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

# Get API Access

> Choose the right Socket API endpoint for your integration.

Socket Swap V3 is available on three endpoints depending on your use case:

| Endpoint                                | Auth required    | Rate limit                  | Use case                    |
| --------------------------------------- | ---------------- | --------------------------- | --------------------------- |
| `https://public-backend.socket.tech`    | None             | Shared                      | Testing and prototyping     |
| `https://backend.socket.tech`           | Domain whitelist | Standard                    | Wallets, widgets, other UIs |
| `https://dedicated-backend.socket.tech` | API key          | 20 rps (100 rps enterprise) | Production backends         |

***

## Public endpoint

```
https://public-backend.socket.tech
```

No authentication required. Use this to try the API and test your integration before going to production.

```bash theme={null}
curl "https://public-backend.socket.tech/v3/swap/quote?userOps=tx&originChainId=42161&..."
```

***

## Backend endpoint (domain whitelisted)

```
https://backend.socket.tech
```

For wallets, widgets, and frontend UIs. Access is tied to your domain rather than an API key.
[Request access here](https://forms.gle/4rE4mEXbnKeVdCeq7).

Once set up, requests include your `affiliate` ID:

```bash theme={null}
curl "https://backend.socket.tech/v3/swap/quote?userOps=tx&originChainId=42161&..." \
  --header "affiliate: YOUR_AFFILIATE_ID"
```

***

## Dedicated endpoint (API key)

```
https://dedicated-backend.socket.tech
```

For production backend integrations that need guaranteed rate limits. Comes with 20 rps by default; enterprise customers get 100 rps.
[Request access here](https://forms.gle/4rE4mEXbnKeVdCeq7).

```bash theme={null}
curl "https://dedicated-backend.socket.tech/v3/swap/quote?userOps=tx&originChainId=42161&..." \
  --header "x-api-key: YOUR_API_KEY" \
  --header "affiliate: YOUR_AFFILIATE_ID"
```

<Warning>
  Keep your API key server-side. Never expose it in frontend code or client bundles.
</Warning>

***

## Server Request ID

All responses include a `server-req-id` header. Capture and include it when reporting issues to the Socket team — it lets us trace the exact request through the system.

```javascript theme={null}
const response = await fetch(url, { headers });
const serverReqId = response.headers.get("server-req-id");
```