Run Claude Managed Agents with Vercel Sandbox
By Steven Van ·
Each session runs in an isolated Firecracker microVM with credential brokering and deny-by-default network egress.
Vercel now lets developers self-host the execution environment for Claude Managed Agents on Vercel Sandbox. Anthropic still runs the model, harness, tools and session state, but an agent's tool calls can now execute on a developer's own Vercel infrastructure, with access to private APIs, internal services and customer data.
Each agent session runs in its own isolated Firecracker microVM, spawned by a Vercel function control plane. What's included:
- A managed agent loop from Anthropic: model, harness, tools and session state
- A Vercel function control plane that spawns a sandbox per session
- Firecracker microVM isolation per session, with millisecond startup
- Credential brokering at the firewall, so secrets never enter the sandbox
- Deny-by-default egress with a domain allowlist
- Low-latency connectivity to a developer's private network and cloud workloads
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