# Customer

**Kind:** interface  
**Defined in:** `packages/zappier/src/auth.ts`

## Fields

| Field | Type | Meaning |
|-------|------|---------|
| `id` | `string` | cust_… |
| `name` | `string` | Display |
| `tierId` | `string` | Matches TierConfig.id |
| `apiKey` | `string` | x-api-key value |
| `multiplierOverride` | `number?` | Beats tier multiplier |
| `email` | `string?` | Portal login |

## Who constructs it

CustomerRepo.findByApiKey / findById

## Who consumes it

`apiKeyAuth`, `portal`, `invoices`, `usage.summaryFor`

## Related modules

See `docs/modules/` for the functions that take these types as parameters and the values they return.