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mailpulse.theaslangroupllc.com api verify-address
https://mailpulse.theaslangroupllc.com/api/verify-address
answers 402, partial
Verify a mailing address before sending physical mail through it. Wraps Lob's US and international address verification engines: standardizes the address, flags undeliverable/incomplete addresses, and returns a deliverability verdict. Run this before /api/quote and /api/letters to avoid paying to print and post a letter that will bounce.
We sent a real
POST request to this endpoint and it
answered 402 with payment requirements we could parse.
It advertises 13 ways to pay and only 12 of them are usable.- Price
- $0.01
- Network
- base
- Pay to
- 0x50ab2018c06c6E4eAA9BA52057Eb55eD284912fc
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- POST
- Response latency
- 258 ms
- Payment options
- 12 usable of 13
- Last checked
- 2026-08-15T14:31:29.886Z (1d ago)
- Category
- identity
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Fmailpulse.theaslangroupllc.com%2Fapi%2Fverify-address"