postmaster%2540example.com

Email validation API: RFC-style syntax check plus live MX-record lookup (with RFC 5321 A-record fallback) over DNS-over-HTTPS — no third-party service, nothing stored.

Email validation API: RFC-style syntax check plus live MX-record lookup (with RFC 5321 A-record fallback) over DNS-over-HTTPS — no third-party service, nothing stored. Returns parsed domain, sorted MX hosts, and a 'deliverable' flag meaning DNS will accept mail for the domain — it does NOT verify the mailbox exists. Use for lead cleaning, signup validation, and contact verification by agents. Cached up to 1 hour per address.

UNRATEDDelisted

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.005 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0x552cc4a1…657ca3f6

URL

https://gateway.stride20k.com/email/validate/postmaster%2540example.com

Seen

first 34 days ago · last 15 days ago

52 free handshakes

Payment

Pays through

— never asked

Offered on?

— never asked

Listed on?

Base

Score, from free handshakes onlyweights 2026.09.5

UN
RATED

0.080 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by liveness · gap to 1.000 is 0.920: 0.073 uncertain ? + 0.847 short ? · 0.370 to D

How the composite of 0.080 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.75	0.00	0.000		0.000	−0.750	0
latency p95 it answered as fast as its class	0.25	0.61	0.319		0.080	−0.097	−0.073
Composite	1.00		0.080	gap to 1.000 = 0.920 · 0.847 short · 0.073 uncertain	0.080	−0.847	−0.073

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check; price stability · nothing to score

The multiplication, written out

  0.750 × 0.000   liveness   
+ 0.250 × 0.319   latency p95
= 0.080           → UNRATED: 52 of 30 paid calls      weights 2026.09.5 · 52 samples · seed cap_01M1A51WA5XDB3Z3RWGE2DN1BA|2026-08-27T00:51:40.247Z|2026.09.5

Verify it yourselfnpx teppi-check https://gateway.stride20k.com/email/validate/postmaster%2540example.comcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A51WA5XDB3Z3RWGE2DN1BA