> For the complete documentation index, see [llms.txt](https://docs.txn.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.txn.io/invoices/listing-invoice-currency-pairs.md).

# Listing invoice currency pairs

<mark style="color:green;">`GET`</mark> `/api/public/v1/invoices/currency_pairs`

Returns all available invoice currency pairs. Use this endpoint to discover which currencies (`billedCurrency`) can be used to denominate an invoice and which cryptocurrencies (`chargedCurrency`) the customer can pay with, along with the networks available for each. For the platform-wide lists of currencies and networks, see [Listing invoice currencies and networks](/invoices/listing-invoice-currencies-and-networks.md).

To construct a [Create Invoice](/invoices/creating-invoice.md) request from the response:

1. Choose a pair — `billedCurrency` gives you the `billedCurrency` parameter, `chargedCurrency` gives you the `chargedCurrency` parameter.
2. Find the `chargedCurrency` entry in `included` and follow its `networks` references.
3. Find the matching `network` objects in `included` — the `code` is the `network` value to use.

**Headers**

| Name          | Value                      |
| ------------- | -------------------------- |
| Content-Type  | `application/vnd.api+json` |
| Authorization | `Bearer <api_key>`         |

**cURL**

```bash
curl "https://api.sandbox.txn.io/api/public/v1/invoices/currency_pairs" \
     -H 'Content-Type: application/vnd.api+json' \
     -H 'Authorization: Bearer <api_key>'
```

**Response Body**

<table><thead><tr><th>Name</th><th width="96">Type</th><th>Description</th></tr></thead><tbody><tr><td>data[].id</td><td>string</td><td>Currency pair ID.</td></tr><tr><td>data[].type</td><td>string</td><td>Always <code>invoiceCurrencyPairs</code>.</td></tr><tr><td>data[].attributes.direction</td><td>string</td><td>Always <code>sell</code> — the platform sells the <code>chargedCurrency</code> received from the customer and settles the invoice in <code>billedCurrency</code>.</td></tr><tr><td>data[].attributes.enabled</td><td>boolean</td><td>Whether this pair is currently available for invoices.</td></tr><tr><td>data[].relationships.billedCurrency.data.id</td><td>string</td><td>Currency code of the invoice denomination. Use as the <code>billedCurrency</code> parameter in Create Invoice.</td></tr><tr><td>data[].relationships.chargedCurrency.data.id</td><td>string</td><td>Currency code of the cryptocurrency the customer pays with. Use as the <code>chargedCurrency</code> parameter in Create Invoice.</td></tr><tr><td>included[].type(currencies).attributes.code</td><td>string</td><td>Currency code.</td></tr><tr><td>included[].type(currencies).attributes.crypto</td><td>boolean</td><td><code>true</code> for cryptocurrencies, <code>false</code> for fiat.</td></tr><tr><td>included[].type(currencies).attributes.symbol</td><td>string</td><td>Display symbol for the currency.</td></tr><tr><td>included[].type(currencies).attributes.subunitToUnit</td><td>number</td><td>Number of smallest units in one whole unit (e.g. <code>100000000</code> for BTC, <code>100</code> for EUR).</td></tr><tr><td>included[].type(currencies).relationships.networks</td><td>array</td><td>Network references for this currency. Resolve against <code>network</code> objects in <code>included</code> to get the <code>network</code> codes.</td></tr><tr><td>included[].type(network).attributes.code</td><td>string</td><td>Network code. Use as the <code>network</code> parameter in Create Invoice.</td></tr><tr><td>included[].type(network).attributes.name</td><td>string</td><td>Human-readable network name.</td></tr><tr><td>included[].type(network).attributes.currencyCode</td><td>string</td><td>Currency code this network belongs to.</td></tr></tbody></table>

**Response**

{% tabs %}
{% tab title="HTTP 200" %}

```json
{
  "data": [
    {
      "id": "b5871e76-9609-4a54-af18-b8979a2e663e",
      "type": "invoiceCurrencyPairs",
      "attributes": {
        "direction": "sell",
        "enabled": true
      },
      "relationships": {
        "billedCurrency": {
          "data": { "type": "currencies", "id": "EUR" }
        },
        "chargedCurrency": {
          "data": { "type": "currencies", "id": "USDT" }
        }
      }
    },
    {
      "id": "d7a631bd-dd67-4d5f-a8ef-d50e1a5bbfca",
      "type": "invoiceCurrencyPairs",
      "attributes": {
        "direction": "sell",
        "enabled": true
      },
      "relationships": {
        "billedCurrency": {
          "data": { "type": "currencies", "id": "EUR" }
        },
        "chargedCurrency": {
          "data": { "type": "currencies", "id": "BTC" }
        }
      }
    }
  ],
  "included": [
    {
      "id": "EUR",
      "type": "currencies",
      "attributes": {
        "code": "EUR",
        "crypto": false,
        "symbol": "€",
        "subunitToUnit": 100
      },
      "relationships": {
        "networks": { "data": [] }
      }
    },
    {
      "id": "USDT",
      "type": "currencies",
      "attributes": {
        "code": "USDT",
        "crypto": true,
        "symbol": "₮",
        "subunitToUnit": 1000000
      },
      "relationships": {
        "networks": {
          "data": [
            { "type": "network", "id": "2cfea86d-f334-4bd2-99ac-e74281520c95" },
            { "type": "network", "id": "8ededca3-a1cd-4b46-8c3a-14915f706ab2" },
            { "type": "network", "id": "490f02d4-b09a-4486-a469-d10c2ea43638" },
            { "type": "network", "id": "927d49d4-f4b2-48dc-876d-ac375337ec2a" },
            { "type": "network", "id": "4a1ec40b-8656-437c-ae79-4dd5435b53a5" }
          ]
        }
      }
    },
    {
      "id": "BTC",
      "type": "currencies",
      "attributes": {
        "code": "BTC",
        "crypto": true,
        "symbol": "฿",
        "subunitToUnit": 100000000
      },
      "relationships": {
        "networks": {
          "data": [
            { "type": "network", "id": "c0369c57-da08-4c60-b5ee-63e1e43d5ae4" }
          ]
        }
      }
    },
    {
      "id": "2cfea86d-f334-4bd2-99ac-e74281520c95",
      "type": "network",
      "attributes": {
        "currencyCode": "USDT",
        "name": "Ethereum (ERC20)",
        "code": "hterc6dp"
      }
    },
    {
      "id": "8ededca3-a1cd-4b46-8c3a-14915f706ab2",
      "type": "network",
      "attributes": {
        "currencyCode": "USDT",
        "name": "Tron (TRC20)",
        "code": "ttrx:usdt"
      }
    },
    {
      "id": "490f02d4-b09a-4486-a469-d10c2ea43638",
      "type": "network",
      "attributes": {
        "currencyCode": "USDT",
        "name": "Polygon (ERC20)",
        "code": "tpolygon:usdt"
      }
    },
    {
      "id": "927d49d4-f4b2-48dc-876d-ac375337ec2a",
      "type": "network",
      "attributes": {
        "currencyCode": "USDT",
        "name": "Binance Smart Chain (BEP20)",
        "code": "tbsc:usdt"
      }
    },
    {
      "id": "4a1ec40b-8656-437c-ae79-4dd5435b53a5",
      "type": "network",
      "attributes": {
        "currencyCode": "USDT",
        "name": "Solana",
        "code": "tsol:usdt"
      }
    },
    {
      "id": "c0369c57-da08-4c60-b5ee-63e1e43d5ae4",
      "type": "network",
      "attributes": {
        "currencyCode": "BTC",
        "name": "Bitcoin",
        "code": "tbtc"
      }
    }
  ],
  "meta": {},
  "jsonapi": {
    "version": "1.0"
  }
}
```

{% endtab %}
{% endtabs %}


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