Action Gateway API Referencepublic
Last verified 19 Oct 2026
Action Gateway gives applications and AI agents governed access to tens of thousands of tools through a managed MCP endpoint or SDK. See What You Can Build for example use cases of Action Gateway with Harness Runtime.
The Action Gateway API endpoints are organized into the following groups:
- Action Gateway (43 endpoints): Action Gateway gives AI agents governed access to tools over the Model Context Protocol (MCP). The
/v2/action-gatewayendpoints manage the tool catalog and the resources that control how agents use it:- Tools browse and search the catalog, its providers, and global provider and tool health.
- Toolbelts are versioned, team-owned sets of tools that sessions and policies reference as
toolbelt:<name>@<version>. - Output views reshape a tool’s output before it reaches the agent.
- MCP servers register your own remote MCP servers and choose which of their tools to enable.
- Connections authorize one of your end users to use a provider’s tools, for example through OAuth.
- Sessions bind a tool selection and permission policy to an MCP URL that an agent connects to.
- Users and end user limits show and limit activity per end user, identified by a session’s
actorId.
- Action Gateway Data Plane (6 endpoints): The Action Gateway data plane finds and runs tools in a session. These endpoints are the REST forms of the session’s MCP meta tools:
POST /tools/searchisaction_search.POST /tools/invokeisaction_invoke.POST /code/executeisaction_code.