Kickbox
Email verification API
- Authentication
- No auth
- HTTPS
- Yes
- CORS
- Yes
- Category
- Documentation / URL
- https://open.kickbox.com/
Overview
Kickbox’s open endpoint checks if an email’s domain is disposable — keyless and CORS-enabled (verified live). The full verification API (syntax, deliverability, risk) is the paid product; the open endpoint is free.
Quick Start
Disposable check (verified live):
curl "https://open.kickbox.com/v1/disposable/[email protected]"{ "disposable": false }Authentication
None — keyless for the open endpoint.
Rate Limits & Notes
- The open endpoint is free and keyless (verified).
- It only answers
disposable: true|false— the full Kickbox API (email verification with deliverability checks) is a paid service. - Great for a quick “reject burner emails” check in signup flows.
FAQ
Is Kickbox free? The open disposable-check endpoint is free and keyless (verified); full verification is paid.
What does the open endpoint return?
Just {"disposable": true|false}.
Where’s the full API? Kickbox’s paid verification API (api.kickbox.com) with a key.
More in Email
| API | Auth | HTTPS | CORS | |
|---|---|---|---|---|
| AGPC Domain Check Check a domain's SPF, DKIM, DMARC and MX with a graded shareable report | No auth | Yes | Yes | ↗ |
| Atomic Mail Email for AI agents: programmatic inbox creation and send/receive over JMAP | API Key | Yes | Unknown | ↗ |
| Cloudmersive Validate Validate email addresses, phone numbers, VAT numbers and domain names | API Key | Yes | Yes | ↗ |
| Disify Validate and detect disposable and temporary email addresses | No auth | Yes | Yes | ↗ |
| DropMail GraphQL API for creating and managing ephemeral e-mail inboxes | No auth | Yes | Unknown | ↗ |