Endpoint · actionPOSTcors-header-checker.underscoredone.com/check

Sends a real request to any URL you provide, attaches an Origin header, and reads back all six standard cross-origin permission headers the server returns.

Sends a real request to any URL you provide, attaches an Origin header, and reads back all six standard cross-origin permission headers the server returns. Tells you whether cross-origin requests are enabled at all, whether your specific origin is permitted, and shows every permission value exactly as the server sent it. Useful for finding why a browser is blocking a request, confirming a new deployment is configured correctly, or auditing whether a public API allows credentialed calls.

UNRATEDListed

Overview

Grade?

UNRATED

0 of 30 paid calls toward a letter

Price

$0.01 per call

Paid calls

none yet

delivery unknown until someone pays

More info

Seller?

0xe9740820…0e2c2f08

URL

https://cors-header-checker.underscoredone.com/check

Seen

first 29 days ago · last 14 hr ago

54 free handshakes

Payment

Pays through

x402

Offered on?

Base USDC, Solana

Listed on?

Base, Solana

Score, from free handshakes onlyweights 2026.09.6

UN
RATED

0.730 liveness verified, no letter

To a letter · 30 paid calls

0 of 30

Held down by latency p95 · gap to 1.000 is 0.270: 0.070 uncertain ? + 0.200 short ? · 0.070 to B

How the composite of 0.730 is made up, part by part
Component	Weight	Measured	Lower bound ?		Adds	Short ?	Uncertain ?
latency p95costs the most it answered as fast as its class	0.20	0.00	0.000		0.000	−0.200	0
liveness it answered at all	0.60	1.00	0.884		0.530	0	−0.070
price stability the price stayed where it was listed	0.20	1.00	1.000		0.200	0	0
Composite	1.00		0.730	gap to 1.000 = 0.270 · 0.200 short · 0.070 uncertain	0.730	−0.200	−0.070

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

The multiplication, written out

  0.200 × 0.000   latency p95    
+ 0.600 × 0.884   liveness       
+ 0.200 × 1.000   price stability
= 0.730           → UNRATED: 53 of 30 paid calls      weights 2026.09.6 · 53 samples · seed cap_01M1RD8D2YSDNHCT5M23QGCP2C|2026-09-03T21:43:19.258Z|2026.09.6

Verify it yourselfnpx teppi-check https://cors-header-checker.underscoredone.com/checkcurl -s https://api.teppi.xyz/v1/trust/cap_01M1RD8D2YSDNHCT5M23QGCP2C