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Dell shares tumble as Barclays questions AI valuations

Dell Technologies shares plunged more than 11% on Wednesday after Barclays downgraded the computer and server manufacturer, citing stretched valuations and uncertainty over the sustainability of enterprise artificial intelligence spending. The stock closed at approximately $508, marking one of its steepest daily declines in more than a year. The sell-off followed Barclays analyst Tim Long’s…

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How to Trigger AI Agents from Webhooks: Signature Verification, Retries, and Idempotency

Message me in Slack when Dev finally uploads the Q4 financials. That one line is why webhooks matter for AI agents. Without them, an agent can only act when someone asks it to, or when it is polled on…

  • Verify webhook signature using HMAC SHA256 with shared secret key
  • Check timestamp freshness window (5 minutes) to prevent replay attacks
  • Use idempotency keys to deduplicate retries and ensure single agent action

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