# Process Runtime REST API

Process REST API is the list of REST APIs which is used to navigate the process flow from start to finish and to communicate with each other node over the process flow. The transfer of data happens over the network, which communicates through HTTP/HTTPS protocols.

The below table show the list of REST API methods provided to control process flow. For more details please check the [API Guide](https://docs.oneweb.tech/oneweb/api-guide/process-runtime-api/list-all-methods-of-rest-api-and-explain-the-api-functionality)

| **Request**                                                                                                      | **Description**                               | **HTTP Method** |
| ---------------------------------------------------------------------------------------------------------------- | --------------------------------------------- | --------------- |
| 1. /BPMREST/service/runtime/process/start                                                                        | To start the flow.                            | POST            |
| 2. /BPMREST/service/runtime/process/\[Process Name]/start                                                        | Old API to start flow. It is not recommended. | POST            |
| 3. /BPMREST/service/runtime/tasks/\[Task ID]/claim?user=\[User Name]                                             | To claim a task by user.                      | POST            |
| 4. /BPMREST/service/runtime/tasks/\[Task ID]/complete?user=\[User Name]                                          | To complete a process by user.                | POST            |
| 5. /BPMREST/service/runtime/instance/\[Instance ID]/tasks                                                        | To get task by instance ID.                   | GET             |
| 6. /BPMREST/service/runtime/tasks?\[group/role/user]=\[User Name/Role Name/Group Name]                           | To get task by user or role or group name     | GET             |
| 7. /BPMREST/service/runtime/tasks/\[Task ID]/variables                                                           | To get Task variables                         | POST            |
| 8. /BPMREST/service/runtime/tasks/\[Task ID]/assign?user=\[User Name]\&user=\[User Name1]..\&user=\[User Name n] | To assign task to user/ users                 | POST            |
| 9. /BPMREST/service/runtime/instance/\[Instance ID]/tasks/assign?user=\[User Name]                               | To assign instance to user                    | POST            |
| 10. /BPMREST/service/runtime/refreshCache                                                                        | To refresh cache for all process              | POST            |
| 11. /BPMREST/service/runtime/classAction                                                                         | To refresh cache for a specific process       | POST            |