Loops API Key Tester

Test any AI or API key in your browser — instantly see if it's valid, and why it isn't. Nothing is stored.

Test your Loops API key with the contacts endpoint

Data verified 2026-07-13

Key format & how to get one

1. Visit https://app.loops.so/ and sign up/login 2. Go to Settings > API Keys 3. Click 'Create API Key' 4. Provide a name and copy the generated key 5. Free tier: 1,000 emails/month

Loops API docs →

Cannot test this key from your browser

This provider blocks in-browser requests or requires a server-side secret. Test it from a terminal instead:

curl -sS 'https://app.loops.so/api/v1/contacts/find?email=test@example.com' -H 'Authorization: Bearer {{KEY}}' -H 'Content-Type: application/json'

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