---
title: "Create or update workflow variable definition"
method: PUT
path: "/v1/workflows/{workflowId}/variables/{name}"
tags: ["WorkflowVariables"]
---

# Create or update workflow variable definition

`PUT /v1/workflows/{workflowId}/variables/{name}`

## Path parameters

- `workflowId` string, required
- `name` string, required

## Request body

- union
  - object
  - UpsertWorkflowVariableDefParams
    - `default` unknown
    - `description` string
    - `lifetime` 'persist' | 'reset', required
    - `name` string
    - `type` 'number' | 'text' | 'boolean' | 'list' | 'object', required

## Response `200`

OK

- VariableDef
  - `default` unknown
  - `description` string
  - `lifetime` 'persist' | 'reset'
  - `name` string
  - `type` 'number' | 'text' | 'boolean' | 'list' | 'object'

---

[API](https://skmtc.dev/b3os/apis/b3os-workflow-api.md) · [All operations](https://skmtc.dev/b3os/apis/b3os-workflow-api/llms.txt) · [OpenAPI document](https://skmtc-service-production.skmtc.workers.dev/v1/apis/b3os/b3os-workflow-api/revisions/a8c7af3c66a1/schema)