Callio

Callio acts as a unified API gateway, simplifying the way software interact with diverse web services. Instead of managing authentication, rate limits, and individual keys for every service, connecting through Callio allows for streamlined interaction via a single proxy. Key features include a centralized key management system for over 50 APIs, automatic handling of authentication injection and rate limits, and comprehensive usage tracking and billing. It integrates seamlessly with popular tools like Claude Code, Cursor, and any MCP-compatible application, providing a robust backend for complex software interactions. This platform is ideal for engineering teams and developers building sophisticated software that requires access to multiple external services. It eliminates the complexity of multi-API management, allowing teams to focus on core product development. Callio supports a wide range of APIs, including search, payments, email, and data services, all accessible through one unified endpoint.