# List gateway

URL: https://docs.hanzo.ai/docs/openapi/billing/get-billing-crypto-gateway

> Answers the terms to sign a USDC top-up against, for an agent or a person paying from a wallet: the treasury to pay, the networks and USDC contracts, the EIP-712 domain and types, the limits, and a nonce issued to the caller.

`GET /v1/billing/crypto/gateway`

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

|               |                                                  |
| ------------- | ------------------------------------------------ |
| **Address**   | `https://api.hanzo.ai/v1/billing/crypto/gateway` |
| **Method**    | `GET`                                            |
| **Operation** | `get_billing_crypto_gateway`                     |
| **Auth**      | `Authorization: Bearer $HANZO_API_KEY`           |

Answers the terms to sign a USDC top-up against, for an agent or a person
paying from a wallet: the treasury to pay, the networks and USDC contracts,
the EIP-712 domain and types, the limits, and a nonce issued to the caller.

Sign TransferWithAuthorization {from, to: payTo, value, validAfter,
validBefore, nonce} under one network's domain, then POST it here with the
salt. The nonce is the caller's own: a payment signed against it credits the
caller and cannot be presented by anyone else.

A named handler, not a closure, so zipdoc can lift this prose into the registry.

## Request

`GET /v1/billing/crypto/gateway` takes no parameters and no body — the credential is the whole request.

## Response

| Status    | Body                 | Meaning |
| --------- | -------------------- | ------- |
| `200`     | billing.GatewayTerms | ok      |
| `default` | problem-details      | refused |

`200` body — 23 fields.

| Field                                | In   | Type                     | Always | Description |
| ------------------------------------ | ---- | ------------------------ | ------ | ----------- |
| `accepts`                            | body | billing.GatewayAccept\[] | —      |             |
| `accepts[].asset`                    | body | string                   | —      |             |
| `accepts[].decimals`                 | body | integer (int64)          | —      |             |
| `accepts[].domain`                   | body | billing.GatewayDomain    | —      |             |
| `accepts[].domain.chainId`           | body | integer (int64)          | —      |             |
| `accepts[].domain.name`              | body | string                   | —      |             |
| `accepts[].domain.verifyingContract` | body | string                   | —      |             |
| `accepts[].domain.version`           | body | string                   | —      |             |
| `accepts[].maxAmount`                | body | string                   | —      |             |
| `accepts[].minAmount`                | body | string                   | —      |             |
| `accepts[].minValiditySeconds`       | body | integer (int64)          | —      |             |
| `accepts[].network`                  | body | string                   | —      |             |
| `accepts[].symbol`                   | body | string                   | —      |             |
| `maxCents`                           | body | integer (int64)          | —      |             |
| `maxValiditySeconds`                 | body | integer (int64)          | —      |             |
| `minCents`                           | body | integer (int64)          | —      |             |
| `nonce`                              | body | string                   | —      |             |
| `payTo`                              | body | string                   | —      |             |
| `primaryType`                        | body | string                   | —      |             |
| `salt`                               | body | string                   | —      |             |
| `scheme`                             | body | string                   | —      |             |
| `types`                              | body | any                      | —      |             |
| `x402Version`                        | body | integer (int64)          | —      |             |

Failure carries the platform error shape — see [Errors](https://docs.hanzo.ai/docs/errors).

## Examples

**CLI**

```bash
hanzo billing crypto gateway list
```

**SDK**

**.ts**

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

const api = new BillingApi(new Configuration({ accessToken: process.env.HANZO_API_KEY }));
const { data } = await api.getBillingCryptoGateway();
```

**.py**

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

client = ApiClient(Configuration(access_token=os.environ["HANZO_API_KEY"]))
result = BillingApi(client).get_billing_crypto_gateway()
```

**.go**

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

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

**.rs**

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

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

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

**.java**

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

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

var result = new BillingApi(client).getBillingCryptoGateway();
```

The method above is the one at the current release of the document. `hanzoai@8.5.914` (npm) and `hanzoai@8.5.914` (PyPI) were generated from an earlier release, where this operation carried a different id, so it spells the method differently — regenerating the clients is what makes the two agree. [SDKs →](https://docs.hanzo.ai/docs/sdks)

**HTTP**

```bash
curl https://api.hanzo.ai/v1/billing/crypto/gateway \
  -H "Authorization: Bearer $HANZO_API_KEY"
```

**MCP**

Tool `billing`, op `get_billing_crypto_gateway` — POST the JSON-RPC envelope to `https://api.hanzo.ai/v1/mcp`.

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

---

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