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OneBucket exposes four interfaces. Applications and engines use S3; agents use the data MCP tools; audit and monitoring use events; and everything you configure in the console is also available through the management API.

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Endpoints

Every region exposes an S3 endpoint and two MCP endpoints, one for data and one for events. The global endpoints work from anywhere: each request is routed to the live region nearest the caller. Use a regional endpoint when requests must be pinned to a location. Your policies are active in every region. All endpoints use HTTPS. More regions are coming online; the current list is on the support page, and live availability is on the status page.

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MCP

The data and events MCP servers share one sign-in model (OAuth 2.1 with PKCE, Dynamic Client Registration, authorization server https://oauth.onebucket.io) and one tool list, documented once for every client:

MCP overview & tools

Endpoints, sign-in, every tool with its parameters, events, and limits.

Connect a client

Step-by-step setup for Claude, ChatGPT and Muse.

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Management API

Everything you set up in the console, from keys to backends to policies, can be done through the management API, so your setup can live in your own scripts and pipelines. The full API reference is available on request after sign-up.

S3 API compatibility

Supported operations, addressing styles and errors.

Policies

What governs every call these APIs make.