Discover / email-verifier.underscoredone.com

Email Verifier & Validator

■ Challenge detected

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.

Listed price
$0.01
Challenge detected
10 of the last 10 checks
Median response
133 ms
Last checked
17 Oct, 09:26 UTC
In our index since
26 Sept 2026

Endpoint

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

Checks and payment terms on this page refer to the endpoint above. Other listed endpoints have not been checked individually.

  • POSThttps://email-verifier.underscoredone.com/verify$0.01Takes 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.

A dash means the listing gives no price or method. Copy buttons copy the full URL.

Showing 1 of 1 listed endpoints.

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

Recent checks

28 Sept 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.17 Oct 2026
All 10 checks
When (UTC)ResultHTTPResponse
17 Oct, 09:26 UTCChallenge detected402272ms
16 Oct, 08:13 UTCChallenge detected402123ms
14 Oct, 21:46 UTCChallenge detected402126ms
13 Oct, 10:39 UTCChallenge detected402140ms
11 Oct, 10:02 UTCChallenge detected402247ms
9 Oct, 21:31 UTCChallenge detected402112ms
8 Oct, 15:35 UTCChallenge detected402209ms
7 Oct, 09:33 UTCChallenge detected402410ms
6 Oct, 09:33 UTCChallenge detected40253ms
28 Sept, 05:02 UTCChallenge detected40258ms

Questions

Did our last probe detect a payment challenge?

At our last probe on 17 Oct, 09:26 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 price is recorded for Email Verifier & Validator?

Its listed price is $0.01.

What payment terms does Email Verifier & Validator advertise?

The listing advertises x402, Base, Solana and USDC. It names cdp as its facilitator. Check the seller's current payment challenge and authentication requirements before paying.

Where is Email Verifier & Validator listed?

In x402 Bazaar and x402-list.com. Superstables first indexed it on 26 Sept 2026.

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