How do I connect Twilio SMS to Sim?

A Twilio SMS connection authorizes Sim to use the Twilio actions and triggers you configure. Create an account at sim.ai, add a Twilio SMS block to a workflow, and enter the Twilio credentials requested in the connection settings. After you choose an action or trigger and test the workflow, you can deploy it to process supported Twilio events.

How do Twilio SMS triggers work?

A Twilio SMS trigger starts a Sim workflow when its webhook receives a supported Twilio event. Add a trigger block to the workflow, then configure the generated webhook URL in the relevant Twilio settings for Twilio SMS Received or Twilio Message Status events. The configured webhooks start matching workflows without scheduled polling.

What data does a Twilio SMS trigger provide?

A Twilio SMS trigger provides the fields in the webhook payload that Twilio sends to Sim. Twilio SMS Received events include data about an inbound SMS or MMS, which the workflow can pass to Agent blocks or later steps. Available fields vary by event and payload, so inspect a test event before mapping them.

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Twilio SMS integration for AI agents

Sim connects to Twilio to let an AI agent send SMS updates when an order status changes. Connect Twilio SMS to Sim to send outbound messages and start AI workflows when Twilio reports an inbound SMS, inbound MMS, or message status change.

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Last updated October 14, 2026

What Sim agents can do with Twilio SMS

The Twilio SMS block sends outbound messages. Twilio SMS Received and Twilio Message Status triggers start Sim workflows from supported webhook events.

Category: Communication
Authentication: API key
Tools: 1
Triggers: 2
Documentation: Twilio SMS docs

How to automate Twilio SMS with Sim

Create a free account
Sign up at sim.ai in seconds. No credit card required. Your workspace is ready immediately.
Add a Twilio SMS block
Open your workspace, drag a Twilio SMS block onto the workflow builder, and paste in your Twilio SMS API key.
Configure, connect, and run
Pick the tool you need, wire in an AI agent for reasoning or data transformation, and run. Your Twilio SMS automation is live.

Sim vs. Zapier, Make, and n8n for Twilio SMS

Zapier, Make, and n8n provide Twilio integrations for general-purpose automation. Sim focuses on AI workflows that use Agent blocks to draft or transform messages with order or customer data before a Twilio SMS block sends them. Supported Twilio webhooks can start Sim workflows without scheduled polling. Zapier, Make, or n8n may suit a Twilio workflow that does not require Sim's Agent blocks.

Sim vs. Zapier, Make, and n8n for Twilio SMS
Capability	Sim	Zapier	Make	n8n
Trigger model	Real-time webhook	Polling for new SMS	Instant webhook	Webhook
AI drafting before send	Agent block, built in	Requires a separate AI step or app	Requires a separate AI step or app	Requires a separate AI node
Free to start	Yes	Yes, with a limited free tier	Yes, with a limited free tier	Yes, when self-hosted

Choose Sim when the workflow needs an AI agent to read order or customer context and write the message, rather than relay a fixed template.

Twilio SMS triggers

A supported Twilio SMS webhook starts a Sim workflow when Sim receives the corresponding event. Webhook delivery removes the need for scheduled polling, but Twilio processing and network conditions can affect when Sim receives an event.

Twilio SMS Received

Trigger workflow when an inbound SMS or MMS message is received via Twilio

Twilio Message Status

Trigger workflow when a Twilio message status changes (sent, delivered, failed)

Agent templates

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

Twilio SMS tools

1 Twilio SMS tool available to Sim agents.

Twilio Send SMS

Send text messages to single or multiple recipients using the Twilio API.

Frequently asked questions

Sim's Twilio SMS integration lets an AI agent send SMS messages and receive SMS or MMS messages inside a workflow. You can combine Twilio SMS with Agent blocks and integrations such as AgentPhone and Discord. Combining these blocks lets you generate messages and coordinate responses across supported tools in one workflow.