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# context.invoke

`context.invoke()` triggers another workflow run and pauses until the invoked workflow finishes.

The calling workflow resumes once the invoked workflow either **succeeds**, **fails**, or is **canceled**.

<Note>
  Workflows can only invoke other workflows that were served together in the same `serveMany` route.
  For details, see [Invoke other workflows](/workflow/features/invoke).
</Note>

## Arguments

<ParamField body="workflow" type="function" required>
  The workflow definition to invoke.
  Must be a workflow exposed under the same `serveMany`.
</ParamField>

<ParamField body="body" type="any">
  The payload to send to the invoked workflow.
  This value will be set as `context.requestPayload` in the invoked workflow.
</ParamField>

<ParamField body="headers" type="object" optional>
  Optional HTTP headers to forward to the invoked workflow.
  This value will be set as `context.headers` in the invoked workflow.
</ParamField>

<ParamField body="workflowRunId" type="string" optional>
  Override the workflow run ID for the invoked workflow.
  Defaults to a new ID if not specified.
</ParamField>

<ParamField body="retries" type="number" optional>
  Number of retry attempts configuration of the invoked workflow.
  Defaults to `3`. Retries use exponential backoff.
</ParamField>

<ParamField body="retryDelay" type="number|string" optional>
  Delay between retries of the invoked workflow.
</ParamField>

<ParamField body="flowControl" type="object" optional>
  Flow control configuration of the invoked workflow.

  See [Flow Control](/workflow/features/flow-control) for details.

  <Expandable title="properties">
    <ParamField body="key" type="string">
      A logical grouping key that identifies which requests share the same flow control limits.
    </ParamField>

    <ParamField body="rate" type="number">
      The maximum number of allowed requests per second.
    </ParamField>

    <ParamField body="parallelism" type="number">
      The maximum number of concurrent requests allowed.
    </ParamField>

    <ParamField body="period" type="string|number">
      The time window used to enforce the defined rate limit. Default is `1s`.
    </ParamField>
  </Expandable>
</ParamField>

## Response

<ResponseField name="body" type="any">
  The response body returned by the invoked workflow.
</ResponseField>

<ResponseField name="isFailed" type="boolean">
  `true` if the invoked workflow completed with failure.
</ResponseField>

<ResponseField name="isCanceled" type="boolean">
  `true` if the invoked workflow was canceled before completion.
</ResponseField>

## Usage

```ts theme={"system"}
const { body, isFailed, isCanceled } = await context.invoke(
  "invoke another workflow",
  {
    workflow: anotherWorkflow,
    body: "test",
    header: {...}, // headers to pass to anotherWorkflow (optional)
    retries,       // number of retries (optional, default: 3)
    retryDelay,    // delay between retries (optional, uses exponential backoff by default)
    flowControl,   // flow control settings (optional)
    workflowRunId  // workflowRunId to set (optional)
  }
);
```