# List callback — GET /v1/provider/{provider}/callback

URL: https://docs.hanzo.ai/docs/openapi/provider/get-provider-by-provider-callback

> The single address every connector's OAuth flow returns to.

`GET /v1/provider/{provider}/callback`

> [Provider →](https://docs.hanzo.ai/docs/openapi/provider) · [All API references →](https://docs.hanzo.ai/docs/openapi) · [Get started →](https://docs.hanzo.ai/docs/guides)

|               |                                                        |
| ------------- | ------------------------------------------------------ |
| **Address**   | `https://api.hanzo.ai/v1/provider/{provider}/callback` |
| **Method**    | `GET`                                                  |
| **Operation** | `get_provider_by_provider_callback`                    |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`                 |

The single address every connector's OAuth flow returns to. It exchanges the authorization the provider granted, records the connection, and ALWAYS redirects the browser back to the console — on success and on every labeled failure alike, so a user never lands on a raw JSON dead end.

It is public and carries no principal, so the org is taken ONLY from the signed state minted when the flow began; no header is trusted here. That state is single-use and is burned BEFORE the exchange, so one authorization is one attempt and a replayed return fails instead of exchanging twice.

Tokens are sealed into the org's KMS namespace BEFORE the connection row is written, so a failure of the secret store leaves no half-connected integration advertising a credential that was never stored. Token values never appear in the redirect, in a log line or in an error.

One generalization is worth knowing: a GitHub App installation returns an installation identifier instead of an OAuth code, and it is accepted in the code's place so the App model needs no second address.

## Request

1 field.

| Field      | In   | Type   | Required | Description |
| ---------- | ---- | ------ | -------- | ----------- |
| `provider` | path | string | yes      |             |

## Response

The document declares no response body for this operation. It answers `200` on success and the platform error shape on failure — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo provider callback <provider>
```

**SDK**

**.ts**

```ts
import { Configuration, ProviderApi } from 'hanzoai';

const api = new ProviderApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.getProviderByProviderCallback({ provider: 'provider' });
```

**.py**

```python
from hanzoai.cloud import ApiClient, Configuration
from hanzoai.cloud.api import ProviderApi

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = ProviderApi(client).get_provider_by_provider_callback(provider='provider')
```

**.go**

```go
cfg := hanzoai.NewConfiguration()
cfg.AddDefaultHeader("Authorization", "Bearer "+os.Getenv("HANZO_API_KEY"))
client := hanzoai.NewAPIClient(cfg)

resp, _, err := client.ProviderAPI.GetProviderByProviderCallback(context.Background()).Execute()
if err != nil {
	return err
}
```

**.rs**

```rust
use hanzo_client::apis::{configuration::Configuration, provider_api};

let mut cfg = Configuration::new();
cfg.bearer_access_token = std::env::var("HANZO_API_KEY").ok();

let result = provider_api::get_provider_by_provider_callback(&cfg, Default::default()).await?;
```

**.java**

```java
import ai.hanzo.cloud.ApiClient;
import ai.hanzo.cloud.api.ProviderApi;

ApiClient client = new ApiClient();
client.setBearerToken(System.getenv("HANZO_API_KEY"));

var result = new ProviderApi(client).getProviderByProviderCallback();
```

**HTTP**

```bash
curl https://api.hanzo.ai/v1/provider/<provider>/callback \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

MCP reaches **provider** through the `provider` tool, which names its 38 operations with its own verbs — this one among them, under a name only MCP declares. `describe` explains any of them:

```bash
curl -X POST https://api.hanzo.ai/v1/mcp \
  -H "Content-Type: application/json" \
  -d '{
       "jsonrpc": "2.0",
       "id": 1,
       "method": "tools/call",
       "params": {
         "name": "describe",
         "arguments": {
           "op": "list_connections"
         }
       }
     }'
```

---

[Provider API](https://docs.hanzo.ai/docs/openapi/provider) · [All Hanzo APIs](https://docs.hanzo.ai/docs/openapi) · [Interactive reference](https://docs.hanzo.ai/docs/openapi/reference)