Notice of Change

This page lists important service-level changes that may impact your integration with LHV Connect. Each notice includes a summary of what’s changing, who it affects, and any required actions.

Notices are listed in reverse chronological order, with the newest changes at the top.

For assistance with updates or other aspects of the Connect API, please contact [email protected].

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📣 Response Compression in Connect API

Issued: 22 April 2025 Original Production Release: 26 May 2025 Updated: 28 May 2025 New Production Release: 9 June 2025

The roll out of the response compression change has been delayed to give customers more time to prepare. The new production release date is: 9 June 2025

What’s Changing and Why

LHV Connect is introducing response compression for large API responses to improve performance and transmission efficiency. Compression applies to payloads ≥10MB and helps reduce bandwidth usage, especially for endpoints that return large message bodies (e.g., Get next message). Most modern HTTP clients support decompression automatically, but behavior may vary depending on the tools or libraries used.

This change is currently available in Prelive environment and is scheduled for Production rollout on 9 June 2025 (previously planned for 26 May 2025).

Does This Affect You?

This change may impact you if:

• You use the UK Connect API: https://connect.lhv.com (Clients using https://connect.lhv.eu are not affected)

• You use Connect’s Message Services, such as GET /messages/next

• You expect to receive API responses ≥10MB

• Your HTTP client does not support response decompression or lacks a compatible Accept-Encoding header

If a compressed response is triggered but your client cannot decompress it, the API may return an error (e.g., HTTP 500). Currently, the most likely affected service is Account Statement delivery.

What You Need to Do

To ensure compatibility:

• Add the Accept-Encoding header to your requests: gzip, deflate, or both

• Confirm that your HTTP client supports decompression (most modern libraries do this by default)

Compression will only be applied if:

• The response body is at least 10MB, and

• The request includes a supported Accept-Encoding header

Now we have also available a dedicated service for quick and easy testing of Compression. More details at Get compressed message for testing

Additional Information and Resources

• For more details see Response Compression

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