CapabilitiesBuilt-in agents
Send it a prompt
The provider runs an agent for you: you send a prompt, it does the work in the sandbox.
Who offers it
Part of Built-in agents, which explains why it matters.
Fully: Agent 37, Boat and Sandboxer. With a catch: Lizard. Not at all: Blaxel, boxd, Cloudflare Sandbox, Daytona, E2B, InstaBox, Modal, Morph, Runtime, Sprites, Tensorlake and Vercel Sandbox.
- Agent 37Yes
The Agent API on each template takes a message and streams the reply; sessions continue a thread.
docs-confirmed “Send a message or task to the agent on your instance.” Source
- BoatYes
One call queues a prompt to a named harness, with steering, interrupts and an event stream.
docs-confirmed “Queue a natural-language work item for an agent harness” Source
- SandboxerYes
A prompt call returns a prompt id and an event stream, with steering for three harnesses.
docs-confirmed “The call returns at once with `promptId`, `conversationId` and `status: "queued"`.” Source
- LizardWith a catch
The catch: You can send a prompt from the command line, but the SDK and API have no prompt call, so a program cannot start an agent.
docs-confirmed “`lizard sandbox prompt <id> <prompt...>` sends a prompt and streams what the agent does.” Source
- BlaxelNo
Note: There is no prompt endpoint; Agent Runtime, the product that would run the loop, is marked Soon.
Agents Hosting runs your own deployed agent, not a prompt-to-work API.
docs-confirmed “Session-first, stateful runtime for long-running agents.” Source
- boxdNo
Note: boxd runs the machine, not the agent loop; Anthropic or OpenAI runs the loop in the documented integrations.
docs-confirmed “Anthropic runs the agent loop.” Source
Note: Your Worker holds the credentials and the agent runs as a process you start; there is no prompt endpoint.
docs-confirmed “Your Worker starts the sandbox, holds the credentials, and decides which hostnames the sandbox can reach.” Source
- DaytonaNo
Note: No agent is hosted and there is no prompt call; you install and drive the agent.
docs-confirmed “Run Claude Code in a Daytona Sandbox via CLI” Source
- E2BNo
Note: Guides show agents running in a sandbox, but no API takes a prompt and runs one for you.
docs-confirmed “Run AI coding agents like Claude Code, Codex, and Amp in secure E2B sandboxes with full terminal, filesystem, and git access.” Source
- InstaBoxNo
Note: There is no prompt endpoint; the API offers exec, files, desktop and snapshots.
Your agent runs as a process you start inside the machine.
inferred “exec`: Run a command” Source
- ModalNo
Note: Modal sells the computer, not an agent loop; the docs show SDK code you write.
inferred “Sandboxes are useful for tasks like executing code generated by an LLM” Source
- MorphNo
Note: The tmux API lets your program type into an agent, but Morph runs no agent loop of its own.
docs-confirmed “Devboxes expose a full tmux API, which lets you programmatically manage coding agents like OpenAI Codex or Claude Code.” Source
- RuntimeNo
Note: Runtime has no agent-run API; its own docs say no bridge harness has run on it yet.
docs-confirmed “No bridge harness (Claude Code, Codex) has run on Runtime yet.” Source
- SpritesNo
Note: Sprites host an agent you install; there is no prompt endpoint.
inferred “Give it a Sprite that sleeps until it's needed and wakes up remembering everything.” Source
Note: Tensorlake exposes a sandbox as a tool for your own agent; it does not run an agent from a prompt.
inferred “Expose Tensorlake sandboxes as tools to your LLM agents” Source
Note: Agents are in the image but there is no API that runs one; you open a terminal or use the CLI.
docs-confirmed “The default image is `vercel/sandbox/universal`, which includes the current Node.js LTS, Python 3.14, coding agents, and common utilities.” Source
Related
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