AnswerLine is a developer tool that monitors the answers AI chatbots provide in response to user questions. It offers an API that accepts a prompt and returns the response generated by models such as ChatGPT, Gemini, and Microsoft Copilot, along with the web pages cited in that answer. The service is intended for businesses that want to observe what AI assistants say about their products, competitors, or product categories. The platform provides sentence-level citations that link each part of an AI answer to its source page. Product cards display structured details about products mentioned in responses. Country targeting enables users to run the same prompt across different regions and compare the results. Batches and webhooks support automated workflows, while a queue system allows users to manage their own request volume. Mention rates quantify how often a brand or product appears in AI answers, and a brand check function allows users to verify their brand's visibility. Typical use cases include tracking product recommendations, monitoring brand presence in AI generated responses, and identifying the web sources that influence AI answers. Users submit prompts through the API, receive the AI responses with cited sources, and use the available features to analyze and monitor the results over time.