## Capabilities

`print_mail.snap_packs.retrieve_capabilities(SnapPackRetrieveCapabilitiesParams**kwargs)  -> SnapPackRetrieveCapabilitiesResponse`

**get** `/print-mail/v1/snap_packs/capabilities`

Provides sizes and mailing classes available for the destination.

### Parameters

- `return_country_code: str`

  The country code where mail may be returned to.

- `destination_country_code: Optional[str]`

  The country code of where the snap pack will be sent to.
  One of `mailingList` or `destinationCountryCode` must be supplied but
  not both.

- `mailing_list: Optional[str]`

  Sources destination countries from the provided mailing list.
  One of `mailingList` or `destinationCountryCode` must be supplied but
  not both.

### Returns

- `class SnapPackRetrieveCapabilitiesResponse: …`

  - `mailing_classes: List[Literal["first_class", "standard_class", "express", 23 more]]`

    - `"first_class"`

    - `"standard_class"`

    - `"express"`

    - `"certified"`

    - `"certified_return_receipt"`

    - `"registered"`

    - `"usps_first_class"`

    - `"usps_standard_class"`

    - `"usps_eddm"`

    - `"usps_express_2_day"`

    - `"usps_express_3_day"`

    - `"usps_first_class_certified"`

    - `"usps_first_class_certified_return_receipt"`

    - `"usps_first_class_registered"`

    - `"usps_express_3_day_signature_confirmation"`

    - `"usps_express_3_day_certified"`

    - `"usps_express_3_day_certified_return_receipt"`

    - `"ca_post_lettermail"`

    - `"ca_post_personalized"`

    - `"ca_post_neighbourhood_mail"`

    - `"ups_express_overnight"`

    - `"ups_express_2_day"`

    - `"ups_express_3_day"`

    - `"royal_mail_first_class"`

    - `"royal_mail_second_class"`

    - `"au_post_second_class"`

  - `sizes: List[Literal["8.5x11_bifold_v"]]`

    - `"8.5x11_bifold_v"`

### Example

```python
import os
from postgrid import PostGrid

client = PostGrid(
    print_mail_api_key=os.environ.get("POSTGRID_PRINT_MAIL_API_KEY"),  # This is the default and can be omitted
)
response = client.print_mail.snap_packs.retrieve_capabilities(
    return_country_code="returnCountryCode",
)
print(response.mailing_classes)
```

#### Response

```json
{
  "sizes": [
    "8.5x11_bifold_v"
  ],
  "mailingClasses": [
    "express",
    "usps_express_2_day"
  ]
}
```