Using Praetor in Claude

If you use Claude, you can connect it to our blood-test catalogue and ask about our tests without leaving the conversation. Claude can find tests by marker, goal, budget or how you want to give your sample, open the full details of one test, or compare two to four side by side.

It only reads our public catalogue. It cannot see your Praetor account, your orders or your results, and it cannot order, pay or book anything for you. Our tests are for people in the UK.

You need a Claude plan that supports custom connectors. You do not need a Praetor account or any password. On a Team or Enterprise plan, an owner may have to switch custom connectors on first.

1. In Claude, open Connectors (under Customize or Settings, depending on your version) and choose Add custom connector.

2. Call it Praetor Health and paste in this address, including the end: https://mcp.praetor.health/api/mcp?client=claude

3. If it asks about authentication, choose None and leave the other fields empty.

4. In a new chat, switch Praetor Health on from the connectors menu. If Claude asks before it looks something up, read the request and allow it.

Claude changes its settings from time to time. Its own guide to custom connectors is at https://support.claude.com/.

Ask it in plain English. For example:

“Which Praetor tests include ApoB?”

“Show me Praetor hormone panels with clinic collection under £75.”

“Compare Performance Bronze with Longevity Gold.”

“I would like a general health check. Which Praetor panels should I compare?”

There is no need to tell it your name, your medication or your results. And while it can show you which tests match what you asked, it cannot tell you whether you need a test at all.

Claude shows matching tests as cards, either one test in detail or several side by side. Use View on praetor.health to open the full product page.

Look at the total, not just the test price. Some ways of giving your sample cost extra, so a test listed under £75 can come to more once collection is added. Prices and marker lists change, and Claude can get details wrong when it writes its own summary, so check the product page before you order.

It gives you facts about our tests. It is not a doctor. It cannot read your results, tell you what is wrong or tell you which test you medically need. If a symptom is worrying you, talk to your GP.

We never see your conversation. Claude only sends us the filters it uses, such as a test name, a marker, a budget or a collection method. We do not store those against you and they do not go in our application logs, though like any website we keep basic technical records, such as whether a request worked. Anthropic looks after your chat under its own privacy policy, and ours is here.

• If Praetor is missing from a chat, check it is connected in Claude and switched on in that chat.
• If it asks for a password or key, check the address ends in ?client=claude. Our catalogue never needs one.
• If you added it before November 2026 and Claude says a Praetor tool does not exist, open Connectors under Customize, select Praetor Health, open the ⋯ menu and choose Refresh tools list.
• If nothing matches, try the test's name or a simpler marker name, and check a budget or collection filter is not ruling it out.
• If it says the catalogue is unavailable, try again shortly, or browse our tests.

To switch it off for one chat, turn it off in that chat's connectors menu. To remove it completely, open Connectors in Claude's settings and choose Disconnect or Remove. Your old chats stay in Claude until you delete them.

Stuck? Email support@praetor.health or use our contact page. Tell us what you tried and what you saw, but leave out passwords and your results.

Prefer ChatGPT? Here is how to add it.