---
id: invoke
title: 'invoke()'
slug: invoke
custom_edit_url: https://github.com/supabase/supabase/edit/master/spec/supabase_js_v1_legacy.yml
---

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import TabItem from '@theme/TabItem'

Invokes a Supabase Function.

```js
const { data: user, error } = await supabase.functions.invoke('hello', {
  body: JSON.stringify({ foo: 'bar' }),
})
```

## Parameters

<ul className="method-list-group">
  
<li className="method-list-item">
  <h4 className="method-list-item-label">
    <span className="method-list-item-label-name">
      functionName
    </span>
    <span className="method-list-item-label-badge required">
      required
    </span>
    <span className="method-list-item-validation">
      <code>string</code>
    </span>
  </h4>
  <div class="method-list-item-description">

the name of the function to invoke

  </div>
  
</li>

<li className="method-list-item">
  <h4 className="method-list-item-label">
    <span className="method-list-item-label-name">
      invokeOptions
    </span>
    <span className="method-list-item-label-badge false">
      optional
    </span>
    <span className="method-list-item-validation">
      <code>FunctionInvokeOptions</code>
    </span>
  </h4>
  <div class="method-list-item-description">

object with the following properties
`headers`: object representing the headers to send with the request
`body`: the body of the request
`responseType`: how the response should be parsed. The default is `json`

  </div>
  
</li>

</ul>

## Notes

- Requires an Authorization header.
- Invoke params generally match the [Fetch API](https://developer.mozilla.org/en-US/docs/Web/API/Fetch_API) spec.

## Examples

### Basic invocation.

```js
const { data: user, error } = await supabase.functions.invoke('hello', {
  body: JSON.stringify({ foo: 'bar' }),
})
```

### Specifying response type.

By default, `invoke()` will parse the response as JSON. You can parse the response in the following formats: `json`, `blob`, `text`, and `arrayBuffer`.

```js
const { data: user, error } = await supabase.functions.invoke('hello', {
  responseType: 'text',
  body: JSON.stringify({ foo: 'bar' }),
})
```

### Parsing custom headers.

You can pass custom headers to your function. Note: supabase-js automatically passes the `Authorization` header with the signed in user's JWT.

```js
const { data: user, error } = await supabase.functions.invoke('hello', {
  headers: {
    'my-custom-header': 'my-custom-header-value',
  },
  body: JSON.stringify({ foo: 'bar' }),
})
```