/klaviyo

name: klaviyo
description: Klaviyo email/SMS marketing - profiles, events, flows, segmentation
when-to-use: When integrating Klaviyo for email/SMS marketing
user-invocable: false
effort: medium

Klaviyo E-Commerce Marketing Skill

For integrating Klaviyo email/SMS marketing - customer profiles, event tracking, campaigns, flows, and segmentation.

**Sources:** [Klaviyo API Docs](https://developers.klaviyo.com/en/docs) | [API Reference](https://developers.klaviyo.com/en/reference/api-overview)

---

Why Klaviyo

| Feature | Benefit | |---------|---------| | **E-commerce Native** | Built for online stores, deep integrations | | **Event-Based** | Trigger flows from any customer action | | **Segmentation** | Advanced filtering on behavior + properties | | **Email + SMS** | Unified platform for both channels | | **Analytics** | Revenue attribution per campaign |

---

API Basics

Base URLs

| Type | URL | |------|-----| | Server-side (Private) | `https://a.klaviyo.com/api` | | Client-side (Public) | `https://a.klaviyo.com/client` |

Authentication

// Server-side: Private API Key
const headers = {
  "Authorization": "Klaviyo-API-Key pk_xxxxxxxxxxxxxxxxxxxxxxxx",
  "Content-Type": "application/json",
  "revision": "2024-10-15",  // API version
};

// Client-side: Public API Key (6 characters)
const publicKey = "XXXXXX";  // Company ID
// Use as query param: ?company_id=XXXXXX

API Key Scopes

| Scope | Access | |-------|--------| | Read-only | View data only | | Full | Read + write (default) | | Custom | Specific permissions |

---

Installation

Node.js

npm install klaviyo-api

// lib/klaviyo.ts
import { ApiClient, EventsApi, ProfilesApi, ListsApi } from "klaviyo-api";

const client = new ApiClient();
client.setApiKey(process.env.KLAVIYO_PRIVATE_KEY!);

export const eventsApi = new EventsApi(client);
export const profilesApi = new ProfilesApi(client);
export const listsApi = new ListsApi(client);

Python

pip install klaviyo-api

# lib/klaviyo.py
from klaviyo_api import KlaviyoAPI

klaviyo = KlaviyoAPI(
    api_key=os.environ["KLAVIYO_PRIVATE_KEY"],
    max_delay=60,
    max_retries=3
)

Direct HTTP (Any Language)

// lib/klaviyo.ts
const KLAVIYO_BASE_URL = "https://a.klaviyo.com/api";

async function klaviyoRequest(
  endpoint: string,
  method: "GET" | "POST" | "PATCH" | "DELETE" = "GET",
  body?: object
) {
  const response = await fetch(`${KLAVIYO_BASE_URL}${endpoint}`, {
    method,
    headers: {
      Authorization: `Klaviyo-API-Key ${process.env.KLAVIYO_PRIVATE_KEY}`,
      "Content-Type": "application/json",
      revision: "2024-10-15",
    },
    body: body ? JSON.stringify(body) : undefined,
  });

  if (!response.ok) {
    const error = await response.json();
    throw new Error(`Klaviyo API error: ${JSON.stringify(error)}`);
  }

  return response.json();
}

---

Profiles (Customers)

Create/Update Profile

// Upsert profile (create or update)
async function upsertProfile(data: ProfileInput) {
  return klaviyoRequest("/profiles", "POST", {
    data: {
      type: "profile",
      attributes: {
        email: data.email,
        phone_number: data.phone, // E.164 format: +1234567890
        first_name: data.firstName,
        last_name: data.lastName,
        properties: {
          // Custom properties
          lifetime_value: data.ltv,
          plan: data.plan,
          signup_source: data.source,
        },
        location: {
          city: data.city,
          region: data.state,
          country: data.country,
          zip: data.zip,
        },
      },
    },
  });
}

# Python
def upsert_profile(data):
    return klaviyo.Profiles.create_or_update_profile({
        "data": {
            "type": "profile",
            "attributes": {
                "email": data["email"],
                "first_name": data["first_name"],
                "last_name": data["last_name"],
                "properties": {
                    "plan": data.get("plan"),
                }
            }
        }
    })

Get Profile

async function getProfileByEmail(email: string) {
  const response = await klaviyoRequest(
    `/profiles?filter=equals(email,"${email}")`
  );
  return response.data[0];
}

async function getProfileById(profileId: string) {
  return klaviyoRequest(`/profiles/${profileId}`);
}

Update Profile Properties

async function updateProfileProperties(
  profileId: string,
  properties: Record<string, any>
) {
  return klaviyoRequest(`/profiles/${profileId}`, "PATCH", {
    data: {
      type: "profile",
      id: profileId,
      attributes: {
        properties,
      },
    },
  });
}

// Usage
await updateProfileProperties("profile_id", {
  last_purchase_date: new Date().toISOString(),
  total_orders: 5,
  vip_status: true,
});

---

Events (Tracking)

Track Event (Server-Side)

async function trackEvent(data: EventInput) {
  return klaviyoRequest("/events", "POST", {
    data: {
      type: "event",
      attributes: {
        profile: {
          data: {
            type: "profile",
            attributes: {
              email: data.email,
              // or phone_number, or external_id
            },
          },
        },
        metric: {
          data: {
            type: "metric",
            attributes: {
              name: data.eventName,
            },
          },
        },
        properties: data.properties,
        value: data.value, // For revenue tracking
        unique_id: data.uniqueId, // Deduplication
        time: data.timestamp || new Date().toISOString(),
      },
    },
  });
}

Common E-Commerce Events

// Viewed Product
await trackEvent({
  email: customer.email,
  eventName: "Viewed Product",
  properties: {
    ProductID: product.id,
    ProductName: product.name,
    ProductURL: