Purchase Flow

Four-step flow to browse, reserve, and purchase tickets via the TTG API.

Browse Occurrences → Browse Inventory → Create Cart → Checkout

1. Browse Occurrences

GET /api/v3/events/{eventId}/occurrences

Returns dates with pricing summaries. fromPrice: null means sold out or off-sale — filter these out.

The discount fields (maxDiscountPercentage or maxDiscountAmount) represent the best available discount across all price points. They may come from a different price point than fromPrice.

2. Browse Inventory

GET /api/v3/events/{eventId}/occurrences/{occurrenceId}/inventory-items

Returns purchasable items. Use inventoryVariant._type to determine the type:

Pricing: sellPrice is the all-in price customers pay (fees included). listPrice appears only when a discount exists — display as strikethrough.

Example response (trimmed):

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{
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  "data": [
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    {
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      "id": "eyJzIjoiT1JDSC1BLTEwMSJ9",
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      "inventoryVariant": {
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        "_type": "AssignedSeat",
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        "id": "Orchestra-A-101",
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        "name": "Orchestra A 101",
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        "section": "Orchestra",
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        "row": "A",
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        "seat": "101"
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      },
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      "quantityAvailable": 1,
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      "priceOptions": [
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        {
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          "id": "eyJjIjoiRlVMTCJ9",
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          "category": { "name": "Adult" },
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          "listPrice": { "amount": 15000, "currency": "USD" },
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          "sellPrice": { "amount": 12500, "currency": "USD" }
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        }
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      ]
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    }
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  ]
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}

3. Create Cart

POST /api/v3/carts

Reserves inventory and starts a hold timer. All items must be from the same occurrence.

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{
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  "items": [
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    {
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      "occurrenceId": "123",
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      "inventoryItemId": "eyJzIjoiT1JDSC1BLTEwMSJ9",
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      "priceOptionId": "eyJjIjoiRlVMTCJ9",
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      "quantity": 1
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    }
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  ]
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}

The response includes expiresAt (UTC) — display a countdown. When the cart expires, inventory is released and GET /api/v3/carts/{cartId} returns 404. Create a new cart to continue.

To release held inventory early: DELETE /api/v3/carts/{cartId} (idempotent, returns 204).

4. Checkout

POST /api/v3/orders

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{
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  "cartId": "cart_001",
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  "expectedTotal": { "amount": 18500, "currency": "USD" },
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  "contact": {
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    "name": "John Smith",
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    "email": "john.smith@example.com",
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    "phone": "+12125550123"
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  }
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}

expectedTotal must match the cart total exactly. If prices changed, the server returns 409 — re-fetch the cart and confirm the new price with the customer.

On success, tickets are in items[].tickets[] — each with a barcode (value, format, optional imageUrl).

Receipt Rendering

Both cart and order responses include receiptLines[]. Render them in order — do not compute totals client-side.

Each line has sign: positive = charge, negative = credit/discount. All total.amount values are positive integers.

Common Errors

For the full error format and retry strategy, see Error Handling.