Open banking posts old versions and missing

[modulo-]

3 posts seem missing and the first one is a version from before the other 3 existed (as it was updated with xrefs after initial publishing)
Please see copies from web archive below

https://web.archive.org/web/20201130133110/https://www.contextis.com/en/blog/open-banking-open-for-business

https://web.archive.org/web/20200501135406/https://www.contextis.com/en/blog/open-banking-the-challenges

https://web.archive.org/web/20201223133154/https://www.contextis.com/en/resources/tools/open-banking-tooling-message-signing-authorisation-redirect

https://web.archive.org/web/20201223133156/https://www.contextis.com/en/blog/open-banking-read-write-api-tooling