> ## Documentation Index
> Fetch the complete documentation index at: https://docs.lerian.studio/llms.txt
> Use this file to discover all available pages before exploring further.

# SPB message-log and frame access

> SPB documentation now distinguishes structured message-log reads from separately authorized access to retained signed frames.

<Badge stroke icon="calendar-days" iconType="regular">September 3, 2026</Badge> <Badge stroke icon="file-code" iconType="regular">Documentation correction</Badge> <Badge color="purple" size="lg" stroke icon="eye" iconType="regular">Review recommended</Badge>

## Affects

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Teams that retrieve SPB message logs or signed message artifacts.

## What changed

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Message-log reads return structured data. A retained signed on-wire frame is available only from its dedicated, separately authorized route. The service does not retain literal sent bytes as a separate artifact.

This is a correction to the documented current behavior; it does not announce a runtime release.

## Impact

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**Classification: Review recommended.**

## What you need to do

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Review integrations and operational procedures that need signed frames so they use the dedicated authorized route rather than a message-log response.