Agent SubstrateGoogle
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Related Products
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Agent Substrate:
About
Agent Substrate is an open-source runtime for operating isolated, stateful agent and code-execution sandboxes on Kubernetes. It coordinates actor and worker lifecycles, places active workloads on a shared pool of ready capacity, and can suspend idle environments while preserving memory and filesystem state for later resumption. Sandboxes use gVisor or Cloud Hypervisor microVM isolation, with per-actor identity and network controls. Agent Substrate is designed for platform and infrastructure teams building agent-hosting services, coding environments, and other workloads that execute untrusted or intermittent tasks. The core project is Kubernetes-portable; Google Cloud also provides GKE-optimized deployment tooling. Optional Filestore agent volumes can persist workspaces across suspend and resume cycles.
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FetchSandbox:
About
FetchSandbox helps you test the integrations your AI wrote without touching production. From API request to production-ready integration, it lets developers build, test, and validate API integrations in realistic environments before deployment, catching failures early, reducing debugging time, and shipping with confidence. Instead of relying on static mocks, fake success responses, or risky production keys, FetchSandbox gives teams runnable API environments that behave like real services. Its stateful API sandbox keeps state across requests, enforces lifecycle transitions, fires real webhook events, and supports multi-step flows where integrations usually break. Developers can use the MCP Server, CLI, web app, OpenAPI import, and monitoring tools to prove an integration against APIs such as Stripe, Resend, Clerk, GitHub, Paddle, and Shopify.
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Agent Substrate:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Supported
Cloud
Not Supported
On-Premises
Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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FetchSandbox:
Platforms Supported
Windows
Not Supported
Mac
Not Supported
Linux
Not Supported
Cloud
Supported
On-Premises
Not Supported
iPhone
Not Supported
iPad
Not Supported
Android
Not Supported
Chromebook
Not Supported
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Agent Substrate:
Audience
Platform and infrastructure teams building services that run isolated agent or code-execution workloads on Kubernetes.
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FetchSandbox:
Audience
Developers and engineering teams that need to build, test, and validate API integrations in realistic sandbox environments before deployment
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Agent Substrate:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Not Supported
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FetchSandbox:
Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Agent Substrate:
API
Offers API
Supported
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FetchSandbox:
API
Offers API
Supported
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Agent Substrate:
Screenshots and Videos |
FetchSandbox:
Screenshots and Videos |
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Agent Substrate:
Pricing
$0
Agent Substrate on GKE is offered at no extra charge. GKE pricing applies to the resources you create.
Free Version
Supported
Free Trial
Not Supported
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FetchSandbox:
Pricing
$5 per month
Free Version
Supported
Free Trial
Not Supported
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Agent Substrate:
Reviews/
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FetchSandbox:
Reviews/
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Agent Substrate:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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FetchSandbox:
Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Agent Substrate:
Company InformationGoogle
Founded: 1998
United States
github.com/agent-substrate/substrate
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FetchSandbox:
Company InformationFetchSandbox
Founded: 2026
United States
fetchsandbox.com
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Agent Substrate:
Alternatives |
FetchSandbox:
Alternatives |
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Agent Substrate:
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FetchSandbox: | |||||
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Agent Substrate:
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FetchSandbox: | |||||
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Agent Substrate:
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FetchSandbox:
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Agent Substrate:
Categories |
FetchSandbox:
Categories |
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Agent Substrate:
Integrations
Model Context Protocol (MCP)
Supported
AgentMail
Not Supported
Claude Code
Not Supported
Clerk
Not Supported
Cursor
Not Supported
GitHub
Not Supported
Google Cloud Filestore
Supported
Google Cloud Platform
Supported
Kulipa
Not Supported
Paddle
Not Supported
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FetchSandbox:
Integrations
Model Context Protocol (MCP)
Supported
AgentMail
Supported
Claude Code
Supported
Clerk
Supported
Cursor
Supported
GitHub
Supported
Google Cloud Filestore
Not Supported
Google Cloud Platform
Not Supported
Kulipa
Supported
Paddle
Supported
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Agent Substrate:
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FetchSandbox:
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