> ## Documentation Index > Fetch the complete documentation index at: https://help.nextmatter.com/llms.txt > Use this file to discover all available pages before exploring further. # Details of form field > Show details of a form field including all instances the field is used in. Page size is 100 by default, 500 maximum. To paginate, follow the standard usage of limit and page parameters. We strongly recommend using filters with this endpoint and limiting the number of results, especially when requests are frequent. Otherwise, performance might degrade. ## OpenAPI ````yaml /reference/openapi.json get /processes/{process_id}/steps/{step_id}/actions/{action_id}/ openapi: 3.0.1 info: title: Next Matter API description: >- # Introduction This is reference documentation for the Next Matter API. It is a RESTful API that can be interacted with by sending JSON-formatted requests. Responses are also returned in a JSON format. The API doesn't expose any endpoints of the workflow editor. This means you can't use this API to edit the underlying workflow structure or change definitions. # Testing a request Use a third party client, such as curl, Postman, or Advanced REST Client, to test our REST API. termsOfService: https://www.nextmatter.com/terms-of-service contact: email: development@nextmatter.com version: v1 x-logo: url: >- https://assets-global.website-files.com/5fcecdf27451306b2081fedc/5ff43812707834743db939be_NextMatter_Logo_Horizontal.svg backgroundColor: '#FFFFFF' altText: Next Matter logo servers: - url: https://core.nextmatter.com/api security: - Bearer: [] paths: /processes/{process_id}/steps/{step_id}/actions/{action_id}/: get: tags: - Form field summary: Details of form field description: >+ Show details of a form field including all instances the field is used in. Page size is 100 by default, 500 maximum. To paginate, follow the standard usage of limit and page parameters. We strongly recommend using filters with this endpoint and limiting the number of results, especially when requests are frequent. Otherwise, performance might degrade. operationId: processes_steps_actions_read parameters: - name: process_id in: path required: true schema: type: string - name: step_id in: path required: true schema: type: string - name: action_id in: path required: true schema: type: string - name: organization in: query description: organization schema: type: string - name: process in: query description: process schema: type: string - name: lead_user in: query description: lead_user schema: type: string - name: progress in: query description: progress schema: type: string - name: id in: query description: id schema: type: string - name: ordering in: query description: Ordering schema: type: string enum: - name - '-name' - started_time - '-started_time' - last_updated_time - '-last_updated_time' - status - '-status' - priority - '-priority' - progress - '-progress' - deadline - '-deadline' - ended_time - '-ended_time' - total_runtime - '-total_runtime' - name: status in: query description: status schema: type: string enum: - running - completed - aborted - name: name in: query description: name schema: type: string - name: query in: query description: query schema: type: string - name: priority in: query description: priority schema: type: string enum: - V - H - name: started_time in: query description: started_time schema: type: string - name: last_updated_time in: query description: last_updated_time schema: type: string - name: deadline in: query description: deadline schema: type: string - name: step_deadline in: query description: step_deadline schema: type: string - name: aborted_time in: query description: aborted_time schema: type: string - name: completed_time in: query description: completed_time schema: type: string - name: ended_time in: query description: ended_time schema: type: string - name: total_runtime_min in: query description: total_runtime_min schema: type: string - name: total_runtime_max in: query description: total_runtime_max schema: type: string - name: active_step_id in: query description: active_step_id schema: type: string - name: tags in: query description: tags schema: type: string - name: instance_ids in: query description: instance_ids schema: type: string - name: page in: query description: A page number within the paginated result set. schema: type: integer - name: page_size in: query description: Number of results to return per page. schema: type: integer responses: '200': description: '' content: application/json: schema: required: - count - results type: object properties: count: type: integer next: type: string format: uri nullable: true previous: type: string format: uri nullable: true results: type: array items: $ref: '#/components/schemas/ActionInstance' components: schemas: ActionInstance: required: - instance_id type: object properties: value: title: Value type: object properties: {} readOnly: true instance_id: title: Instance id type: integer instance_name: title: Instance name type: string readOnly: true settings: title: Settings type: object properties: {} readOnly: true securitySchemes: Bearer: type: apiKey description: > Authentication is API key based. As an admin, you can generate an API key in Next Matter by going to Company > Next Matter API keys. When sending requests to the API, authenticate by passing the API key in the "Authorization" HTTP header, prepended with the string "Api-Key ". For example: Authorization: Api-Key xyzabc.12fsfe242ubdgakew name: Authorization in: header x-default: Api-Key YOUR_NM_API_KEY ````