# MCP

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](/sandbox-agent/docs/custom-tools).