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What you saw

[🦚 Manifest M001] Missing the Authorization header. Set it to "Bearer mnfst_<your-key>".
See https://manifest.build/docs/errors/M001

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Why it happened

Your client called /v1/chat/completions without an Authorization header. Manifest checks an agent API key on every request, so the header has to be there.

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How to fix it

  1. Grab your agent’s key from the dashboard (Workspace, agent, key).
  2. Add the header to every request: Authorization: Bearer mnfst_<your-key>.
  3. If you’re using an SDK, set the API key in its config instead of building the header by hand.