README
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Agent Sandbox
Fast, Multi-Cloud Sandbox Engine for AI Agents
What is Agent Sandbox?
Agent Sandbox is an open-source sandbox engine for AI agents. It is purpose-built for three classes of workload:
- Lightning Fast — pre-warmed pools keep isolated environments on standby, eliminating cold-start latency for high-frequency agent loops, evaluations, and RL rollouts
- Enterprise Grade — deploy on any cloud using native Kubernetes CRDs, RBAC, and multi-cluster routing, without vendor lock-in
- Agentic RL — stateful environments with deterministic resets and any-image runtimes, built for complex multi-turn agent training
Key Features
| Feature | Description | |
|---|---|---|
| ⚡ | Speed — Sub-60ms allocation | Pre-warmed pools deliver idle sandboxes instantly, unblocking high-volume agent loops and multi-turn RL rollouts |
| ☸️ | Infrastructure — Containers or microVMs | Run on your existing estate using CRDs, namespaces, RBAC, and autoscaling to manage warm capacity efficiently |
| 🌐 | Routing — Cross-region and cross-cloud | Dispatch requests across clouds, clusters, and regions without forcing application teams to manage routing logic |
| 🧪 | Runtime — Zero-rebuild runtimes | Run any Docker image for SWE tasks, RL environments, and internal tools without building custom VM images |
| 🔌 | Ecosystem — Drop-in agent SDKs | Seamless compatibility with E2B clients, SWE-ReX workflows, and popular reinforcement learning frameworks |
| 📊 | Observability — Console-grade visibility | Complete view of pools, active sessions, logs, and metrics through a unified product console |
Use Cases
Reinforcement Learning at Scale
RL training requires thousands of environment resets per hour. Agent Sandbox pre-warms a pool of sandboxes so each rollout worker gets a fresh, isolated environment in milliseconds — removing the environment-reset bottleneck from your training loop. Supports SWE-bench Verified, SWE-Gym, Terminal-bench, and custom task distributions.
AI Coding Agents & Evaluations
Give every agent turn or eval call its own isolated execution environment. The E2B-compatible API means existing SWE-agent, SWE-ReX, and similar frameworks work without modification.
Enterprise Multi-Cluster Deployment
Deploy sandbox pools across multiple clouds or regions. The built-in ExtProc routing layer dispatches requests to the most available cluster transparently — no routing logic required in application code. Supported cloud providers: AWS, Google Cloud, Azure, Alibaba Cloud, Volcengine, Cloudflare.
Coming soon: microVM-backed sandboxes for stronger isolation guarantees.
Documentation
| Resource | Link |
|---|---|
| Documentation site | scitix.github.io/Agent-Sandbox |
| API Reference (OpenAPI) | /docs/api/sandboxes/CreateSandbox |
| Installation guide | /docs/installation |
| Integrations | /docs/integrations |
| Changelog | /docs/changelog |
Contributing
Contributions are welcome — bug reports, feature requests, documentation, and code. Please read CONTRIBUTING.md before submitting a pull request.
All commits must include a Signed-off-by line (DCO). Use git commit -s.
License
Apache License 2.0 — see LICENSE for details.
Copyright © 2026 ScitiX.
Directories
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| Path | Synopsis |
|---|---|
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api
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v1alpha1
Package v1alpha1 contains API Schema definitions for the agents v1alpha1 API group.
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Package v1alpha1 contains API Schema definitions for the agents v1alpha1 API group. |
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cmd
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envoyextproc
command
envoyextproc is the Envoy ExternalProcessor companion process for the agent-sandbox data plane.
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envoyextproc is the Envoy ExternalProcessor companion process for the agent-sandbox data plane. |
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envoyextproc/app
Package extproc contains the bootstrap logic for the envoyextproc binary (cmd/envoyextproc).
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Package extproc contains the bootstrap logic for the envoyextproc binary (cmd/envoyextproc). |
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sandbox
command
sandbox is the open-source build of the agentbox operator.
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sandbox is the open-source build of the agentbox operator. |
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sandbox/app
Package controller contains the core bootstrap logic for the agentbox operator (cmd/sandbox).
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Package controller contains the core bootstrap logic for the agentbox operator (cmd/sandbox). |
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sandbox/app/extconfig
Package extconfig defines the schema and loader for the extension configuration file (--extension-config).
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Package extconfig defines the schema and loader for the extension configuration file (--extension-config). |
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wsproxy
command
wsproxy is the AgentBox WebSocket proxy sidecar.
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wsproxy is the AgentBox WebSocket proxy sidecar. |
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wsproxy/app
Package wsproxy contains the bootstrap logic for the wsproxy sidecar (cmd/wsproxy).
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Package wsproxy contains the bootstrap logic for the wsproxy sidecar (cmd/wsproxy). |
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pkg
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apiserver/gen
Package gen provides primitives to interact with the openapi HTTP API.
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Package gen provides primitives to interact with the openapi HTTP API. |
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apiserver/handlers
Package handlers implements the StrictServerInterface generated from the OpenAPI spec.
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Package handlers implements the StrictServerInterface generated from the OpenAPI spec. |
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controllers/sandboxpool/poststarthooks
Package poststarthooks executes post-start hook actions on sandbox pods that have just transitioned Starting → Running.
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Package poststarthooks executes post-start hook actions on sandbox pods that have just transitioned Starting → Running. |
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e2bcompat
Package e2bcompat provides an E2B-compatible HTTP API server for AgentBox.
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Package e2bcompat provides an E2B-compatible HTTP API server for AgentBox. |
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e2bcompat/domain
Package domain provides E2B-compatible domain conversion utilities.
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Package domain provides E2B-compatible domain conversion utilities. |
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e2bcompat/gen
Package e2bgen provides primitives to interact with the openapi HTTP API.
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Package e2bgen provides primitives to interact with the openapi HTTP API. |
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e2bcompat/handlers
Package handlers implements the E2B-compatible StrictServerInterface generated by oapi-codegen.
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Package handlers implements the E2B-compatible StrictServerInterface generated by oapi-codegen. |
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e2bcompat/router
Package router provides E2B-compatible HTTP route registration.
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Package router provides E2B-compatible HTTP route registration. |
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e2bcompat/router/middleware
Package middleware provides E2B-compatible authentication middleware.
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Package middleware provides E2B-compatible authentication middleware. |
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envoy/extproc
Package extproc implements an Envoy ExternalProcessor (ExtProc) gRPC server.
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Package extproc implements an Envoy ExternalProcessor (ExtProc) gRPC server. |
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framework
Package framework defines the host/extension contract shared by every extension point in AgentBox (SandboxPool lifecycle Plugins, quota Providers, and future Providers such as billing or telemetry).
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Package framework defines the host/extension contract shared by every extension point in AgentBox (SandboxPool lifecycle Plugins, quota Providers, and future Providers such as billing or telemetry). |
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lifecycle/schedule
Package schedule implements the per-pool streaming claim scheduler.
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Package schedule implements the per-pool streaming claim scheduler. |
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metrics
Package metrics defines and registers all custom Prometheus metrics for AgentBox.
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Package metrics defines and registers all custom Prometheus metrics for AgentBox. |
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utils/dockerconfig
Package dockerconfig builds and parses Kubernetes `.dockerconfigjson` payloads for imagePullSecret Secrets of type kubernetes.io/dockerconfigjson.
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Package dockerconfig builds and parses Kubernetes `.dockerconfigjson` payloads for imagePullSecret Secrets of type kubernetes.io/dockerconfigjson. |
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utils/hostalias
Package hostalias provides an in-process /etc/hosts-style resolver driven by the Manager-pushed ClusterConfig.HostAliases list.
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Package hostalias provides an in-process /etc/hosts-style resolver driven by the Manager-pushed ClusterConfig.HostAliases list. |
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utils/httpctx
Package httpctx provides shared helpers for extracting authentication context from gin-based HTTP handlers.
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Package httpctx provides shared helpers for extracting authentication context from gin-based HTTP handlers. |
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utils/httplog
Package httplog centralizes HTTP request logging for the AgentBox API servers.
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Package httplog centralizes HTTP request logging for the AgentBox API servers. |
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utils/k8sname
Package k8sname provides validation for Kubernetes resource names with a stricter variant of RFC 1123 DNS label rules: names must start with a lowercase letter (not a digit).
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Package k8sname provides validation for Kubernetes resource names with a stricter variant of RFC 1123 DNS label rules: names must start with a lowercase letter (not a digit). |
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utils/resource
Package resource provides utilities for computing resource sums across Pod containers.
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Package resource provides utilities for computing resource sums across Pod containers. |
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version
Package version holds the build-time version for all AgentBox components.
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Package version holds the build-time version for all AgentBox components. |
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wsmux
Package wsmux adapts a gorilla/websocket connection into a net.Conn so that yamux can multiplex independent logical streams on top of it, and gRPC can run on top of yamux.
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Package wsmux adapts a gorilla/websocket connection into a net.Conn so that yamux can multiplex independent logical streams on top of it, and gRPC can run on top of yamux. |
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wsproxy/config
Package config holds the wsproxy runtime configuration.
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Package config holds the wsproxy runtime configuration. |
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wsproxy/gen
Package wsproxygen provides primitives to interact with the openapi HTTP API.
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Package wsproxygen provides primitives to interact with the openapi HTTP API. |
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wsproxy/server
Package server provides the two HTTP servers for wsproxy:
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Package server provides the two HTTP servers for wsproxy: |
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wsproxy/syncmgr
Package syncmgr implements the WSProxy sync manager that maintains persistent WebSocket connections to every Worker cluster and pushes API key, SandboxTemplate, and ClusterConfig updates.
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Package syncmgr implements the WSProxy sync manager that maintains persistent WebSocket connections to every Worker cluster and pushes API key, SandboxTemplate, and ClusterConfig updates. |
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wsproxy/syncmgr/handlers
Package handlers implements the wsproxygen.StrictServerInterface for the internal management API (:9004).
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Package handlers implements the wsproxygen.StrictServerInterface for the internal management API (:9004). |
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