What is Aion?

The Aion platform is:

• a network harness sitting above your agent that provides a normalized integration surface to external networks and services like an MCP gateway and LLM router.
• an application architecture for structuring agentic applications into composable, distributed components.
• a control plane, runtime, and identity system for hosting, observing, and managing agentic applications.

In short, Aion is a full-stack platform for the development and operation of agentic applications, integrating development, hosting, and ops concerns into a unified experience.

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Aion’s Network Harness

Aion sits between your agent runtime and the models, services, networks, and people it needs to reach. It connects external channels such as web apps, Slack, email, voice, and A2A with internal services such as model providers and MCP servers. Read the stack from the bottom up:

1. Models provide inference through hosted or open providers.
2. Agent frameworks such as LangGraph and Google ADK implement the agent’s reasoning and behavior.
3. The Aion AI Networking Harness normalizes application work and governs how it enters and leaves the runtime.
4. External networks expose the application to web apps, people, services, and other agents over channels such as Slack, email, voice, and A2A.

Requests, messages, and events move down through the harness to the agent. Results and outbound actions move back through the same boundary, so the agent implementation does not need a separate integration model for every network. Within the harness, Distribution Ions adapt external requests before they reach configured runtimes, while the Model and MCP Gateways govern calls from those runtimes to internal services. Together, these paths give external ingress and internal service calls a consistent integration and security boundary.

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Aion’s Agentic Architecture

HTTP applications have Models, Views, and Controllers. Distributed applications have microservices. Aion applies the same compositional idea to agentic applications: assemble them from smaller, shareable components and operate them at scale. An Aion is an identity-rooted Agentic Application composed of Ions: building blocks that each perform one job in the application. Distribution Ions make its Identity reachable on external networks, Behavior Ions control how work is handled, and Deployment Ions make runnable implementations available. An Ion is not itself an agent. Its A2A capability exposes an agent that participates in the A2A protocol; the same Ion can also expose MCP or event capabilities when its job requires them. Read Ions for the building-block model, Capabilities for how capabilities are composed within an Ion, and MCP Servers for tool and resource access. Our Composer tool allows you to arrange constellations of Ions scoped by a shared Project. These Ions can communicate with each other over the A2A or MCP protocols to access each other’s capabilities. This model allows agentic applications to be composed of smaller, shareable, and specialized components. On top of this, we provide a comprehensive identity system so that access control can be managed at any level. A Project is the workspace Composer edits; it is not the application boundary. The Identity is the invariant: one Project can contain Ions serving several Aions, while one Aion can use Distribution Ions and Sequences assembled across Projects. See Composer for how those boundaries affect editing and Identities for the deeper identity model.

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Aion’s Control Plane

Aion’s Control Plane is the shared operational layer for connecting, securing, and observing Aions. It gives teams one place to govern how specialized Ions and runtime services work together, deploy implementations, manage identities and permissions, and inspect supported runtime activity. The runtime plane carries requests between external networks, Ions, models, and MCP servers. The control plane manages that runtime: it determines which configuration is active, which identities may act, how deployments are released, and what operational information teams can inspect. It is not an additional hop in every request. Connect and secure the application. The control plane configures and governs communication among specialized Ions and the models, MCP servers, and external networks they use. Shared routing, identity, and permissions let these focused agentic building blocks work together as a larger Aion without requiring each component to manage every connection itself. Teams define those relationships in Composer, and the control plane applies them consistently across the runtime. Deploy and release. Deployment Ions bring Aion-hosted and customer-operated runtimes under one operational model. Aion can build and operate Aion GitHub deployments or connect Aion Remote and A2A Remote services. The control plane tracks registered versions and health and manages Stable or Beta releases, so an implementation can evolve without rewiring the Ions that use it. Govern identity and access. Keep each Aion’s identity stable while the runtimes behind it evolve. An Aion Identity defines the application represented through its Distributions, while a Daemon Identity gives a configured runtime its own principal for internal work, permission checks, and usage attribution. Roles & Permissions let teams control what people and runtimes may do and how far that access reaches. Observe and account. Investigate supported runtime activity with traces and searchable logs, and monitor health and resource utilization for Aion-hosted runtimes. Model and MCP usage can be attributed to the user or Daemon Identity responsible for the work, helping teams connect runtime behavior to usage and cost. See Model Service usage and MCP Server usage for those service-specific views. The Traces view lets teams narrow activity by time window, Project, and log level, then compare method, duration, status, and the latest message for each flow.

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Build your first Aion

Follow Build an Aion to create a Project graph, assign an Aion Identity, and connect a Distribution Ion to a Sequence.