Klaviyo Catalogs (BYOK)

Klaviyo Catalogs (BYOK) — connector documentation

• MCP endpoint: https://byok-klaviyo-catalogs.connectorbay.com/mcp
• REST API: POST https://byok-klaviyo-catalogs.connectorbay.com/v1/tools/{tool_name}, described by the OpenAPI 3.1 spec at https://byok-klaviyo-catalogs.connectorbay.com/openapi.json
• Transport: Streamable HTTP, stateless, MCP specification 2025-06-18 or later
• Authentication: your own Klaviyo Catalogs private API key (starts with pk_), sent in the X-Upstream-Key header of every request (never stored, logged or cached)
• Health: https://byok-klaviyo-catalogs.connectorbay.com/health · Tool schemas: https://byok-klaviyo-catalogs.connectorbay.com/tools.json
• Publisher: Unify Dynamics LLC · connectorbay.com/byok-klaviyo-catalogs · agent@connectorbay.com

What Klaviyo Catalogs (BYOK) is for

Klaviyo Catalogs (BYOK) lets an AI assistant read your own Klaviyo Catalogs data through the Klaviyo Catalogs API with a key you supply (private API key (starts with pk_)). Read-only: 8 tools (list_catalog_items, get_catalog_item, list_item_variants, list_catalog_variants, get_catalog_variant, list_catalog_categories, get_catalog_category, list_category_items). The BYOK key travels with each request, is used for that one call only and is never stored, logged or cached; it is only ever sent to a.klaviyo.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Klaviyo Catalogs. Klaviyo Catalogs and its logos are trademarks of their owners and are used only to say which service the connector works with.

Ask your assistant things like:

• "Which products are in my Klaviyo catalog?"
• "What is the price of the Klaviyo catalog item SKU-1?"
• "What variants and stock levels does the Klaviyo item SKU-1 have?"
• "Which Klaviyo catalog variants have the SKU SKU-1-M?"
• "How many units of the Klaviyo variant SKU-1-M are in stock?"
• "Which product categories exist in my Klaviyo catalog?"

What it does

• list_catalog_items: List catalog items (products) with title, description, price, URL, published flag and dates, at most 100 per page. Needs the catalogs:read scope.
• get_catalog_item: Get one catalog item by ID with title, description, price, URL, published flag and dates. Needs the catalogs:read scope.
• list_item_variants: List the variants of one catalog item with SKU, price, inventory quantity and policy and published flag, at most 100 per page. inventory_policy is 0 (do not track), 1 (track and hide when out of stock) or 2 (track and keep visible).
• list_catalog_variants: List variants of all catalog items with SKU, price, inventory quantity and policy and published flag, at most 100 per page. inventory_policy is 0 (do not track), 1 (track and hide when out of stock) or 2 (track and keep visible).
• get_catalog_variant: Get one catalog variant by ID with SKU, price, inventory quantity and policy, URL, published flag and dates. inventory_policy is 0 (do not track), 1 (track and hide when out of stock) or 2 (track and keep visible).
• list_catalog_categories: List catalog categories with name and last update time, at most 100 per page. Needs the catalogs:read scope.
• get_catalog_category: Get one catalog category by ID with its name and last update time.
• list_category_items: List the catalog items in one category with title, description, price, URL, published flag and dates, at most 100 per page.

BYOK key

You bring your own Klaviyo Catalogs private API key (starts with pk_) (https://developers.klaviyo.com/en/docs/authenticate_). Your assistant sends it in the X-Upstream-Key header with each request. ConnectorBay uses it for that one call only: it is never stored, logged or cached, never shown in an answer, and it is only sent to a.klaviyo.com over https, with no redirects followed. Create a key with the fewest permissions the tools need (read-only if the provider offers it), and revoke it at the provider whenever you like.

Data sources

• https://developers.klaviyo.com/en/reference/get_catalog_items (the API this connector calls, with a BYOK key)

Live from the Klaviyo Catalogs API (a.klaviyo.com) with a BYOK key; documentation: https://developers.klaviyo.com/en/reference/get_catalog_items. Endpoints checked against that documentation on 2026-10-16.

What it is not

Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Klaviyo Catalogs. Klaviyo Catalogs and its logos are trademarks of their owners and are used only to say which service the connector works with. It is read-only: it never creates, changes, sends or deletes anything in your Klaviyo Catalogs account.

Built for: Worldwide. Languages: English.

Klaviyo Catalogs (BYOK) — Privacy Policy

Effective 24 October 2026. Unify Dynamics LLC ("we", "us"), Menlo Park, California.

What Klaviyo Catalogs (BYOK) is. Klaviyo Catalogs (BYOK) is a connector (an MCP server and REST API) that an AI assistant calls on your behalf to read your own Klaviyo Catalogs data: Read your Klaviyo product catalog (items, variants with stock and price, and categories) with your own private API key (read-only scope catalogs:read). You bring your own Klaviyo Catalogs private API key (starts with pk_); the assistant sends it to us with each request.

BYOK key. The key you supply is used to make the one Klaviyo Catalogs call you asked for. Our application does not store it, write it to a log, put it in a cache, or share it. It is sent only to a.klaviyo.com, over https, and is removed from any text we return to you or your assistant. We do not follow redirects with your key. If Klaviyo Catalogs rejects it, we say so without repeating it.

What we receive. The arguments of each tool call, the BYOK key (for that call only), the technical headers needed to serve the request (an IP address or a client identifier supplied by the assistant) and standard server logs. What Klaviyo Catalogs receives. The request we make on your behalf, including the key and the arguments, under Klaviyo Catalogs's own terms and privacy policy. Klaviyo Catalogs acts at your direction and is the only recipient of the data of your request besides our hosting provider.

What we return. The answer Klaviyo Catalogs gives for your request, trimmed to the fields the tool documents. We do not keep it: it is returned to your assistant and not stored, cached or used to train anything.

What we do not do. We do not build a profile, sell or share personal information, or keep your Klaviyo Catalogs data. Rate-limit counters (a client identifier and timestamps) are held in memory for at most 24 hours. Hosting access logs (IP addresses, request paths and status codes) are kept for up to 30 days for security and abuse prevention; our application adds no request headers or bodies to them.

Sub-processors. Klaviyo Catalogs (the API you call with a BYOK key, at your direction). Hosting: Vercel (United States regions).

Your rights. Because we store no personal data beyond short-lived logs, requests to access, correct or delete data are usually satisfied automatically; you can still contact agent@connectorbay.com and we will respond within 30 days. Revoke your key at Klaviyo Catalogs at any time to end all access.

Children. Klaviyo Catalogs (BYOK) is a general-audience service operated by the adult using the assistant, under Klaviyo Catalogs's own age rules.

Changes. We will post changes here with a new effective date.

Klaviyo Catalogs (BYOK) — Terms of Service

Effective 24 October 2026. These terms govern use of the Klaviyo Catalogs (BYOK) connector ("the Service") operated by Unify Dynamics LLC ("we", "us").

1. The Service. Klaviyo Catalogs (BYOK) provides: Read your Klaviyo product catalog (items, variants with stock and price, and categories) with your own private API key (read-only scope catalogs:read). It is accessed through an AI assistant or directly over MCP or HTTP, and is read-only.
2. Your own key, your own account. You must use your own Klaviyo Catalogs credentials and only access data you are allowed to access. Klaviyo Catalogs's terms apply to your use of Klaviyo Catalogs; you are responsible for complying with them, including any rate limits and permitted uses. Do not share a key you do not own.
3. Independent. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by Klaviyo Catalogs. Klaviyo Catalogs and its logos are trademarks of their owners and are used only to say which service the connector works with.
4. No advice, no guarantees. Output is the data Klaviyo Catalogs returns, lightly trimmed; it may be incomplete, delayed or changed by Klaviyo Catalogs. Check important facts at the source.
5. Read-only. The Service does not create, change, send or delete anything in your Klaviyo Catalogs account.
6. Acceptable use. Automated use within the published rate limits is welcome. Do not use the Service to access data you are not entitled to, to circumvent Klaviyo Catalogs's controls, or to attack any system.
7. Availability. The Service is provided "as is" without warranty. We may change, limit or discontinue it at any time; Klaviyo Catalogs may change or end its API at any time.
8. Data. Our Privacy Policy describes what we process. In short: the BYOK key is used for the one call and not stored or logged.
9. Pro keys. Optional ConnectorBay Pro API keys are issued at our discretion and are separate from your Klaviyo Catalogs key.
10. Liability. To the fullest extent permitted by law, Unify Dynamics LLC is not liable for any loss arising from use of or reliance on the Service, including any action Klaviyo Catalogs takes on your account. Our total liability is limited to US $100.
11. Governing law. California law; venue in San Mateo County, California.
12. Contact. Unify Dynamics LLC · agent@connectorbay.com · https://connectorbay.com/byok-klaviyo-catalogs

Klaviyo Catalogs (BYOK) support

Email agent@connectorbay.com. We answer within two business days.

• MCP endpoint: https://byok-klaviyo-catalogs.connectorbay.com/mcp
• REST API: https://byok-klaviyo-catalogs.connectorbay.com/openapi.json
• Live status: https://byok-klaviyo-catalogs.connectorbay.com/health

When you report a problem, include the question you asked your agent, roughly when, and which agent you used (for example Claude, ChatGPT or Gemini). Never send us passwords, account numbers or ID numbers. Klaviyo Catalogs (BYOK) never asks for them.