## TL;DR

Send your Kagi key with the Bot scheme in the Authorization header, not Bearer.

## Fix

1. Send your Kagi key with the Bot scheme in the Authorization header, not Bearer.
   Expected: you can confirm this matches your situation.

## When to use

- You are dealing with this situation.
- The symptom matches: Kagi auth uses the Bot scheme, not Bearer.

## When NOT to use

- Unrelated issues with a different cause.
- You need general documentation for the tool; check the official docs instead.

## Compatibility

Reported per the linked source.

## Variant phrasings

### Kagi auth uses the Bot scheme, not Bearer

## Why it happens

Kagi API reference notes (ai-tools kagi-search api-reference.md): authentication uses the Bot scheme in the Authorization header - the header value is the word Bot followed by your key, not the Bearer scheme nearly every other search API uses.

## Edge cases

- If your error message differs even slightly, this is probably a different issue; search the exact text.
- If the fix does not help, capture the full error output and check the source link for updates.