# Customer routes: activate, exempt

URL: /code/api/customer/verbs · Id: `page:code/api/customer/verbs`

> The Customer Verbs activate, exempt as api.sb routes, with inputs, result, refusals and an example.

Reference for [Customer](/business/nouns/customer), one group of [Customer routes](/code/api/customer).

### Customer.activate
Activate marks a Customer activated on an Offer once its declared activation Event reaches the count within the window. [Verb page](/business/nouns/customer/activate?interface=api).

```text
POST /{namespace}/customers/{customer}/activate
```

Path: `customer`. Body, as JSON: the other inputs. Emits [`Customer.activated`](/business/events/Customer.activated).

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `customer` | [Customer](/business/nouns/customer) | Yes | The Customer who crossed the line. |
| `offer` | [Offer](/business/nouns/offer) | Yes | The Offer whose `activation` was met. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `customer` | [Customer](/business/nouns/customer) | Yes | The activated Customer. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```bash
curl -X POST https://api.sb/leaseline.app/customers/cus_K1BROJhqzZ/activate \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"offer":"offer_2hzYe1ERo0"}'
```

```json
{
  "api": "https://api.sb/leaseline.app",
  "customer": {
    "$id": "https://api.sb/leaseline.app/customers/cus_K1BROJhqzZ",
    "$type": "Customer",
    "since": "2026-04-13T08:00:00Z"
  },
  "action": {
    "$id": "https://api.sb/leaseline.app/actions/act_br07HsG8MG",
    "operation": "Customer.activate",
    "status": "done"
  },
  "links": {
    "self": "https://api.sb/leaseline.app/actions/act_br07HsG8MG"
  }
}
```

### Customer.exempt
Exempt records a Customer’s exemption or resale certificate, verifies it, and stops tax on its Orders where the certificate applies. [Verb page](/business/nouns/customer/exempt?interface=api).

```text
POST /{namespace}/customers/{customer}/exempt
```

Path: `customer`. Body, as JSON: the other inputs. Emits [`Customer.exempted`](/business/events/Customer.exempted).

**Inputs**

| Input | Type | Required | Description |
| --- | --- | --- | --- |
| `customer` | [Customer](/business/nouns/customer) | Yes | The buying Customer. |
| `certificate` | [File](/business/nouns/file) | Yes | The certificate as uploaded through the Portal or received by email. |
| `jurisdictions` | `string[]` | Yes | Where the certificate applies, such as `US-TX`. |
| `expiresOn` | `date` | No | When the certificate lapses; empty when it does not. |

**Returns**

| Output | Type | Required | Description |
| --- | --- | --- | --- |
| `credential` | [Credential](/business/nouns/credential) | Yes | The certificate, held by the Customer’s Organization. |
| `customer` | [Customer](/business/nouns/customer) | Yes | The Customer, now exempt where the certificate applies. |

**Refuses when**

| Check | Error | Fix | Then call |
| --- | --- | --- | --- |
| The key is valid, but its scopes do not allow this operation. | [`forbidden`](/code/api/errors/forbidden) | Use a key whose scopes cover the operation, or ask an owner of the namespace to grant them. | None. |

**Example**

```bash
curl -X POST https://api.sb/leaseline.app/customers/cus_K1BROJhqzZ/exempt \
  -H "Authorization: Bearer $STARTUP_BUILDER_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{"certificate":"file_V1AuhyCTsH","jurisdictions":["US-TX"]}'
```

```json
{
  "api": "https://api.sb/leaseline.app",
  "credential": {
    "$id": "https://api.sb/leaseline.app/credentials/credential_Abb9zatRR1",
    "$type": "Credential",
    "issuer": "Example issuer",
    "jurisdiction": "US-DE"
  },
  "customer": {
    "$id": "https://api.sb/leaseline.app/customers/cus_K1BROJhqzZ",
    "$type": "Customer",
    "since": "2026-04-13T08:00:00Z"
  },
  "action": {
    "$id": "https://api.sb/leaseline.app/actions/act_br07HsG8MG",
    "operation": "Customer.exempt",
    "status": "done"
  },
  "links": {
    "self": "https://api.sb/leaseline.app/actions/act_br07HsG8MG"
  }
}
```