klaviyo

Q: How do I install klaviyo?

Run npx skills add https://github.com/alinaqi/maggy --skill klaviyo in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/klaviyo/ (personal) or .claude/skills/klaviyo/ (project).

by alinaqiMarketing & SEO

Klaviyo email/SMS marketing - profiles, events, flows, segmentation

Installs: 517
Last 24h: —
Trending rank: —
Security: Not audited

Install

Works with every agent the skills CLI supports.

npx skills add https://github.com/alinaqi/maggy --skill klaviyo

01
Install
Run the command in your project. The CLI asks which agents to install for.
02
Describe the task
Ask your agent for something this skill covers. It loads klaviyo automatically when relevant.
03
Review the result
The agent follows the SKILL.md steps, scripts and references bundled with the skill.

SKILL.md

The instructions your agent reads when the skill is triggered.

Klaviyo E-Commerce Marketing Skill

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

Sources: Klaviyo API Docs | API Reference

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: product.url,
    ImageURL: product.image,
    Price: product.price,
    Categories: product.categories,
  },
});

// Added to Cart
await trackEvent({
  email: customer.email,
  eventName: "Added to Cart",
  properties: {
    ProductID: product.id,
    ProductName: product.name,
    Quantity: quantity,
    Price: product.price,
    CartTotal: cart.total,
    ItemNames: cart.items.map(i => i.name),
  },
  value: product.price * quantity,
});

// Started Checkout
await trackEvent({
  email: customer.email,
  eventName: "Started Checkout",
  properties: {
    CheckoutURL: checkout.url,
    ItemCount: cart.itemCount,
    Categories: cart.categories,
    ItemNames: cart.items.map(i => i.name),
  },
  value: cart.total,
});

// Placed Order
await trackEvent({
  email: customer.email,
  eventName: "Placed Order",
  properties: {
    OrderId: order.id,
    ItemCount: order.itemCount,
    Categories: order.categories,
    ItemNames: order.items.map(i => i.name),
    Items: order.items.map(i => ({
      ProductID: i.productId,
      ProductName: i.name,
      Quantity: i.quantity,
      Price: i.price,
      ImageURL: i.image,
      ProductURL: i.url,
    })),
    BillingAddress: order.billingAddress,
    ShippingAddress: order.shippingAddress,
  },
  value: order.total,
  uniqueId: order.id, // Prevent duplicate orders
});

// Fulfilled Order
await trackEvent({
  email: customer.email,
  eventName: "Fulfilled Order",
  properties: {
    OrderId: order.id,
    TrackingNumber: fulfillment.trackingNumber,
    TrackingURL: fulfillment.trackingUrl,
    Carrier: fulfillment.carrier,
  },
});

// Cancelled Order
await trackEvent({
  email: customer.email,
  eventName: "Cancelled Order",
  properties: {
    OrderId: order.id,
    Reason: cancellation.reason,
  },
  value: -order.total, // Negative value for refunds
});

Client-Side Tracking (JavaScript)

<!-- Add to your site -->
<script async src="https://static.klaviyo.com/onsite/js/klaviyo.js?company_id=XXXXXX"></script>

<script>
  // Identify user
  klaviyo.identify({
    email: "customer@example.com",
    first_name: "John",
    last_name: "Doe",
  });

  // Track event
  klaviyo.track("Viewed Product", {
    ProductID: "prod_123",
    ProductName: "Blue T-Shirt",
    Price: 29.99,
  });

  // Track with value
  klaviyo.track("Added to Cart", {
    ProductID: "prod_123",
    ProductName: "Blue T-Shirt",
    Price: 29.99,
    $value: 29.99,  // Revenue tracking
  });
</script>

Lists & Segments

Add Profile to List

async function addToList(listId: string, emails: string[]) {
  return klaviyoRequest(`/lists/${listId}/relationships/profiles`, "POST", {
    data: emails.map(email => ({
      type: "profile",
      attributes: { email },
    })),
  });
}

// By profile ID
async function addProfileToList(listId: string, profileId: string) {
  return klaviyoRequest(`/lists/${listId}/relationships/profiles`, "POST", {
    data: [{ type: "profile", id: profileId }],
  });
}

Remove from List

async function removeFromList(listId: string, profileId: string) {
  return klaviyoRequest(
    `/lists/${listId}/relationships/profiles`,
    "DELETE",
    {
      data: [{ type: "profile", id: profileId }],
    }
  );
}

Get List Members

async function getListMembers(listId: string, cursor?: string) {
  const params = new URLSearchParams({
    "page[size]": "100",
  });
  if (cursor) {
    params.set("page[cursor]", cursor);
  }

  return klaviyoRequest(`/lists/${listId}/profiles?${params}`);
}

Create List

async function createList(name: string) {
  return klaviyoRequest("/lists", "POST", {
    data: {
      type: "list",
      attributes: { name },
    },
  });
}

Campaigns

Get Campaigns

async function getCampaigns(status?: "draft" | "scheduled" | "sent") {
  const params = new URLSearchParams();
  if (status) {
    params.set("filter", `equals(status,"${status}")`);
  }

  return klaviyoRequest(`/campaigns?${params}`);
}

Get Campaign Performance

async function getCampaignMetrics(campaignId: string) {
  return klaviyoRequest(
    `/campaign-recipient-estimations/${campaignId}`,
    "GET"
  );
}

Flows (Automations)

Get Flows

async function getFlows() {
  return klaviyoRequest("/flows");
}

async function getFlowById(flowId: string) {
  return klaviyoRequest(`/flows/${flowId}`);
}

Common Flow Triggers

Flow Type	Trigger Event
Welcome Series	Added to List
Abandoned Cart	Added to Cart + No Purchase
Browse Abandon	Viewed Product + No Cart
Post-Purchase	Placed Order
Winback	No Order in X Days
Review Request	Fulfilled Order

Webhooks

Create Webhook

async function createWebhook(data: WebhookInput) {
  return klaviyoRequest("/webhooks", "POST", {
    data: {
      type: "webhook",
      attributes: {
        name: data.name,
        endpoint_url: data.url,
        secret_key: data.secret,
        topics: data.topics, // e.g., ["profile.created", "event.created"]
      },
    },
  });
}

Webhook Topics

Topic	Trigger
`profile.created`	New profile created
`profile.updated`	Profile properties changed
`profile.merged`	Profiles merged
`event.created`	New event tracked
`list.member.added`	Profile added to list
`list.member.removed`	Profile removed from list

Verify Webhook Signature

import crypto from "crypto";

function verifyKlaviyoWebhook(
  payload: string,
  signature: string,
  secret: string
): boolean {
  const expectedSignature = crypto
    .createHmac("sha256", secret)
    .update(payload)
    .digest("base64");

  return crypto.timingSafeEqual(
    Buffer.from(signature),
    Buffer.from(expectedSignature)
  );
}

// Express handler
app.post("/webhooks/klaviyo", (req, res) => {
  const signature = req.headers["klaviyo-webhook-signature"] as string;

  if (!verifyKlaviyoWebhook(JSON.stringify(req.body), signature, WEBHOOK_SECRET)) {
    return res.status(401).json({ error: "Invalid signature" });
  }

  const { type, data } = req.body;

  switch (type) {
    case "profile.created":
      handleNewProfile(data);
      break;
    case "event.created":
      handleNewEvent(data);
      break;
  }

  res.status(200).json({ received: true });
});

Rate Limits

Window	Limit
Burst	75 requests/second
Steady	700 requests/minute

Handle Rate Limiting

async function klaviyoRequestWithRetry(
  endpoint: string,
  method: "GET" | "POST" | "PATCH" | "DELETE" = "GET",
  body?: object,
  retries = 3
): Promise<any> {
  for (let attempt = 0; attempt < retries; attempt++) {
    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.status === 429) {
      const retryAfter = parseInt(response.headers.get("Retry-After") || "5");
      await new Promise(r => setTimeout(r, retryAfter * 1000));
      continue;
    }

    if (!response.ok) {
      throw new Error(`Klaviyo error: ${response.status}`);
    }

    return response.json();
  }

  throw new Error("Max retries exceeded");
}

Pagination

async function getAllProfiles() {
  const profiles = [];
  let cursor: string | undefined;

  do {
    const params = new URLSearchParams({ "page[size]": "100" });
    if (cursor) {
      params.set("page[cursor]", cursor);
    }

    const response = await klaviyoRequest(`/profiles?${params}`);
    profiles.push(...response.data);

    cursor = response.links?.next
      ? new URL(response.links.next).searchParams.get("page[cursor]")
      : undefined;
  } while (cursor);

  return profiles;
}

Filtering & Sorting

// Filter by date
const recentEvents = await klaviyoRequest(
  `/events?filter=greater-than(datetime,2024-01-01T00:00:00Z)`
);

// Filter by property
const vipProfiles = await klaviyoRequest(
  `/profiles?filter=equals(properties.vip_status,true)`
);

// Multiple filters (AND)
const filtered = await klaviyoRequest(
  `/profiles?filter=and(equals(properties.plan,"pro"),greater-than(properties.ltv,1000))`
);

// Sorting
const sorted = await klaviyoRequest(
  `/profiles?sort=-created`  // Descending by created date
);

// Sparse fieldsets (only return specific fields)
const sparse = await klaviyoRequest(
  `/profiles?fields[profile]=email,first_name,properties`
);

Integration Patterns

E-Commerce Order Sync

// After order is placed
async function syncOrderToKlaviyo(order: Order) {
  // 1. Upsert customer profile
  await upsertProfile({
    email: order.customerEmail,
    firstName: order.customerFirstName,
    lastName: order.customerLastName,
    phone: order.customerPhone,
  });

  // 2. Update lifetime metrics
  await updateProfileProperties(
    await getProfileIdByEmail(order.customerEmail),
    {
      last_order_date: new Date().toISOString(),
      total_orders: order.customerOrderCount,
      lifetime_value: order.customerLifetimeValue,
    }
  );

  // 3. Track order event
  await trackEvent({
    email: order.customerEmail,
    eventName: "Placed Order",
    properties: {
      OrderId: order.id,
      Items: order.items,
      // ... other properties
    },
    value: order.total,
    uniqueId: order.id,
  });
}

Subscription Status Sync

// When subscription changes
async function syncSubscriptionStatus(user: User, status: string) {
  await updateProfileProperties(user.klaviyoProfileId, {
    subscription_status: status,
    subscription_plan: user.plan,
    subscription_updated_at: new Date().toISOString(),
  });

  await trackEvent({
    email: user.email,
    eventName: `Subscription ${status}`,
    properties: {
      plan: user.plan,
      mrr: user.mrr,
    },
    value: status === "cancelled" ? -user.mrr : user.mrr,
  });
}

Environment Variables

# .env
KLAVIYO_PRIVATE_KEY=pk_xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
KLAVIYO_PUBLIC_KEY=XXXXXX
KLAVIYO_WEBHOOK_SECRET=your_webhook_secret

Add to credentials.md:

'KLAVIYO_PRIVATE_KEY': r'pk_[a-f0-9]{32}',
'KLAVIYO_PUBLIC_KEY': r'[A-Z0-9]{6}',

Checklist

Setup

Klaviyo account created
Private API key generated
Public API key noted (company ID)
API revision set in headers

Integration

Profile sync on signup/update
Key events tracked (view, cart, order)
Order events include Items array
Revenue tracked with $value
Unique IDs for deduplication

Testing

Anti-Patterns

Missing email/phone - Every profile needs at least one identifier
Duplicate events - Use unique_id for orders/transactions
Missing Items array - Required for product recommendations
Client-side only - Server-side tracking is more reliable
Ignoring rate limits - Implement exponential backoff
Hardcoded API keys - Use environment variables
Missing revenue tracking - Include $value for ROI attribution

FAQ

What does the klaviyo skill do?

Klaviyo email/SMS marketing - profiles, events, flows, segmentation

How do I install klaviyo?

Run npx skills add https://github.com/alinaqi/maggy --skill klaviyo in your project. The skills CLI detects the agents you use and copies the skill into the right folder. For Claude Code you can also place the skill folder at ~/.claude/skills/klaviyo/ (personal) or .claude/skills/klaviyo/ (project).

Which AI agents can use klaviyo?

Any agent that supports the open Agent Skills format (a folder with a SKILL.md file), including Claude Code, Codex, Cursor, GitHub Copilot, Gemini CLI, Windsurf, Cline, OpenCode and more.

Is klaviyo safe to install?

No partner security audit is available yet. Skills can run commands and scripts, so read the SKILL.md and any bundled files before installing.

Who maintains klaviyo?

It is published by alinaqi in alinaqi/maggy. It has 517 recorded installs.

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klaviyo

Install

Install

Describe the task

Review the result

SKILL.md

Klaviyo E-Commerce Marketing Skill

Why Klaviyo

API Basics

Base URLs

Authentication

API Key Scopes

Installation

Node.js

Python

Direct HTTP (Any Language)

Profiles (Customers)

Create/Update Profile

Get Profile

Update Profile Properties

Events (Tracking)

Track Event (Server-Side)

Common E-Commerce Events

Client-Side Tracking (JavaScript)

Lists & Segments

Add Profile to List

Remove from List

Get List Members

Create List

Campaigns

Get Campaigns

Get Campaign Performance

Flows (Automations)

Get Flows

Common Flow Triggers

Webhooks

Create Webhook

Webhook Topics

Verify Webhook Signature

Rate Limits

Handle Rate Limiting

Pagination

Filtering & Sorting

Integration Patterns

E-Commerce Order Sync

Subscription Status Sync

Environment Variables

Checklist

Setup

Integration

Testing

Anti-Patterns

FAQ

More from alinaqi/maggy

Popular marketing & seo skills