D grade
card-invalid
30 score
979 ms
0.0% uptime over 5 measured probes
AS16509 AMAZON-02 - Amazon.com, Inc., US · US
https://yieldsignal.vercel.app/agent-card.json
a2a first seen 2026-09-07 · last seen 2026-09-11 · json
Listed in
| source | name | description | external id |
|---|---|---|---|
| Agenstry | yieldsignal.vercel.app | paid_api:yieldsignal.vercel.app |
Same host
agents-txt × 1 ard × 1 llms-txt × 1 mcp × 1 · 1 alive robots × 1 · 1 alive sigdir × 1 x402 × 17 · 17 alive
Badge
embed:
<a href="https://agentprobe.org/endpoint/10863"><img src="https://agentprobe.org/badge/10863.svg" alt="agentprobe"></a>
Probe history
| probed (UTC) | outcome | score | status | http | ms | version | capabilities | error |
|---|---|---|---|---|---|---|---|---|
| 2026-09-11 11:10 | card-invalid | 30 | 200 | HTTP/1.1 | 979 | detailsmeta {"card_url":"https://yieldsignal.vercel.app/agent-card.json","http_version":"HTTP/1.1","vantage":"us-east-1"} | neither supportedInterfaces nor url | |
| 2026-09-10 10:08 | card-invalid | 30 | 200 | HTTP/1.1 | 823 | detailsmeta {"card_url":"https://yieldsignal.vercel.app/agent-card.json","http_version":"HTTP/1.1","vantage":"us-east-1"} | neither supportedInterfaces nor url | |
| 2026-09-09 09:39 | card-invalid | 30 | 200 | 2793 | detailsmeta {"card_url":"https://yieldsignal.vercel.app/agent-card.json","vantage":"us-east-1"} | neither supportedInterfaces nor url | ||
| 2026-09-08 08:37 | card-invalid | 30 | 200 | 2565 | detailsmeta {"card_url":"https://yieldsignal.vercel.app/agent-card.json","vantage":"us-east-1"} | neither supportedInterfaces nor url | ||
| 2026-09-07 07:40 | connect-fail | 1131 | detailsmeta {"vantage":"us-east-1"} | LocalProtocolError: Invalid input ConnectionInputs.SEND_HEADERS in state ConnectionState.CLOSED |