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Back to Integrations

AgentPhone

Provision numbers, send SMS and iMessage, and place voice calls with AgentPhone

AgentPhone is a Communicationintegration for Sim, the AI workspace where teams build and deploy AI agents. Sim's AgentPhone integration provides 22 AgentPhone tools that AI agents can use inside Sim's visual workflow builder. AgentPhone connects with an API key. Free to start at sim.ai.

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Last updated June 12, 2026

Overview

Give your workflow a phone. Provision SMS- and voice-enabled numbers, send messages and tapback reactions, place outbound voice calls, manage conversations and contacts, and track usage — all through a single AgentPhone API key.

How to automate AgentPhone with Sim

  1. 01

    Create a free account

    Sign up at sim.ai in seconds. No credit card required. Your workspace is ready immediately.

  2. 02

    Add an AgentPhone block

    Open your workspace, drag an AgentPhone block onto the workflow builder, and paste in your AgentPhone API key.

  3. 03

    Configure, connect, and run

    Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your AgentPhone automation is live.

Agent templates

Ready-to-use templates featuring AgentPhone. Click any to build it instantly.

Supported tools

22 AgentPhone tools available in Sim

Create Number

Provision a new SMS- and voice-enabled phone number

List Numbers

List all phone numbers provisioned for this AgentPhone account

Release Number

Release (delete) a phone number. This action is irreversible.

Get Number Messages

Fetch messages received on a specific phone number

Create Call

Initiate an outbound voice call from an AgentPhone agent

List Calls

List voice calls for this AgentPhone account

Get Call

Fetch a call and its full transcript

Get Call Transcript

Get the full ordered transcript for a call

List Conversations

List conversations (message threads) for this AgentPhone account

Get Conversation

Get a conversation along with its recent messages

Update Conversation

Update conversation metadata (stored state). Pass null to clear existing metadata.

Get Conversation Messages

Get paginated messages for a conversation

Send Message

Send an outbound SMS or iMessage from an AgentPhone agent

React to Message

Send an iMessage tapback reaction to a message (iMessage only)

Create Contact

Create a new contact in AgentPhone

List Contacts

List contacts for this AgentPhone account

Get Contact

Fetch a single contact by ID

Update Contact

Update a contact

Delete Contact

Delete a contact by ID

Get Usage

Retrieve current usage statistics for the AgentPhone account

Get Daily Usage

Get a daily breakdown of usage (messages, calls, webhooks) for the last N days

Get Monthly Usage

Get monthly usage aggregation (messages, calls, webhooks) for the last N months

Frequently asked questions

Sim's AgentPhone integration adds 22 AgentPhone tools to the AI agents you build in Sim's visual workflow builder — no code required. Provision numbers, send SMS and iMessage, and place voice calls with AgentPhone. Teams often pair AgentPhone with Rippling and Linear in the same agent.

You can create Number, list Numbers, release Number, get Number Messages, and create Call with AgentPhone in Sim, plus 17 more AgentPhone tools listed on this page. Each runs as a tool inside an AI agent block, so an agent can chain AgentPhone with services like Rippling and Linear and apply LLM reasoning between steps.

Connecting AgentPhone takes about five minutes: (1) Create a free account at sim.ai. (2) Create an agent in your workspace. (3) Drag an AgentPhone block onto the workflow builder. (4) Paste your AgentPhone API key to authenticate — you can find it in your AgentPhone account settings. (5) Pick a tool such as "Create Number", wire up its inputs, and click Run — your agent is live.

Add an AgentPhone block to your agent and select "Create Number" as the tool. Provision a new SMS- and voice-enabled phone number. Fill in the required fields — inputs can reference outputs from earlier steps, such as text generated by an AI block or data fetched from another integration. No code is required.

Rippling

Manage workers, departments, custom objects, and company data in Rippling

Linear

Interact with Linear issues, projects, and more

SAP Concur

Manage expense reports, travel requests, cash advances, and more in SAP Concur

GitHub

Interact with GitHub or trigger workflows from GitHub events

Sim

Start automating AgentPhone today

Build your first AI agent with AgentPhone in minutes. Connect to every tool your team uses. Free to start, no credit card required.