agentprobe.org
0100 ms10,021 ms2026-09-07T09:36:19+00:00 · ok · 10021 ms2026-09-08T12:43:42+00:00 · ok · 1661 ms2026-09-09T13:16:22+00:00 · ok · 364 ms2026-09-10T14:02:31+00:00 · ok · 503 ms2026-09-11T15:01:25+00:00 · ok · 395 ms2026-09-07 09:362026-09-11 15:010100 ms10,021 ms2026-09-07T09:36:19+00:00 · ok · 10021 ms2026-09-08T12:43:42+00:00 · ok · 1661 ms2026-09-09T13:16:22+00:00 · ok · 364 ms2026-09-10T14:02:31+00:00 · ok · 503 ms2026-09-11T15:01:25+00:00 · ok · 395 ms2026-09-07 09:362026-09-11 15:01
probe history, latency (log) over time, glyph = outcome
A grade
ok
100 score
395 ms
100.0% uptime over 5 measured probes
AS13335 CLOUDFLARENET - Cloudflare, Inc., US · US

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

x402 first seen 2026-09-07 · last seen 2026-09-11 · json

Listed in

sourcenamedescriptionexternal id
x402 Bazaar (Coinbase CDP discovery)https://http-header-checker.underscoredone.com/checkhttps://http-header-checker.underscoredone.com/check

Same host

a2a × 1 agents-txt × 1 ard × 1 llms-txt × 1 robots × 1 · 1 alive sigdir × 1

Badge

agentprobe grade A

embed:

<a href="https://agentprobe.org/endpoint/21622"><img src="https://agentprobe.org/badge/21622.svg" alt="agentprobe"></a>

Probe history

probed (UTC)outcomescorestatushttpmsversioncapabilitieserror
2026-09-11 15:01ok100 402HTTP/1.1395
details

capabilities 

{"payment_header":true,"content_type":"application/json","accepts":0}

meta 

{"final_url":"https://http-header-checker.underscoredone.com/check","http_version":"HTTP/1.1","vantage":"us-east-1"}
HTTP 402
2026-09-10 14:02ok100 402HTTP/1.1503
details

capabilities 

{"payment_header":true,"content_type":"application/json","accepts":0}

meta 

{"final_url":"https://http-header-checker.underscoredone.com/check","http_version":"HTTP/1.1","vantage":"us-east-1"}
HTTP 402
2026-09-09 13:16ok100 402HTTP/1.1364
details

capabilities 

{"payment_header":true,"content_type":"application/json","accepts":0}

meta 

{"final_url":"https://http-header-checker.underscoredone.com/check","http_version":"HTTP/1.1","vantage":"us-east-1"}
HTTP 402
2026-09-08 12:43ok100 4021661
details

capabilities 

{"payment_header":true,"content_type":"application/json","accepts":0}

meta 

{"final_url":"https://http-header-checker.underscoredone.com/check","vantage":"us-east-1"}
2026-09-07 09:36ok100 40210021
details

capabilities 

{"payment_header":true,"content_type":"application/json","accepts":0}

meta 

{"final_url":"https://http-header-checker.underscoredone.com/check","vantage":"us-east-1"}