> ## Documentation Index
> Fetch the complete documentation index at: https://docs-dev.setoo.work/docs/llms.txt
> Use this file to discover all available pages before exploring further.

# Add contact

> Add a single contact to a contact list

Appends a new contact to the specified contact list.

### Path parameters

<ParamField path="listId" type="string" required>
  The unique UUID of the contact list.
</ParamField>

### Body parameters

<ParamField body="phoneNumber" type="string" required>
  Recipient phone number in E.164 format (e.g. `+919876543210`, `+14155552671`).
</ParamField>

<ParamField body="name" type="string">
  Contact's full name.
</ParamField>

<ParamField body="email" type="string">
  Contact's email address.
</ParamField>

<ParamField body="metadata" type="object">
  Custom dynamic variables accessible during call execution as LLM prompt context (e.g. `{"plan": "premium", "renewal_date": "2026-07-01"}`).
</ParamField>

<CodeGroup>
  ```bash curl theme={null}
  curl -X POST https://api.agentic-os.com/api/v1/contact-lists/33333333-3333-3333-3333-333333333333/contacts \
    -H "Authorization: Bearer $AGENTIC_OS_API_KEY" \
    -H "Content-Type: application/json" \
    -d '{
      "phoneNumber": "+919876543210",
      "name": "Asha Patel",
      "email": "asha.patel@example.com",
      "metadata": {
        "plan": "Enterprise",
        "company": "Acme Corp"
      }
    }'
  ```

  ```python Python theme={null}
  import requests

  response = requests.post(
      "https://api.agentic-os.com/api/v1/contact-lists/33333333-3333-3333-3333-333333333333/contacts",
      headers={
          "Authorization": f"Bearer {API_KEY}",
          "Content-Type": "application/json",
      },
      json={
          "phoneNumber": "+919876543210",
          "name": "Asha Patel",
          "email": "asha.patel@example.com",
          "metadata": {"plan": "Enterprise", "company": "Acme Corp"},
      },
  )
  print(response.json())
  ```

  ```javascript Node theme={null}
  const response = await fetch(
    "https://api.agentic-os.com/api/v1/contact-lists/33333333-3333-3333-3333-333333333333/contacts",
    {
      method: "POST",
      headers: {
        Authorization: `Bearer ${API_KEY}`,
        "Content-Type": "application/json",
      },
      body: JSON.stringify({
        phoneNumber: "+919876543210",
        name: "Asha Patel",
        email: "asha.patel@example.com",
        metadata: { plan: "Enterprise", company: "Acme Corp" },
      }),
    },
  );
  const data = await response.json();
  console.log(data);
  ```
</CodeGroup>

### Response

```json theme={null}
{
  "id": "99999999-8888-7777-6666-555555555555",
  "tenantId": "990e8400-e29b-41d4-a716-446655440000",
  "contactListId": "33333333-3333-3333-3333-333333333333",
  "phoneNumber": "+919876543210",
  "name": "Asha Patel",
  "email": "asha.patel@example.com",
  "metadata": {
    "plan": "Enterprise",
    "company": "Acme Corp",
    "source": "single"
  },
  "createdAt": "2026-06-01T09:10:00.000Z",
  "updatedAt": "2026-06-01T09:10:00.000Z"
}
```