# createJwtBearerAssertion (/docs/auth/api/functions/createJwtBearerAssertion)



[@kysoql/auth](/docs/auth/api) / createJwtBearerAssertion

```ts
function createJwtBearerAssertion(options): Promise<string>;
```

Creates an RS256 JWT bearer assertion for Salesforce server-to-server
authentication.

## Parameters [#parameters]

| Parameter | Type                                                                               |
| --------- | ---------------------------------------------------------------------------------- |
| `options` | [`JwtBearerAssertionOptions`](/docs/auth/api/interfaces/JwtBearerAssertionOptions) |

## Returns [#returns]

`Promise`\<`string`>