Instant.bot is a platform designed for developers that allows them to create and implement sophisticated AI agents that can use function calls to run custom tools. It uses scalable infrastructure to host your tools as REST/MCP endpoints, packaged as JavaScript functions. You can use resource access control, maintain secrets with API keychains, and create private or fork and alter open-source programs. For quick prototype and deployment, Instant offers a web chat interface as well as CLI/IDE tools that can be used in Slack, Discord, or embedded on websites. It integrates state-of-the-art LLMs such as Gemini Flash and GPT-4.1 for parallel tool invocation and precise multi-step planning. Developers pay per-use for the execution of hosted tools and monthly for the use of agents.