> ## Documentation Index
> Fetch the complete documentation index at: https://docs.mygigsters.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Submit contribution (async)

> Async version of POST /v1/contributions/contribution for larger batches. The request body is **identical** to v1 — only the response and the limits differ. See the Async Submission (v2) guide for the full flow, statuses and...

* The whole request is validated **before** we respond (payload, employer onboarding, every employee, MVR payment gate, active USIs). If anything is wrong you get a `400` listing **every** error and nothing is stored.
* A valid request returns `202 Accepted` with a `transactionId` straight away. The submission to the clearing house happens in the background as **one** transaction (one direct debit).
* The outcome arrives via the `contribution.submission_completed` webhook, or poll `GET /v2/contributions/:transactionId`.

### Idempotency-Key (required)

Send a unique `Idempotency-Key` header with every new submission and **reuse it when retrying the same submission** (e.g. after a timeout or network error).

| Situation | Result |
| - | - |
| Same key + same body | `202` with the original `transactionId` (and its current status) — nothing is submitted twice |
| Same key + different body | `409 Conflict` |
| Header missing | `400` |

Keys are scoped to your client and never expire.

### Limits

**100 funds / 1000 members** per request (v1: 8 funds / 40 members).

### Request Parameters

**Idempotency-Key** `string` *required*

Your unique key for this submission (e.g. a UUID, or your own pay-run ID). Reuse it when retrying the same request; use a new one for a new submission.

### Request Body

**employerId** `string` *required*

Employer ID that this contribution belongs to. The employer must be associated with the authenticated client.

**contributionDetails** `object` *required*

Simplified contribution details. Only variable data (fund USIs, amounts, pay periods) is required. Employee and employer static data will be automatically retrieved from the database.

### Responses

| Code | Description |
| - | - |
| `202` | Accepted — the request passed validation and is queued for background submission. Also returned when the same Idempotency-Key and body are resent (with the submission's current status). |
| `400` | Validation failed — nothing was stored. Business-rule errors (employer, employees, MVR gate, USIs, limits) are listed together in `errors`, each with the path of the offending field. Field-format errors (e.g. a missing amount) and a missing Idempotency-Key are reported in `message`, as in v1. |
| `401` | Unauthorized — invalid authentication credentials |
| `403` | The employerId does not belong to your client account |
| `409` | The Idempotency-Key was already used with a different request body |

### Response fields

**transactionId** `string`

The SuperChoice transaction ID for this submission. It is used everywhere afterwards: GET /v2/contributions/:transactionId, payment status endpoints and payment.status\_changed webhooks.

**employerId** `string`

**status** `string`

ACCEPTED on a new submission. A replay returns the submission's current status.

**totals** `object`

Totals calculated from the request body

**properties**

**funds** `integer`

Number of entries in contributionDetails.funds

**members** `integer`

Total members across all funds

**amount** `string`

Sum of every fund's amountForFund.value, as a 2-decimal string

> [accordion] Error response fields
>
> **success** `boolean`
>
> **statusCode** `integer`
>
> **message** `string`
>
> **errors** `array`
>
> Every validation error found, each as \{ path, message }

```bash cURL theme={null}
curl 'https://qa-super.mygigsters.com.au/v2/contributions' -X POST \
    -u "apiUsername:apiPassword" \
    -H "Idempotency-Key: payrun-2026-10-27-001"  \
    -H "Content-Type: application/json" --data '{"employerId":"6960d86e466f44ab3f163c66","contributionDetails":{"funds":[{"usi":"40328908469310","amountForFund":{"value":1391.67,"currency":"AUD"},"members":[{"employeeId":"507f1f77bcf86cd799439011","payPeriodStartDate":1638277200000,"payPeriodEndDate":1640955600000,"employmentStatus":"FULL_TIME","totalMemberContributionAmount":{"value":1391.67,"currency":"AUD"},"superGuaranteeAmount":{"value":1391.67,"currency":"AUD"}}]}]}}'
```

```javascript Node.js theme={null}
const response = await fetch("https://qa-super.mygigsters.com.au/v2/contributions", {
  method: "POST",
  headers: {
    Authorization: "Basic " + Buffer.from("apiUsername:apiPassword").toString("base64"),
    "Idempotency-Key": "payrun-2026-10-27-001",
    "Content-Type": "application/json",
  },
  body: JSON.stringify({
    "employerId": "6960d86e466f44ab3f163c66",
    "contributionDetails": {
      "funds": [
        {
          "usi": "40328908469310",
          "amountForFund": {
            "value": 1391.67,
            "currency": "AUD"
          },
          "members": [
            {
              "employeeId": "507f1f77bcf86cd799439011",
              "payPeriodStartDate": 1638277200000,
              "payPeriodEndDate": 1640955600000,
              "employmentStatus": "FULL_TIME",
              "totalMemberContributionAmount": {
                "value": 1391.67,
                "currency": "AUD"
              },
              "superGuaranteeAmount": {
                "value": 1391.67,
                "currency": "AUD"
              }
            }
          ]
        }
      ]
    }
  }),
});

const data = await response.json();
console.log(data);
```

```python Python theme={null}
import requests

response = requests.post(
    "https://qa-super.mygigsters.com.au/v2/contributions",
    auth=("apiUsername", "apiPassword"),
    headers={
        "Idempotency-Key": "payrun-2026-10-27-001",
    },
    json={
        "employerId": "6960d86e466f44ab3f163c66",
        "contributionDetails": {
            "funds": [
                {
                    "usi": "40328908469310",
                    "amountForFund": {
                        "value": 1391.67,
                        "currency": "AUD",
                    },
                    "members": [
                        {
                            "employeeId": "507f1f77bcf86cd799439011",
                            "payPeriodStartDate": 1638277200000,
                            "payPeriodEndDate": 1640955600000,
                            "employmentStatus": "FULL_TIME",
                            "totalMemberContributionAmount": {
                                "value": 1391.67,
                                "currency": "AUD",
                            },
                            "superGuaranteeAmount": {
                                "value": 1391.67,
                                "currency": "AUD",
                            },
                        },
                    ],
                },
            ],
        },
    },
)

print(response.json())
```

```ruby Ruby theme={null}
require "net/http"
require "json"
require "uri"

uri = URI("https://qa-super.mygigsters.com.au/v2/contributions")
request = Net::HTTP::Post.new(uri)
request.basic_auth("apiUsername", "apiPassword")
request["Idempotency-Key"] = "payrun-2026-10-27-001"
request["Content-Type"] = "application/json"
request.body = <<~JSON
  {
    "employerId": "6960d86e466f44ab3f163c66",
    "contributionDetails": {
      "funds": [
        {
          "usi": "40328908469310",
          "amountForFund": {
            "value": 1391.67,
            "currency": "AUD"
          },
          "members": [
            {
              "employeeId": "507f1f77bcf86cd799439011",
              "payPeriodStartDate": 1638277200000,
              "payPeriodEndDate": 1640955600000,
              "employmentStatus": "FULL_TIME",
              "totalMemberContributionAmount": {
                "value": 1391.67,
                "currency": "AUD"
              },
              "superGuaranteeAmount": {
                "value": 1391.67,
                "currency": "AUD"
              }
            }
          ]
        }
      ]
    }
  }
JSON

response = Net::HTTP.start(uri.hostname, uri.port, use_ssl: true) do |http|
  http.request(request)
end

puts JSON.parse(response.body)
```

```php PHP theme={null}
<?php

$ch = curl_init("https://qa-super.mygigsters.com.au/v2/contributions");

curl_setopt_array($ch, [
    CURLOPT_RETURNTRANSFER => true,
    CURLOPT_CUSTOMREQUEST => "POST",
    CURLOPT_USERPWD => "apiUsername:apiPassword",
    CURLOPT_HTTPHEADER => [
        "Idempotency-Key: payrun-2026-10-27-001",
        "Content-Type: application/json",
    ],
    CURLOPT_POSTFIELDS => <<<'JSON'
{
  "employerId": "6960d86e466f44ab3f163c66",
  "contributionDetails": {
    "funds": [
      {
        "usi": "40328908469310",
        "amountForFund": {
          "value": 1391.67,
          "currency": "AUD"
        },
        "members": [
          {
            "employeeId": "507f1f77bcf86cd799439011",
            "payPeriodStartDate": 1638277200000,
            "payPeriodEndDate": 1640955600000,
            "employmentStatus": "FULL_TIME",
            "totalMemberContributionAmount": {
              "value": 1391.67,
              "currency": "AUD"
            },
            "superGuaranteeAmount": {
              "value": 1391.67,
              "currency": "AUD"
            }
          }
        ]
      }
    ]
  }
}
JSON,
]);

$response = curl_exec($ch);
curl_close($ch);

print_r(json_decode($response, true));
```

```java Java theme={null}
import java.net.URI;
import java.net.http.HttpClient;
import java.net.http.HttpRequest;
import java.net.http.HttpResponse;
import java.util.Base64;

public class Example {
    public static void main(String[] args) throws Exception {
        String credentials = Base64.getEncoder()
            .encodeToString("apiUsername:apiPassword".getBytes());

        String body = String.join("\n",
            "{",
            "  \"employerId\": \"6960d86e466f44ab3f163c66\",",
            "  \"contributionDetails\": {",
            "    \"funds\": [",
            "      {",
            "        \"usi\": \"40328908469310\",",
            "        \"amountForFund\": {",
            "          \"value\": 1391.67,",
            "          \"currency\": \"AUD\"",
            "        },",
            "        \"members\": [",
            "          {",
            "            \"employeeId\": \"507f1f77bcf86cd799439011\",",
            "            \"payPeriodStartDate\": 1638277200000,",
            "            \"payPeriodEndDate\": 1640955600000,",
            "            \"employmentStatus\": \"FULL_TIME\",",
            "            \"totalMemberContributionAmount\": {",
            "              \"value\": 1391.67,",
            "              \"currency\": \"AUD\"",
            "            },",
            "            \"superGuaranteeAmount\": {",
            "              \"value\": 1391.67,",
            "              \"currency\": \"AUD\"",
            "            }",
            "          }",
            "        ]",
            "      }",
            "    ]",
            "  }",
            "}"
        );

        HttpRequest request = HttpRequest.newBuilder()
            .uri(URI.create("https://qa-super.mygigsters.com.au/v2/contributions"))
            .header("Authorization", "Basic " + credentials)
            .header("Idempotency-Key", "payrun-2026-10-27-001")
            .header("Content-Type", "application/json")
            .method("POST", HttpRequest.BodyPublishers.ofString(body))
            .build();

        HttpResponse<String> response = HttpClient.newHttpClient()
            .send(request, HttpResponse.BodyHandlers.ofString());

        System.out.println(response.body());
    }
}
```

```go Go theme={null}
package main

import (
	"fmt"
	"io"
	"net/http"
	"strings"
)

func main() {
	body := strings.NewReader(`{
  "employerId": "6960d86e466f44ab3f163c66",
  "contributionDetails": {
    "funds": [
      {
        "usi": "40328908469310",
        "amountForFund": {
          "value": 1391.67,
          "currency": "AUD"
        },
        "members": [
          {
            "employeeId": "507f1f77bcf86cd799439011",
            "payPeriodStartDate": 1638277200000,
            "payPeriodEndDate": 1640955600000,
            "employmentStatus": "FULL_TIME",
            "totalMemberContributionAmount": {
              "value": 1391.67,
              "currency": "AUD"
            },
            "superGuaranteeAmount": {
              "value": 1391.67,
              "currency": "AUD"
            }
          }
        ]
      }
    ]
  }
}`)

	req, err := http.NewRequest("POST", "https://qa-super.mygigsters.com.au/v2/contributions", body)
	if err != nil {
		panic(err)
	}
	req.SetBasicAuth("apiUsername", "apiPassword")
	req.Header.Set("Idempotency-Key", "payrun-2026-10-27-001")
	req.Header.Set("Content-Type", "application/json")

	res, err := http.DefaultClient.Do(req)
	if err != nil {
		panic(err)
	}
	defer res.Body.Close()

	data, _ := io.ReadAll(res.Body)
	fmt.Println(string(data))
}
```

```csharp .NET theme={null}
using System.Net.Http.Headers;
using System.Text;

using var client = new HttpClient();

var request = new HttpRequestMessage(HttpMethod.Post, "https://qa-super.mygigsters.com.au/v2/contributions");
request.Headers.Authorization = new AuthenticationHeaderValue(
    "Basic", Convert.ToBase64String(Encoding.UTF8.GetBytes("apiUsername:apiPassword")));
request.Headers.Add("Idempotency-Key", "payrun-2026-10-27-001");
request.Content = new StringContent(@"{
  ""employerId"": ""6960d86e466f44ab3f163c66"",
  ""contributionDetails"": {
    ""funds"": [
      {
        ""usi"": ""40328908469310"",
        ""amountForFund"": {
          ""value"": 1391.67,
          ""currency"": ""AUD""
        },
        ""members"": [
          {
            ""employeeId"": ""507f1f77bcf86cd799439011"",
            ""payPeriodStartDate"": 1638277200000,
            ""payPeriodEndDate"": 1640955600000,
            ""employmentStatus"": ""FULL_TIME"",
            ""totalMemberContributionAmount"": {
              ""value"": 1391.67,
              ""currency"": ""AUD""
            },
            ""superGuaranteeAmount"": {
              ""value"": 1391.67,
              ""currency"": ""AUD""
            }
          }
        ]
      }
    ]
  }
}", Encoding.UTF8, "application/json");

var response = await client.SendAsync(request);
Console.WriteLine(await response.Content.ReadAsStringAsync());
```

```json 202 theme={null}
{
  "transactionId": "txn-3cb85051-09cd-4a04-9952-100b20384ada",
  "employerId": "6960d86e466f44ab3f163c66",
  "status": "ACCEPTED",
  "totals": {
    "funds": 2,
    "members": 3,
    "amount": "3.00"
  }
}
```


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