The Cat API (BYOK)

The Cat API (BYOK) — connector documentation

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

What The Cat API (BYOK) is for

The Cat API (BYOK) lets an AI assistant read your own The Cat API data through the The Cat API API with a key you supply (The Cat API API key). Read-only: 6 tools (list_breeds, search_breeds, get_breed, list_breed_groups, search_images, get_image). 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 api.thecatapi.com. Unofficial connector by Unify Dynamics LLC: not affiliated with, endorsed by or sponsored by The Cat API. The Cat API 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:

• "List some cat breeds"
• "Find the cat breed called Siamese"
• "Tell me about the cat breed with id siam"
• "Which cat breed groups exist?"
• "Show me cat pictures of the Siamese breed"
• "Get cat image abc"

What it does

• list_breeds: List cat breeds with their descriptive data as sent by the service, optionally in random or reverse order. Use page to continue.
• search_breeds: Search cat breeds by name (1 to 30 characters).
• get_breed: Get one cat breed by its identifier (from list_breeds or search_breeds).
• list_breed_groups: List the distinct cat breed groups.
• search_images: Search cat images, optionally only of given breeds, with image size, source credit and the breed data.
• get_image: Get one cat image record by its image id.

BYOK key

You bring your own The Cat API The Cat API API key (https://thecatapi.com/signup). 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 api.thecatapi.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://docs.thecatapi.com/reference (the API this connector calls, with a BYOK key)

Live from the The Cat API API (api.thecatapi.com) with a BYOK key; documentation: https://docs.thecatapi.com/reference. 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 The Cat API. The Cat API 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 The Cat API account.

Built for: Worldwide. Languages: English.

The Cat API (BYOK) — Privacy Policy

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

What The Cat API (BYOK) is. The Cat API (BYOK) is a connector (an MCP server and REST API) that an AI assistant calls on your behalf to read your own The Cat API data: Browse cat breeds and cat images with breed data from The Cat API using your own API key. You bring your own The Cat API The Cat API API key; the assistant sends it to us with each request.

BYOK key. The key you supply is used to make the one The Cat API 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 api.thecatapi.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 The Cat API 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 The Cat API receives. The request we make on your behalf, including the key and the arguments, under The Cat API's own terms and privacy policy. The Cat API acts at your direction and is the only recipient of the data of your request besides our hosting provider.

What we return. The answer The Cat API 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 The Cat API 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. The Cat API (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 The Cat API at any time to end all access.

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

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

The Cat API (BYOK) — Terms of Service

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

1. The Service. The Cat API (BYOK) provides: Browse cat breeds and cat images with breed data from The Cat API using your own API key. 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 The Cat API credentials and only access data you are allowed to access. The Cat API's terms apply to your use of The Cat API; 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 The Cat API. The Cat API 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 The Cat API returns, lightly trimmed; it may be incomplete, delayed or changed by The Cat API. Check important facts at the source.
5. Read-only. The Service does not create, change, send or delete anything in your The Cat API 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 The Cat API'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; The Cat API 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 The Cat API 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 The Cat API 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-thecatapi

The Cat API (BYOK) support

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

• MCP endpoint: https://byok-thecatapi.connectorbay.com/mcp
• REST API: https://byok-thecatapi.connectorbay.com/openapi.json
• Live status: https://byok-thecatapi.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. The Cat API (BYOK) never asks for them.