D grade
card-invalid
30 score
2100 ms
0.3 version
0.0% uptime over 3 measured probes
AS16509 AMAZON-02 - Amazon.com, Inc., US · US
https://docs.cello.so/.well-known/agent-card.json
a2a first seen 2026-09-07 · last seen 2026-09-09 · json
Listed in
| source | name | description | external id |
|---|---|---|---|
| Agenstry | Cello | a2a_agent:docs.cello.so |
Same host
agents-txt × 1 ard × 1 llms-txt × 1 robots × 1 · 1 alive sigdir × 1
Badge
embed:
<a href="https://agentprobe.org/endpoint/6933"><img src="https://agentprobe.org/badge/6933.svg" alt="agentprobe"></a>
Probe history
| probed (UTC) | outcome | score | status | ms | version | capabilities | error |
|---|---|---|---|---|---|---|---|
| 2026-09-09 09:15 | card-invalid | 30 | 200 | 2100 | 0.3 | detailscapabilities {"era":"1.0","skills_count":1,"skills":["cello"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["HTTP+JSON"],"signatures":0}meta {"card_url":"https://docs.cello.so/.well-known/agent-card.json","card":{"name":"Cello","version":"1.0.0","provider":{"url":"https://docs.cello.so/","organization":"Cello"},"documentationUrl":"https://docs.cello.so/"},"missing_fields":["description"],"vantage":"us-east-1"} | missing ['description'] |
| 2026-09-08 08:13 | card-invalid | 30 | 200 | 2243 | 0.3 | detailscapabilities {"era":"1.0","skills_count":1,"skills":["cello"],"streaming":false,"push_notifications":false,"security_schemes":[],"bindings":["HTTP+JSON"],"signatures":0}meta {"card_url":"https://docs.cello.so/.well-known/agent-card.json","card":{"name":"Cello","version":"1.0.0","provider":{"url":"https://docs.cello.so/","organization":"Cello"},"documentationUrl":"https://docs.cello.so/"},"missing_fields":["description"],"vantage":"us-east-1"} | missing ['description'] |
| 2026-09-07 05:03 | http-error | 404 | 1058 | detailsmeta {"card_url":"https://docs.cello.so/.well-known/agent.json"} | HTTP 404 |