verify?email=someone%40example.com

Check whether an email address is well-formed and its domain can receive mail, before you send.

Check whether an email address is well-formed and its domain can receive mail, before you send. Five DNS checks on an email address, no message sent: syntax, MX presence and hosts, SPF record, DMARC policy, disposable domain, role address. Returns deliverable as NO, RISKY or LIKELY. It does not open an SMTP session and says so: mailbox existence is explicitly not c…

UNRATEDListed

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?

0x2c871c2b…cd27735f

URL

https://api.x-402.online/v1/email/verify?email=someone%40example.com

MCP server on this host: online.x-402/mcp

Seen

first 9 days ago · last 11 hr ago

15 free handshakes

Payment

Pays through

x402 · MPP tempo

Offered on?

Base USDC, Solana

Listed on?

Base, Solana

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.530 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held back by sample size, not by the seller · gap to 1.000 is 0.470: 0.284 uncertain ? + 0.186 short ? · 0.120 to C

How the composite of 0.530 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
livenesscosts the most it answered at all	0.60	1.00	0.527		0.316	0	−0.284
latency p95 it answered as fast as its class	0.20	0.07	0.070		0.014	−0.186	0
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.530	gap to 1.000 = 0.470 · 0.186 short · 0.284 uncertain	0.530	−0.186	−0.284

Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check

The multiplication, written out

  0.600 × 0.527   liveness       
+ 0.200 × 0.070   latency p95    
+ 0.200 × 1.000   price stability
= 0.530           → UNRATED: 13 of 30 paid calls      weights 2026.09.6 · 13 samples · seed cap_01M3BHH8BNW4K20N5429Q47BQT|2026-09-02T16:53:51.369Z|2026.09.6

Verify it yourselfnpx teppi-check https://api.x-402.online/v1/email/verify?email=someone%40example.comcurl -s https://api.teppi.xyz/v1/trust/cap_01M3BHH8BNW4K20N5429Q47BQT