# Python exception: ssl.SSLCertVerificationError

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This is the markdown version of https://openbrokerapi.com/errors/python/ssl-ssl-cert-verification-error, written from the same records as that page.

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As text you can copy:

```
ssl.SSLCertVerificationError
```

- Kind: Exception
- Where you meet it: Raised in your own program
- Read from: [Python 3 documentation, ssl, Exceptions](https://docs.python.org/3/library/ssl.html#ssl.SSLCertVerificationError)
- Status: verified. Source: [docs.python.org](https://docs.python.org/3/library/ssl.html#ssl.SSLCertVerificationError), checked 2026-10-09.

## What does ssl.SSLCertVerificationError mean in Python?

A subclass of SSLError raised when certificate validation has failed. It carries a numeric verify_code and a readable verify_message.

## What it means in trading API work

Python could not confirm that the server is the one it claims to be. Usual causes are missing or out of date root certificates, a wrong clock, a proxy that signs traffic again with its own certificate, or a wrong host name.

This part is this site's own explanation, written for people learning to call a trading API. It is not part of the source cited above and it describes no particular broker.

## What should I do about ssl.SSLCertVerificationError?

Read verify_message. Update the root certificates Python uses, and check the clock and the host name. Do not disable verification: it is what stops your credentials going to the wrong server.

This page is an independent explanation in plain words. The definition itself is in [the source it was read from](https://docs.python.org/3/library/ssl.html#ssl.SSLCertVerificationError), which is the authority if the two ever differ.

## Where to go next

- [Everything decoded for Python](https://openbrokerapi.com/errors/python)
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- [Error codes](https://openbrokerapi.com/errors): What each error means, and the fix where the source gives one.

## Licence and how to cite

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Cite as: Python exception: ssl.SSLCertVerificationError. Broker API Hub, https://openbrokerapi.com/errors/python/ssl-ssl-cert-verification-error, newest check 2026-10-09.

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