AgentsKB

AgentsKB is a free knowledge layer for AI agents, providing verified, sourced answers to technical questions instead of relying solely on a model's training data. It maintains a curated knowledge base of over 39,000 questions and answers spanning 244+ technologies. Instant Mode returns pre-curated answers in about 40ms, each linked to official documentation, while Research Mode researches official sources in real time for uncovered technologies and adds the results back into the knowledge base. AgentsKB integrates via MCP for Claude, Cursor, and Cline, or through a direct REST API, supports bulk queries processing 100 questions in under one second, and every answer includes links to official documentation to eliminate hallucinated URLs. The service is completely free with no signup, API keys, or stated usage limits.