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x402.orthogonal.com validate-email single
https://x402.orthogonal.com/fiber/v1/validate-email/single
answers 402
Checks if a given email is likely to bounce using a waterfall of strategies. Works for catch-all email addresses, which are increasingly common yet hard for other APIs to validate.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.02
- Network
- base
- Pay to
- 0x6bab1d63b3B51A88c7F87402DB2803b05f0AE9E9
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 95 ms
- Payment options
- 3 usable of 3
- Last checked
- 2026-08-15T14:40:32.859Z (3d ago)
- Category
- other
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fx402.orthogonal.com%2Ffiber%2Fv1%2Fvalidate-email%2Fsingle"