Notable AI crawlers, with JSON-LD

Identical prose to the semantic version, but the head now carries a schema.org ItemList, so a parser is handed the structure instead of inferring it. This edition's format marker lives only inside that JSON-LD, so reporting it proves a reader parsed the structured data rather than the visible text.

GPTBot

Operated by OpenAI. Primary purpose: Training & grounding. Honours robots.txt.

ClaudeBot

Operated by Anthropic. Primary purpose: Model training. Honours robots.txt.

PerplexityBot

Operated by Perplexity. Primary purpose: Live cited answers. Honours robots.txt.