AINewsnow

Why an API works in curl but fails at the browser preflight

This story is from 2026-10-02. It is preserved in the archive; the latest stories are on the live feed.

I have seen a request work in curl and fail before the browser sends the same POST. The difference can be an OPTIONS preflight. The browser asks whether the origin, method, and request headers are allowed. If the server responds with 401 or omits one of the required headers, the application request…

Read the full story at DEV Community — AI ↗

Timeline · 1 report

  1. 2026-10-02 12:07 · DEV Community — AI
    Why an API works in curl but fails at the browser preflight

More stories

  1. Bring near-Astra intelligence to everyday work with GPT-6.1 Sol on Amazon Bedrock — AWS Machine Learning Blog
  2. Gemini 4 Argon: our next era of frontier intelligence — Google Gemini Blog
  3. Introducing Olmo-core 3: Open, scalable training infrastructure for large MoEs — Allen Institute for AI (Ai2)
  4. Google Releases New Gemini Model With Guardrails Amid A.I. Safety Debate — New York Times Technology
  5. OpenAI announces ‘dots’ agent after scrapping launch of new AI model over safety concerns — The Guardian AI
  6. OpenAI DevDay 2026 Keynote (FULL) — OpenAI YouTube
  7. Google tests its plan for AI data centers in space with Project Suncatcher — Scientific American
  8. FTC launches broad investigation into Anthropic, OpenAI — Washington Post AI

Get the daily brief of stories like this at 6:30 every morning →