> ## Documentation Index
> Fetch the complete documentation index at: https://docs.neynar.com/llms.txt
> Use this file to discover all available pages before exploring further.

# fetchAuthorizationUrl

Fetch authorization url

> **Group:** Signer APIs

Use this when you need: **Fetch authorization url**.

## Usage

```ts theme={"system"}
import { NeynarAPIClient, Configuration } from "@neynar/nodejs-sdk";

const client = new NeynarAPIClient(
  new Configuration({ apiKey: "YOUR_NEYNAR_API_KEY" })
);

const res = await client.fetchAuthorizationUrl({
  clientId: "example", // required
  responseType: "value", // required
});
console.log(res);
```

## Parameters

| Parameter      | Type                                    | Required | Description |
| -------------- | --------------------------------------- | :------: | ----------- |
| `clientId`     | `string`                                |     ✅    | -           |
| `responseType` | `FetchAuthorizationUrlResponseTypeEnum` |     ✅    | -           |

## Response

Returns a `RequestArgs` object.

## Error Handling

```ts theme={"system"}
try {
  const res = await client.fetchAuthorizationUrl({
    clientId: "example",
    responseType: "value"
  });
  // use res
} catch (err) {
  // Axios/HTTP errors, invalid params, auth issues, etc.
  console.error(err);
}
```

## Related API Reference

📖 **API Reference:** [fetchAuthorizationUrl](/reference/fetch-authorization-url)

For detailed information about the HTTP endpoint, request/response schemas, and additional examples, see the complete API documentation.

## Tips

* Provide a **viewerFid** when supported to respect mutes/blocks and include `viewer_context`.
* Keep requests scoped (e.g., use `limit`) to improve latency.
* Cache results where sensible.


## Related topics

- [SDK v1 to v2 migration guide](/reference/neynar-nodejs-sdk-v1-to-v2-migration-guide.md)
- [Fetch authorization url](/reference/fetch-authorization-url.md)
- [SIWN: React Native](/docs/sign-in-with-neynar-react-native-implementation.md)
- [quickAuth.fetch](/miniapps/sdk/quick-auth/fetch.md)
- [Quick Auth](/miniapps/sdk/quick-auth.md)