> ## Documentation Index > Fetch the complete documentation index at: https://api-docs.sevalla.com/llms.txt > Use this file to discover all available pages before exploring further. # Run a command in a process > Run a single command inside a running application process (container) and return its output. This is a non-interactive alternative to the WebSocket terminal: one command runs, and its stdout, stderr, and exit code are returned. The command runs directly without a shell, so pipes, redirects, and command chaining do not apply. This endpoint requires at least read access to the application. A key with only read access can run read-only commands (such as `ls`, `cat`, `env`, `ps`, `grep`); a request to run any other command is rejected with a 403. A key with write access to the application can run any command. Note that the read-only restriction is a convenience to prevent accidental changes, not a security sandbox: read-only commands can still read environment variables and files inside the container. ## OpenAPI ````yaml https://api.sevalla.com/v3/openapi.json post /applications/{id}/processes/{process_id}/exec openapi: 3.1.0 info: title: Sevalla API docs version: 1.0.0 servers: - url: https://api.sevalla.com/v3 security: - bearerAuth: [] paths: /applications/{id}/processes/{process_id}/exec: post: tags: - Applications summary: Run a command in a process description: >- Run a single command inside a running application process (container) and return its output. This is a non-interactive alternative to the WebSocket terminal: one command runs, and its stdout, stderr, and exit code are returned. The command runs directly without a shell, so pipes, redirects, and command chaining do not apply. This endpoint requires at least read access to the application. A key with only read access can run read-only commands (such as `ls`, `cat`, `env`, `ps`, `grep`); a request to run any other command is rejected with a 403. A key with write access to the application can run any command. Note that the read-only restriction is a convenience to prevent accidental changes, not a security sandbox: read-only commands can still read environment variables and files inside the container. operationId: execProcessCommandV3 parameters: - schema: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ example: fb5e5168-4281-4bec-94c5-0d1584e9e657 in: path name: id required: true description: Application identifier - schema: type: string format: uuid pattern: >- ^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|ffffffff-ffff-ffff-ffff-ffffffffffff)$ example: fb5e5168-4281-4bec-94c5-0d1584e9e657 in: path name: process_id required: true description: Process identifier requestBody: required: true content: application/json: schema: type: object properties: command: minItems: 1 maxItems: 100 type: array items: type: string description: >- Command to run, given as an argument vector where the first element is the binary and the rest are its arguments (for example `["ls", "-la", "/app"]`). The command is run directly, not through a shell, so shell features like pipes, redirects, globbing, and chaining with `;` or `&&` are not available. Run those as separate calls instead. API keys with only read access to the application can run read-only commands (such as `ls`, `cat`, `env`, `ps`, `grep`); keys with write access can run any command. example: - ls - '-la' - /app timeout: default: 15 description: >- Maximum time in seconds to wait for the command to finish before it is aborted. Defaults to 15 seconds. example: 15 type: integer minimum: 1 maximum: 60 required: - command responses: '200': description: Default Response content: application/json: schema: type: object properties: stdout: type: string description: Standard output produced by the command. example: | total 8 drwxr-xr-x 2 app app 4096 Jan 1 00:00 . stderr: type: string description: Standard error produced by the command. example: '' exit_code: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: >- Exit code returned by the command. `0` means success; any other value means the command failed. example: 0 required: - stdout - stderr - exit_code additionalProperties: false '400': description: Default Response content: application/json: schema: type: object properties: message: type: string description: Error message example: Bad request status: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: HTTP status code example: 400 data: type: object properties: code: description: Error tracking code for support reference example: err-abc-123 type: string message: description: Additional error details or instructions example: >- If you need assistance, please contact support and provide this error code. type: string additionalProperties: false required: - message - status additionalProperties: false '401': description: Default Response content: application/json: schema: type: object properties: message: type: string description: Error message example: Unauthorized status: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: HTTP status code example: 401 data: type: object properties: code: description: Error tracking code for support reference example: err-abc-123 type: string message: description: Additional error details or instructions example: >- If you need assistance, please contact support and provide this error code. type: string additionalProperties: false required: - message - status additionalProperties: false '403': description: Default Response content: application/json: schema: type: object properties: message: type: string description: Error message example: Forbidden status: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: HTTP status code example: 403 data: type: object properties: code: description: Error tracking code for support reference example: err-abc-123 type: string message: description: Additional error details or instructions example: >- If you need assistance, please contact support and provide this error code. type: string additionalProperties: false required: - message - status additionalProperties: false '404': description: Default Response content: application/json: schema: type: object properties: message: type: string description: Error message example: Not found status: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: HTTP status code example: 404 data: type: object properties: code: description: Error tracking code for support reference example: err-abc-123 type: string message: description: Additional error details or instructions example: >- If you need assistance, please contact support and provide this error code. type: string additionalProperties: false required: - message - status additionalProperties: false '429': description: Default Response content: application/json: schema: type: object properties: message: type: string description: Error message example: Too many requests status: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: HTTP status code example: 429 data: type: object properties: code: description: Error tracking code for support reference example: err-abc-123 type: string message: description: Additional error details or instructions example: >- If you need assistance, please contact support and provide this error code. type: string additionalProperties: false required: - message - status additionalProperties: false '500': description: Default Response content: application/json: schema: type: object properties: message: type: string description: Error message example: Internal Server Error status: type: integer minimum: -9007199254740991 maximum: 9007199254740991 description: HTTP status code example: 500 data: type: object properties: code: description: Error tracking code for support reference example: err-abc-123 type: string message: description: Additional error details or instructions example: >- If you need assistance, please contact support and provide this error code. type: string additionalProperties: false required: - message - status additionalProperties: false components: securitySchemes: bearerAuth: type: http scheme: bearer description: >- API key authentication. Pass your API key as a Bearer token in the Authorization header. ````