Chronary provides calendar infrastructure tailored for AI agents, enabling them to create calendars, manage events, query availability, and synchronize with human calendar applications. It is designed specifically for agent ecosystems, allowing automated agents to handle scheduling tasks and coordinate with both other agents and human users through a REST API and an MCP server. Chronary does not offer a human-facing UI or rely on Google OAuth, focusing instead on programmatic access for agent-based workflows.
Key features include the ability to create and manage events with full CRUD operations and arbitrary JSON metadata, as well as to subscribe to external calendars such as Google, Apple, or Outlook. Each calendar receives an iCal feed URL, and webhook events are supported for 18 event types, with HMAC-SHA256 signatures for security. The platform enables advanced scheduling capabilities, such as negotiating meetings between multiple agents, reserving and confirming temporal holds, and finding overlapping availability across any number of agents using intersection algorithms. Each agent is treated as a first-class entity with unique IDs, audit trails, and rate limits, and dedicated API keys can be assigned per agent for granular credential management.
Chronary is accessible via multiple integration methods. It offers native SDKs for TypeScript, Python, and Go, as well as a command-line interface. The API can be used directly with cURL or through the MCP server, which registers tools for Claude, GPT, and any MCP-compatible agent using stdio or HTTP transports. Framework adapters are available for integration with platforms such as Vercel AI SDK, OpenAI SDK, LangChain, and Mastra, allowing developers to incorporate Chronary’s scheduling tools into existing agent frameworks without SDK lock-in.
The service is currently in early access, offering a free Pro tier with full features until its public launch, and does not require a credit card for signup. Chronary positions itself as a complete calendar and scheduling API for AI agents, supporting integration with any large language model framework and providing the infrastructure needed for automated scheduling and time management in agent-driven applications.
In the Frameworks & SDKs space, chronary takes a focused approach. It enables developers to integrate calendar-as-a-service functionality into Python applications easily. chronary is an open-source project aimed at python developers. The project is open source (Apache-2.0). chronary is available on the web, the command line, and API.
Chronary builds and maintains chronary, and the product first shipped in 2026. The project is developed in the open on GitHub with 13 commits in the last 90 days. Across PulseGate's embedding index, chronary has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are Calendar API client, event management, and authentication support.
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