AnswerLine

AnswerLine is an API that returns what ChatGPT, Gemini, Copilot and Google (Search with AI Overviews, AI Mode, News) actually answer — as structured JSON with the sources they cite, by country. Brands and SEO tools use it to see what AI engines recommend, track when a brand enters or drops out of answers, and pull the cited sources to understand why. There's also a hosted MCP server (mcp.answerline.dev/mcp) so agents can query answers directly, and a free weekly public leaderboard tracking which brands each engine names across 10 software categories: answerline.dev/ai-visibility/ Built with Rust workers, real browser surfaces per engine, and an async task API — cheap enough that a weekly 182-prompt sweep costs a few dollars. Free tier: 500 credits, no card.