# clm_10DBF50012C0

subject: Vercel (/record/vercel.md)  
predicate: feature_added  
value: native subscription authentication  
valid_from: 2026-09-14  
valid_to: null  
published: 2026-09-14  
recorded: 2026-11-06  
confidence: 0.70  
status: valid  
assertable: true  
superseded_by: null  
last_updated: 2026-11-06  
cite: AsOf. "Vercel feature added: native subscription authentication", as of 2026-09-14. Claim clm_10DBF50012C0, https://asof.is/claim/clm_10DBF50012C0, accessed 2026-11-08. Source: https://vercel.com/changelog/ai-sdk-harness-native-subscription-authentication.  
checked: 2026-11-06 · its source page states the value and the date  

> AI SDK harness layer now supports native subscription authentication Felix Arntz Software Engineer Blog Changelog 14 Sep 2026 1 min read Copy The AI SDK harness layer now supports authenticating harnesses through their native subscriptions, where the underlying harness supports them.

What https://vercel.com/changelog/ai-sdk-harness-native-subscription-authentication says, word for word.

## Sources

- https://vercel.com/changelog/ai-sdk-harness-native-subscription-authentication (primary, Vercel, published 2026-09-14)

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AsOf is a temporal fact ledger: a structured, dated, sourced record of what is true and what changed, built for AI retrieval.