In outbound HTTPS setups, where we are the client, we support [mutual authentication](https://en.m.wikipedia.org/wiki/Mutual_authentication) in addition to [basic authentication](https://en.m.wikipedia.org/wiki/Basic_access_authentication).

Mutual authentication or two-way authentication (not to be confused with *two-factor* authentication) refers to two parties authenticating each other at the same time in an authentication protocol. It is the default mode of authentication in some protocols (e.g. [SSH](https://en.m.wikipedia.org/wiki/Secure_Shell)) and optional in others (e.g. [TLS](https://en.m.wikipedia.org/wiki/Transport_Layer_Security)).

!!!Warning
**NOTE:** This should NOT be confused with our wildcard SSL/TLS certificate for our `*.pageroonline.com` domain.

The HTTP client certificate described on this page is used for client-to-server authentication using client-side X.509 authentication.
!!!

Download our HTTP client certificates below.

### Pagero Online HTTP client certificate

- Download: [:icon-download:Pagero HTTP client certificate [!badge icon="check-circle" variant="success" text="Current"]](https://github.com/pagero/integration-resources/raw/main/certificates/http/pagero-online/pagero-online-http-client-certificate_20260506.zip)
- Valid from: 2026-05-12
- Valid to: 2027-05-06
- Serial number (cert): `00b53486c584cf0624`
- MD5 fingerprint (zip): `b7f925abb2da0f615d8328a4c3321401`
- SHA1 fingerprint (zip): `6abdcf88791e1f84bf4ee940a117936b20917939`

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