F grade
http-error
— score
13936 ms
0.0% uptime over 1 measured probe
AS16509 AMAZON-02 - Amazon.com, Inc., US · US
https://api.letter.ai/
llms-txt first seen 2026-09-07 · last seen 2026-09-11 · json
Same host
agents-txt × 1 ard × 1 mcp × 1 · 1 alive robots × 1 sigdir × 1
Badge
embed:
<a href="https://agentprobe.org/endpoint/272865"><img src="https://agentprobe.org/badge/272865.svg" alt="agentprobe"></a>
Probe history
| probed (UTC) | outcome | score | status | http | ms | version | capabilities | error |
|---|---|---|---|---|---|---|---|---|
| 2026-09-07 09:01 | http-error | 404 | 13936 | detailsmeta {"url":"https://api.letter.ai/llms.txt","vantage":"us-east-1"} | HTTP 404 |