AINewsnow

I kept blaming my prompt for the Meta Ads MCP 401, and it turned out Meta was rejecting the token for 3 totally different reasons

This story is from 2026-09-12. It is preserved in the archive; the latest stories are on the live feed.

A meta ads mcp 401 is usually not a prompt problem. It is almost always auth. The most common causes I’ve seen are: short-lived user tokens expiring in 1–2 hours long-lived user tokens aging out around 60 days missing app roles, review status, or business asset assignments MCP-specific access restr…

Read the full story at DEV Community — AI ↗

Timeline · 1 report

  1. 2026-09-12 14:09 · DEV Community — AI
    I kept blaming my prompt for the Meta Ads MCP 401, and it turned out Meta was rejecting the token for 3 totally different reasons

More stories

  1. Google Joins OpenAI, Anthropic, Meta in Disclosing AI Hacks — Bloomberg AI
  2. Canadian Start-up smartARM Uses AI to Create Intuitive Bionic Prosthetics — Meta Newsroom
  3. Meta Launches Muse Mac App With File, Messages, and Calendar Access — Unite.AI
  4. Huang and Zuckerberg back AI safety without a slowdown: Why Big Tech is betting on market forces to police AI — Mint AI
  5. Meta's personal AI agent Muse climbs to No. 1 among free apps on Apple's US App Store, ahead of ChatGPT; Muse launched on September 8 (Georgia Hennessy/Business Insider) — Techmeme
  6. Release b11003 · ggml-org/llama.cpp — r/LocalLLaMA
  7. Beginner confused about Ollama vs LM Studio vs llama.cpp vs vLLM vs Unsloth — can someone explain? — r/LocalLLM
  8. Meta's Muse AI agent is very powerful — but not enough to overcome my kids' annoying school apps — Business Insider AI

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