Which agents does Rebilder detect?
The AI platforms Rebilder recognizes today, and the signals — headers, signatures, user agents — it recognizes them by.
The platforms
| Shown in Console as | What it is |
|---|---|
| chatgpt | OpenAI’s assistants and fetchers — ChatGPT browsing on a user’s behalf, OAI-SearchBot, and GPTBot. |
| claude | Anthropic’s Claude fetching pages for a user or for retrieval (ClaudeBot, Claude-User, Claude-Web). |
| claude-code | Anthropic’s developer CLI — a coding agent that fetches pages as markdown. |
| opencode | The open-source OpenCode CLI agent. |
| perplexity | Perplexity’s answer engine (PerplexityBot and its on-demand user fetcher). |
| gemini | Google’s Gemini assistant fetchers (including Google-Extended). |
| googlebot / bingbot | Search engine crawlers. Recognized — but classified as crawlers, not agents, and always served your normal HTML. |
| unknown | A requester that behaves like an agent (e.g. asks for markdown) but isn’t attributable to a known platform. |
The detection signals, in plain language
Detection checks the cheapest, most reliable signals first:
- What the request asks for — agents that want markdown say so, with an
Accept: text/markdownheader. That is the strongest signal. - A signed identity header — some agents send a Signature-Agent header (an emerging “Web Bot Auth” standard) naming who they are. Rebilder reads it for classification, and cryptographic verification of the signature is live in the gateway — it starts saying “verified: yes” once trusted platform keys are on file (the shipped key registry is deliberately empty until real published keys are pinned).
- Protocol paths — requests to commerce-protocol endpoints like
/mcpor/.well-known/ucpmark a protocol client. - The user-agent string — a fallback pattern match against the known platforms above.
Every newly observed agent in the wild gets its real request headers recorded as a test fixture, so detection keeps improving without you doing anything. When none of the signals match, the visit is classified as human.