www.carbon.fyi

Card: https://www.carbon.fyi/.well-known/agent-card.json
Watched since 2026-10-17, found by StillOpen.

Last check, 2026-11-02 03:02 UTC: fail

warn looks like an A2A 0.3 card (top-level url); v1.0 lists endpoints in 'supportedInterfaces'
info https://www.carbon.fyi/mcp#agent-card-extension carries no version in its path; a breaking change then has no new URI to move to (4.6.3)
info declares https://www.carbon.fyi/mcp#agent-card-extension
info no 'provider' - nothing says who operates this agent
info no 'documentationUrl'
fail endpoint https://www.carbon.fyi/api/mcp: robots.txt disallows this path

Last 30 days (watched since 2026-10-17): answered on 17 of 17 days checked, probe passed on 0. Our check took a median 0.6s (card fetch plus probes, from our server — not the agent's own latency). Card signature: none.

Daily history, last 90 days

One mark per day we checked: green probe passed, amber card answered, red did not answer. Days without a check are not shown.