Call single phone number

Trigger AI Phone Call

Initiate an AI-powered phone call by providing a phone number.

The API automatically creates a contact record if one doesn’t exist, or you can reference an existing contact.

# Basic call - phone number only
# (auto-creates contact with only the phone number)
curl --request POST \
--url https://api.dev.uselevers.com/api-service/v1/ai/phone-calls/action/call \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "numberToCall": "+96612341234",
  "metadata": {
    "project_id": "proj_123",
    "extra_id": "custom_id_456"
  }
}'

# With contact details (auto-creates contact with more information)
curl --request POST \
--url https://api.dev.uselevers.com/api-service/v1/ai/phone-calls/action/call \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "numberToCall": "+96612341234",
  "firstName": "John",
  "lastName": "Doe",
  "email": "john.doe@example.com",
  "metadata": {
    "project_id": "proj_123",
    "extra_id": "custom_id_456"
  }
}'

# Update existing contact details if found
curl --request POST \
--url https://api.dev.uselevers.com/api-service/v1/ai/phone-calls/action/call \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "numberToCall": "+96612341234",
  "firstName": "John",
  "lastName": "Doe",
  "email": "john.doe@example.com",
  "updateExisting": true,
  "metadata": {
    "project_id": "proj_123",
    "extra_id": "custom_id_456"
  }
}'

# Link to an existing contact by UUID
curl --request POST \
--url https://api.dev.uselevers.com/api-service/v1/ai/phone-calls/action/call \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "numberToCall": "+96612341234",
  "contactUuid": "9bfa828a-3c2d-430c-bdc7-f74d90334524",
  "metadata": {
    "project_id": "proj_123",
    "extra_id": "custom_id_456"
  }
}'

# With custom AI settings template
curl --request POST \
--url https://api.dev.uselevers.com/api-service/v1/ai/phone-calls/action/call \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "numberToCall": "+96612341234",
  "firstName": "John",
  "lastName": "Doe",
  "aiSettingsTemplateId": "template-uuid-here",
  "metadata": {
    "project_id": "proj_123",
    "extra_id": "custom_id_456"
  }
}'

# With prompt tags for template variable substitution
curl --request POST \
--url https://api.dev.uselevers.com/api-service/v1/ai/phone-calls/action/call \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '{
  "numberToCall": "+96612341234",
  "firstName": "John",
  "aiSettingsTemplateId": "template-uuid-here",
  "promptTags": {
    "amount": "$500.00",
    "due_date": "January 15, 2026"
  }
}'

Request Fields

numberToCall

string

required

Phone number to call. We automatically search for any existing contact with this number to avoid creating duplicates.

firstName

string

Contact’s first name (used when creating or updating the contact)

lastName

string

Contact’s last name (used when creating or updating the contact)

string

Contact’s email address (used when creating or updating the contact)

contactUuid

string (UUID)

Explicitly link the call to a specific contact. This is useful when calling a contact at a different number than their default one—the numberToCall is still dialed, but the call is associated with the specified contact. If the UUID doesn’t exist, we’ll fall back to searching by phone number and create a new contact.

aiSettingsTemplateId

string (UUID)

Customize how the AI behaves during the call using your prompt templates from the Levers app. If not specified, the default template will be used.

metadata

object

Optional field for sending extra payload data with the call. This metadata will be included in webhook responses as requestMetadata, allowing you to track additional context like project_id, extra_id, or any custom key-value pairs relevant to your application.

Hide Example

{
  "project_id": "proj_123",
  "extra_id": "custom_id_456"
}

promptTags

object

Optional key-value pairs for template variable substitution in the system prompt. Each key maps to a placeholder in your prompt template (e.g., {{amount}}), and the value replaces it before the call starts. Only string values are supported.This is separate from metadata — metadata is stored on the call log and included in webhooks, while promptTags is consumed at call time to populate the system prompt.

Hide How template substitution works

Your system prompt template uses double-curly-brace placeholders (e.g., {{amount}}):

You are a collections agent. The customer owes {{amount}} due by {{due_date}}.
Be professional and offer payment plan options if the customer cannot pay in full.

With this request:

{
  "promptTags": {
    "amount": "$500.00",
    "due_date": "January 15, 2026"
  }
}

The AI receives:

You are a collections agent. The customer owes $500.00 due by January 15, 2026.
Be professional and offer payment plan options if the customer cannot pay in full.

Show Using promptTags for guardrails

You can also inject additional instructions dynamically:

{
  "promptTags": {
    "amount": "$1,200.00",
    "due_date": "February 1, 2026",
    "guardrail": "Do not mention late fees. If the customer asks about penalties, redirect to their account portal."
  }
}

updateExisting

boolean

default:"false"

When true, if an existing contact is found with the provided numberToCall, their firstName, lastName, and email will be updated with the provided values. If no contact is found with that phone number, a new contact will be created with the provided details.

​Trigger AI Phone Call

​Request Fields

Trigger AI Phone Call

Request Fields