agentprobe.org
062 ms3,844 ms2026-09-07T07:58:34+00:00 · connect-fail · 3844 ms2026-09-09T10:19:08+00:00 · http-error · 1067 ms2026-09-07 07:582026-09-09 10:19062 ms3,844 ms2026-09-07T07:58:34+00:00 · connect-fail · 3844 ms2026-09-09T10:19:08+00:00 · http-error · 1067 ms2026-09-07 07:582026-09-09 10:19
probe history, latency (log) over time, glyph = outcome
F grade
http-error
— score
1067 ms
0.0% uptime over 2 measured probes
AS16509 AMAZON-02 - Amazon.com, Inc., US · US

https://docs.cello.so/

agents-txt first seen 2026-09-07 · last seen 2026-09-09 · json

Same host

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

Badge

agentprobe grade F

embed:

<a href="https://agentprobe.org/endpoint/581009"><img src="https://agentprobe.org/badge/581009.svg" alt="agentprobe"></a>

Probe history

probed (UTC)outcomescorestatushttpmsversioncapabilitieserror
2026-09-09 10:19http-error 404HTTP/1.11067
details

meta 

{"url":"https://docs.cello.so/agents.txt","http_version":"HTTP/1.1","vantage":"us-east-1"}
HTTP 404
2026-09-07 07:58connect-fail 3844
details

meta 

{"vantage":"us-east-1"}
LocalProtocolError: Invalid input ConnectionInputs.SEND_HEADERS in state ConnectionState.CLOSED