Quick start: Get your API key from the BunnyBuild Dashboard, then send it in the X-API-Key header with every request to the check endpoints.

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What is BunnyBuild?

BunnyBuild provides a simple API for two security checks:
  1. Email check — Detect if an email uses a disposable or temporary domain
  2. IP check — Classify an IP address by network type (hosting, residential, VPN, TOR, proxy, etc.)

Base URL

All requests go to: https://api.bunny.build/api/v1

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Get your API key

  1. Sign up at the BunnyBuild Dashboard
  2. Create an API token (e.g. “Production API Key”)
  3. Copy the token — it starts with sec4_ and is shown only once. Store it securely.

Authentication

Security check endpoints use API key authentication only. Include the header: X-API-Key: sec4_your_api_key

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First request

curl -X POST https://api.bunny.build/api/v1/email/check \
  -H "X-API-Key: sec4_your_api_key" \
  -H "Content-Type: application/json" \
  -d '{"email": "[email protected]"}'

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Next steps

Authentication

How to authenticate and manage API keys.

SDKs

Use our official SDKs for Python, TypeScript, Java, and Go.

Email

Disposable email detection in detail.

IP

IP classification and network types.