> ## Documentation Index > Fetch the complete documentation index at: https://tbd-6fc993ce-hypeship-docker-sandboxes-integration.mintlify.site/llms.txt > Use this file to discover all available pages before exploring further. # Execute a command synchronously ## OpenAPI ````yaml https://app.stainless.com/api/spec/documented/kernel/openapi.documented.yml post /browsers/{id}/process/exec openapi: 3.1.0 info: title: Kernel API description: Developer tools and cloud infrastructure for AI agents to use web browsers version: 0.1.0 servers: - url: https://api.onkernel.com description: API Server security: - bearerAuth: [] tags: - name: Browsers description: Create and manage browser sessions. - name: Browser Replays description: Record and manage browser session video replays. - name: Profiles description: Create, list, retrieve, and delete browser profiles. - name: Browser Filesystem description: Read, write, and manage files on the browser instance. - name: Browser Computer Controls description: Control mouse, keyboard, and screen on the browser instance. - name: Browser Playwright description: Execute Playwright code against the browser instance. - name: Browser Processes description: Execute and manage processes on the browser instance. - name: Browser Logs description: Stream logs from the browser instance. - name: Extensions description: Create, list, retrieve, and delete browser extensions. - name: Proxies description: Create and manage proxy configurations for routing browser traffic. - name: Browser Pools description: Create and manage browser pools for acquiring and releasing browsers. - name: Managed Auth description: >- Create and manage auth connections for automated credential capture and login. - name: Credentials description: Create and manage credentials for authentication. - name: Credential Providers description: Configure external credential providers like 1Password. - name: Apps description: List applications and versions. - name: Deployments description: Create and manage app deployments and stream deployment events. - name: Invocations description: Invoke actions and stream or query invocation status and events. - name: Projects description: Create and manage projects for resource isolation within an organization. paths: /browsers/{id}/process/exec: post: tags: - Browser Processes summary: Execute a command synchronously operationId: processExec parameters: - name: id in: path required: true description: Browser session ID schema: type: string requestBody: required: true content: application/json: schema: $ref: '#/components/schemas/ProcessExecRequest' responses: '200': description: Execution result content: application/json: schema: $ref: '#/components/schemas/ProcessExecResult' '400': $ref: '#/components/responses/BadRequest' '404': $ref: '#/components/responses/NotFound' '500': $ref: '#/components/responses/InternalError' security: - bearerAuth: [] x-codeSamples: - lang: JavaScript source: >- import Kernel from '@onkernel/sdk'; const client = new Kernel({ apiKey: process.env['KERNEL_API_KEY'], // This is the default and can be omitted }); const response = await client.browsers.process.exec('id', { command: 'command' }); console.log(response.duration_ms); - lang: Python source: |- import os from kernel import Kernel client = Kernel( api_key=os.environ.get("KERNEL_API_KEY"), # This is the default and can be omitted ) response = client.browsers.process.exec( id="id", command="command", ) print(response.duration_ms) - lang: Go source: "package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/kernel/kernel-go-sdk\"\n\t\"github.com/kernel/kernel-go-sdk/option\"\n)\n\nfunc main() {\n\tclient := kernel.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\tresponse, err := client.Browsers.Process.Exec(\n\t\tcontext.TODO(),\n\t\t\"id\",\n\t\tkernel.BrowserProcessExecParams{\n\t\t\tCommand: \"command\",\n\t\t},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", response.DurationMs)\n}\n" components: schemas: ProcessExecRequest: type: object description: Request to execute a command synchronously. required: - command properties: command: type: string description: Executable or shell command to run. args: type: array description: Command arguments. items: type: string default: [] cwd: type: string description: Working directory (absolute path) to run the command in. nullable: true pattern: ^/.* env: type: object description: Environment variables to set for the process. additionalProperties: type: string default: {} as_user: type: string description: Run the process as this user. nullable: true as_root: type: boolean description: Run the process with root privileges. default: false timeout_sec: type: integer description: Maximum execution time in seconds. nullable: true additionalProperties: false ProcessExecResult: type: object description: Result of a synchronous command execution. properties: exit_code: type: integer description: Process exit code. stdout_b64: type: string description: Base64-encoded stdout buffer. stderr_b64: type: string description: Base64-encoded stderr buffer. duration_ms: type: integer description: Execution duration in milliseconds. additionalProperties: false Error: type: object required: - code - message properties: code: type: string description: Application-specific error code (machine-readable) example: bad_request message: type: string description: Human-readable error description for debugging example: 'Missing required field: app_name' details: type: array description: Additional error details (for multiple errors) items: $ref: '#/components/schemas/ErrorDetail' inner_error: $ref: '#/components/schemas/ErrorDetail' ErrorDetail: type: object properties: code: type: string description: Lower-level error code providing more specific detail example: invalid_input message: type: string description: Further detail about the error example: Provided version string is not semver compliant responses: BadRequest: description: Bad Request – invalid input content: application/json: schema: $ref: '#/components/schemas/Error' NotFound: description: Resource not found content: application/json: schema: $ref: '#/components/schemas/Error' InternalError: description: Internal Server Error content: application/json: schema: $ref: '#/components/schemas/Error' securitySchemes: bearerAuth: type: http scheme: bearer ````