Email Verifier & Validator
email-verifier.underscoredone.com · 1 paid endpoint · listed 2026-10-27
Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and domain, and flags free providers and role accounts like admin@ or support@. One address per call.
Paid endpoints
| Method | Endpoint | Price | Networks |
|---|---|---|---|
| POST | email-verifier.underscoredone.com/verify Takes one email address and tells you whether it can actually receive mail. Returns a verdict of valid, invalid, or risky, splits the address into username and | $0.01 | Base, Solana |
Latest checks
| When | Endpoint | HTTP | ms | Result |
|---|---|---|---|---|
| 5 days ago | email-verifier.underscoredone.com/verify | 402 | 258 | valid x402 v2 terms |
Income on Base (7 days)
This provider's payout address is shared by several providers, so its income is not shown as its own.
Is this your API?
<a href="https://logicnodes.io/observatory/p/email-verifier.underscoredone.com"><img src="https://logicnodes.io/observatory/badge/email-verifier.underscoredone.com.svg" alt="x402 status"></a>
Claim it for free with
x402_provider_claim (sign with your payout address), and get an alert within minutes when it stops answering with x402_monitor_create ($5 for 30 days). Both work over MCP (https://logicnodes.io/mcp/v2) or POST https://logicnodes.io/v1/tools/<tool>.Income is all USDC received by the provider's payout address on Base, whatever the source. Score: 0-100: 50 x share of checks in the last 72 h that returned valid x402 payment terms + 30 x min(1, log10(1 + USDC received in 7 days) / 4) + 20 x min(1, log10(1 + distinct payers in 7 days) / 3). A provider never checked scores on income only; income is all USDC received by its payout address on Base, whatever the source. JSON: /v1/observatory/providers/email-verifier.underscoredone.com