sandbox-agent/docs/mcp-config.mdx
Nathan Flurry cf7e2a92c6
SDK: Add ensureServer() for automatic server recovery (#260)
* SDK sandbox provisioning: built-in providers, docs restructure, and quickstart overhaul

- Add built-in sandbox providers (local, docker, e2b, daytona, vercel, cloudflare) to the TypeScript SDK so users import directly instead of passing client instances
- Restructure docs: rename architecture to orchestration-architecture, add new architecture page for server overview, improve getting started flow
- Rewrite quickstart to be TypeScript-first with provider CodeGroup and custom provider accordion
- Update all examples to use new provider APIs
- Update persist drivers and foundry for new SDK surface

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Fix SDK typecheck errors and update persist drivers for insertEvent signature

- Fix insertEvent call in client.ts to pass sessionId as first argument
- Update Daytona provider create options to use Partial type (image has default)
- Update StrictUniqueSessionPersistDriver in tests to match new insertEvent signature
- Sync persist packages, openapi spec, and docs with upstream changes

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Add Modal and ComputeSDK built-in providers, update examples and docs

- Add `sandbox-agent/modal` provider using Modal SDK with node:22-slim image
- Add `sandbox-agent/computesdk` provider using ComputeSDK's unified sandbox API
- Update Modal and ComputeSDK examples to use new SDK providers
- Update Modal and ComputeSDK deploy docs with provider-based examples
- Add Modal to quickstart CodeGroup and docs.json navigation
- Add provider test entries for Modal and ComputeSDK
- Remove old standalone example files (modal.ts, computesdk.ts)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Fix Modal provider: pre-install agents in image, fire-and-forget exec for server

- Pre-install agents in Dockerfile commands so they are cached across creates
- Use fire-and-forget exec (no wait) to keep server alive in Modal sandbox
- Add memoryMiB option (default 2GB) to avoid OOM during agent install

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* Sync upstream changes: multiplayer docs, logos, openapi spec, foundry config

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

* SDK: Add ensureServer() for automatic server recovery

Add ensureServer() to SandboxProvider interface to handle cases where the
sandbox-agent server stops or goes to sleep. The SDK now calls this method
after 3 consecutive health-check failures, allowing providers to restart the
server if needed. Most built-in providers (E2B, Daytona, Vercel, Modal,
ComputeSDK) implement this. Docker and Cloudflare manage server lifecycle
differently, and Local uses managed child processes.

Also update docs for quickstart, architecture, multiplayer, and session
persistence; mark persist-* packages as deprecated; and add ensureServer
implementations to all applicable providers.

Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>

* wip

---------

Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
2026-03-15 20:29:28 -07:00

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---
title: "MCP"
description: "Configure MCP servers for agent sessions."
sidebarTitle: "MCP"
icon: "plug"
---
MCP (Model Context Protocol) servers extend agents with tools and external context.
## Configuring MCP servers
The HTTP config endpoints let you store/retrieve MCP server configs by directory + name.
```ts
// Create MCP config
await sdk.setMcpConfig(
{
directory: "/workspace",
mcpName: "github",
},
{
type: "remote",
url: "https://example.com/mcp",
},
);
// Create a session using the configured MCP servers
const session = await sdk.createSession({
agent: "claude",
cwd: "/workspace",
});
await session.prompt([
{ type: "text", text: "Use available MCP servers to help with this task." },
]);
// List MCP configs
const config = await sdk.getMcpConfig({
directory: "/workspace",
mcpName: "github",
});
console.log(config.type);
// Delete MCP config
await sdk.deleteMcpConfig({
directory: "/workspace",
mcpName: "github",
});
```
## Config fields
### Local server
| Field | Description |
|---|---|
| `type` | `local` |
| `command` | executable path |
| `args` | array of CLI args |
| `env` | environment variable map |
| `cwd` | working directory |
| `enabled` | enable/disable server |
| `timeoutMs` | timeout override |
### Remote server
| Field | Description |
|---|---|
| `type` | `remote` |
| `url` | MCP server URL |
| `transport` | `http` or `sse` |
| `headers` | static headers map |
| `bearerTokenEnvVar` | env var name to inject in auth header |
| `envHeaders` | header name to env var map |
| `oauth` | optional OAuth config object |
| `enabled` | enable/disable server |
| `timeoutMs` | timeout override |
## Custom MCP servers
To bundle and upload your own MCP server into the sandbox, see [Custom Tools](/custom-tools).