Discover / email-verifier.underscoredone.com

Email Verifier

Not checked

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.

x402
Base
Solana
USDC
Verification

Challenge detected: 1 of the last check
Median response: 757 ms
Last checked: 14 Oct, 18:06 UTC
In our index since: 14 Oct 2026

Endpoint

curl -i https://email-verifier.underscoredone.com
# 402 Payment Required: pay with an x402 client (USDC on Base),
# then send the same request again with the payment attached.

Agents can find it through the Superstables MCP server and JSON API: GET /api/v1/services/email-verifier.underscoredone.com

Recent checks

14 Oct 2026One bar per check, showing up to 20 recent checks. Coloured bars show relative response time, with a minimum visible height; full-height grey bars mean no challenge was detected. “Challenge detected” means HTTP 402 or another detected payment-challenge signal.14 Oct 2026

All 1 checks

When (UTC)	Result	HTTP	Response
14 Oct, 18:06 UTC	Challenge detected	402	757ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 14 Oct, 18:06 UTC, it returned HTTP 402 or another detected payment-challenge signal. This check did not test payment, delivery or compatibility with the Superstables client.

What payment terms does Email Verifier advertise?

The listing advertises x402, Base, Solana and USDC. Check the seller's current payment challenge and authentication requirements before paying.

Where is Email Verifier listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 14 Oct 2026.

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