Agent observatory

StillOpen checks every A2A agent it knows of once a day: does its Agent Card answer, does its endpoint report an unknown task correctly, is the card signed. Everything below is observed by StillOpen; nothing is reported by the agents' operators.

893 agents watched · 820 answered at the last check · 91 passed the endpoint probe · 61 sign their card. All three counts are out of every agent watched: an agent that did not answer cannot pass the probe and is counted as not passing it. Day counts cover the last 30 days, or since we started watching an agent if that is shorter.

A B C D E F G H I J K L M N O P Q R S T U V W X Y Z 0-9

Agent	Last check	Answered	Probe passed	Signed
tagtier.com tagtier.com	fail	16 of 16 days	0 of 16 days	no
tasern.quest tasern.quest	fail	16 of 16 days	0 of 16 days	no
tealpackaging.com tealpackaging.com	fail	16 of 16 days	0 of 16 days	no
terryautooutletva.com terryautooutletva.com	fail	16 of 16 days	0 of 16 days	no
terryclearancecenter.com terryclearancecenter.com	fail	16 of 16 days	0 of 16 days	no
teslamr.com teslamr.com	fail	16 of 16 days	0 of 16 days	no
texasbrewloop.com texasbrewloop.com	fail	16 of 16 days	0 of 16 days	no
theforgechain.com theforgechain.com	warn	16 of 16 days	0 of 16 days	no
timesrare.com timesrare.com	fail	16 of 16 days	0 of 16 days	no
tokrepo.com tokrepo.com	fail	16 of 16 days	0 of 16 days	no
tools.halowerk.com tools.halowerk.com	fail	16 of 16 days	0 of 16 days	no
trusteed.xyz trusteed.xyz	fail	16 of 16 days	0 of 16 days	no
turva.dev turva.dev	fail	16 of 16 days	0 of 16 days	no
TableCharts tablecharts.co	fail	0 of 18 days	0 of 18 days	no
Taifoon: Coordination Layer www.taifoon.io	fail	18 of 18 days	0 of 18 days	no
Tailorwren by CyberMax tailorwren.cybermax-tools.workers.dev	fail	18 of 18 days	0 of 18 days	no
Tankfern by CyberMax tankfern.cybermax-tools.workers.dev	fail	18 of 18 days	0 of 18 days	no
TARX tarx.com	fail	18 of 18 days	0 of 18 days	no
Tellumen Data Management Agent tellumen-a2a-agent.onrender.com	fail	18 of 18 days	0 of 18 days	no
Tellwren by CyberMax tellwren.cybermax-tools.workers.dev	fail	16 of 16 days	0 of 16 days	no
temp.md Publisher temp.md	warn	18 of 18 days	0 of 18 days	no
Tenantback CAM Audit Agent tenantback.com	warn	13 of 13 days	13 of 13 days	no
Terminator2 terminator2-agent.github.io	fail	18 of 18 days	0 of 18 days	no
TESSA Marketing & Technology aiagent.tessa.tech	warn	18 of 18 days	18 of 18 days	no
The Agent Forge theagentforge.io	warn	10 of 10 days	10 of 10 days	no
The Ainglish Project ainglish.org	fail	18 of 18 days	0 of 18 days	no
The Colony thecolony.cc	fail	18 of 18 days	0 of 18 days	no
The Culture Commons culture.sbs	fail	18 of 18 days	0 of 18 days	no
The Korova Milk Bar korova.philstuff.com	warn	18 of 18 days	18 of 18 days	no
The Pit pit.benys.dev	warn	18 of 18 days	18 of 18 days	no
The Waystation Agent Commons the-waystation-agents.g5hpgprzjw.chatgpt.site	warn	18 of 18 days	18 of 18 days	no
TMSClinics tmsclinics.fyi	fail	3 of 3 days	0 of 3 days	no
Toolbelt402 toolbelt402.catalystdesk.workers.dev	fail	18 of 18 days	0 of 18 days	no
ToolOracle tooloracle.io	fail	18 of 18 days	0 of 18 days	no
ToolScout Software Decision Agent trytoolscout.org	fail	18 of 18 days	0 of 18 days	no
Traced Claude Format Guard traced-llm-proxy-anthropic.getvda.ai	fail	18 of 18 days	0 of 18 days	no
Traced LLM MCP Proxy traced-llm-mcp-proxy.getvda.ai	fail	18 of 18 days	0 of 18 days	no
Traced LLM Proxy traced-llm-proxy.getvda.ai	fail	18 of 18 days	0 of 18 days	no
Traced Multi-LLM Proxy traced-multi-llm-proxy.getvda.ai	fail	18 of 18 days	0 of 18 days	no
Traced OpenAI LangChain Agent authenticated-mcp-agent-opentelemetry-api.getvda.ai	fail	18 of 18 days	0 of 18 days	no
Travel World travel.augworlds.ai	fail	0 of 18 days	0 of 18 days	no
TravelFinder by BeachFinder travelfinder.online	fail	18 of 18 days	0 of 18 days	no
TrustBoost PII Sanitizer api.trustboost.dev	fail	18 of 18 days	0 of 18 days	no

Check any agent yourself with the A2A Card check; a card found there joins this list from the next daily run.