_live_..."))
tools = [
    ListNumbersTool(client=dial),
    SendMessageTool(client=dial),
    MakeCallTool(client=dial),
]

# Drop into any LangChain agent:
from langchain.agents import create_react_agent
agent = create_react_agent(model, tools, prompt)

The tools are async — LangChain calls them via ainvoke.

Available tools

Tool	Tool name (for the LLM)
ListNumbersTool	list_numbers
PurchaseNumberTool	purchase_number
SetNumberPropertiesTool	set_number_properties
ListMessagesTool	list_messages
SendMessageTool	send_message
ReplyToMessageTool	reply_to_message
ListCallsTool	list_calls
MakeCallTool	make_call
GetCallTool	get_call
WaitForMessageTool	wait_for_message

Each tool wraps the corresponding dial-sdk call under the hood. DialToolkit.get_tools() returns all of them.

Related

• dial-sdk — the underlying async Python SDK.
• Documentation