Who signs their requests
5 of 14 researched operators publish Web Bot Auth keys that sites can check. The others can only be verified by IP address or reverse DNS, or not at all.
Directory 2026-10-28; keys 2026-11-02T10, refreshed 3 minutes ago. These are the signed releases installs download.
| Operator | Signing | Signed agents | Keys | Key directory | Other checks |
|---|---|---|---|---|---|
| Browserbase 1 agent | Signs requests | Browserbase | 2 newest 7 hours ago | www.browserbase.com fetched 3 minutes ago | none |
| DuckDuckGo 2 agents | Signs requests | DuckAssistBot | 1 newest 7 days ago | assistbot.duckduckgo.com fetched 3 minutes ago | verified (IP) IP lists |
| Google 32 agents | Signs requests | Google-Agent | 5 newest 7 days ago | agent.bot.goog fetched 3 minutes ago | verified (IP) IP lists, reverse DNS |
| Meta 7 agents | Signs requests | none | 5 newest 7 days ago | www.meta.com fetched 3 minutes ago | none |
| Posterna 2 agents | Signs requests | PosternaProbe | 1 newest 5 days ago | posterna.com fetched 3 minutes ago | none |
| OpenAI 9 agents | Reported, not confirmed | ChatGPT Agent | 1 newest 6 days ago | chatgpt.com fetched 3 minutes ago | verified (IP) IP lists |
| Amazon 9 agents | No keys published | Amazon Bedrock AgentCore Browser | 0 | kzejmtkesloc1.keydirectory.signer.ap-northeast-1.on.aws | verified (IP) IP lists |
| Anthropic 6 agents | No keys published | none | - | none | verified (IP) IP list |
| Apple 3 agents | No keys published | none | - | none | verified (IP) IP list, reverse DNS |
| Common Crawl 1 agent | No keys published | none | - | none | verified (IP) IP list, reverse DNS |
| Microsoft 5 agents | No keys published | none | - | none | verified (IP) IP list, reverse DNS |
| Mistral AI 3 agents | No keys published | none | - | none | verified (IP) IP lists |
| Perplexity 2 agents | No keys published | none | - | none | verified (IP) IP lists |
| xAI 6 agents | No keys published | none | - | none | none |
111 more operators are known only from community lists and have not been researched yet. Run an operator? Get verified.