---
title: "Send Info Request Sms"
method: POST
path: "/vapi/send-info-request-sms"
tags: ["Vapi"]
---

# Send Info Request Sms

`POST /vapi/send-info-request-sms`

Send an SMS to collect additional information from the caller.

Triggers a two-step SMS flow: first a welcome/opt-in message, then a link
after the caller replies with confirmation.

Vapi custom tool. Expects arguments:
  - phone_number: caller's phone number (E.164 format)
  - first_name: caller's first name (optional)
  - last_name: caller's last name (optional)

## Request body

- VapiCustomToolRequest — Wrapper for Vapi custom tool requests.
  - `message` VapiMessage, required
    - `type` string, required
    - `toolCallList` VapiToolCall[], required
      - `id` string, required
      - `type` string
      - `function` VapiToolCallFunction, required
        - `name` string, required
        - `arguments` object, required
    - `call` VapiCallObject
      - `id` string, required

## Response `200`

Successful Response

- VapiCustomToolResponse — Standard Vapi custom tool response format.
  - `results` VapiToolResult[], required
    - `toolCallId` string, required
    - `result` string, required

## Other responses

- `422` — Validation Error

---

[API](https://skmtc.dev/openintake/apis/fastapi.md) · [All operations](https://skmtc.dev/openintake/apis/fastapi/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/openintake/fastapi/revisions/4a81645b59f6/schema)