curl --request POST \
  --url https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/ \
  --header 'Content-Type: application/json' \
  --data '
{
  "transaction_match_id": 123,
  "transactions": [
    {
      "amount": 0,
      "transaction_match_id": 123,
      "transaction_id": 123,
      "transaction_ids": [
        123
      ],
      "account_id": 123,
      "amount_payable": 0,
      "credit_account_id": 123,
      "writeoff_account_id": 123,
      "withholding_amount": 0,
      "withholding_tax_rate_id": 123
    }
  ],
  "credit_memos": [
    {
      "credit_memo_id": 123,
      "amount": 0,
      "posted_at": "2023-12-25"
    }
  ],
  "debit_memos": [
    {
      "debit_memo_id": 123,
      "amount": 0,
      "posted_at": "2023-12-25"
    }
  ],
  "empty_transactions": [
    {
      "account_id": 123,
      "account_name": "<string>",
      "amount": 0,
      "payment_date": "2023-12-25",
      "department_id": 123,
      "tag_ids": [
        123
      ],
      "memo": "<string>",
      "external_id": "<string>",
      "currency": "<string>",
      "amount_in_invoice_currency": 0,
      "amount_in_bill_currency": 0,
      "withholding_amount": 0,
      "withholding_tax_rate_id": 123
    }
  ]
}
'

import requests

url = "https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/"

payload = {
    "transaction_match_id": 123,
    "transactions": [
        {
            "amount": 0,
            "transaction_match_id": 123,
            "transaction_id": 123,
            "transaction_ids": [123],
            "account_id": 123,
            "amount_payable": 0,
            "credit_account_id": 123,
            "writeoff_account_id": 123,
            "withholding_amount": 0,
            "withholding_tax_rate_id": 123
        }
    ],
    "credit_memos": [
        {
            "credit_memo_id": 123,
            "amount": 0,
            "posted_at": "2023-12-25"
        }
    ],
    "debit_memos": [
        {
            "debit_memo_id": 123,
            "amount": 0,
            "posted_at": "2023-12-25"
        }
    ],
    "empty_transactions": [
        {
            "account_id": 123,
            "account_name": "<string>",
            "amount": 0,
            "payment_date": "2023-12-25",
            "department_id": 123,
            "tag_ids": [123],
            "memo": "<string>",
            "external_id": "<string>",
            "currency": "<string>",
            "amount_in_invoice_currency": 0,
            "amount_in_bill_currency": 0,
            "withholding_amount": 0,
            "withholding_tax_rate_id": 123
        }
    ]
}
headers = {"Content-Type": "application/json"}

response = requests.post(url, json=payload, headers=headers)

print(response.text)

const options = {
  method: 'POST',
  headers: {'Content-Type': 'application/json'},
  body: JSON.stringify({
    transaction_match_id: 123,
    transactions: [
      {
        amount: 0,
        transaction_match_id: 123,
        transaction_id: 123,
        transaction_ids: [123],
        account_id: 123,
        amount_payable: 0,
        credit_account_id: 123,
        writeoff_account_id: 123,
        withholding_amount: 0,
        withholding_tax_rate_id: 123
      }
    ],
    credit_memos: [{credit_memo_id: 123, amount: 0, posted_at: '2023-12-25'}],
    debit_memos: [{debit_memo_id: 123, amount: 0, posted_at: '2023-12-25'}],
    empty_transactions: [
      {
        account_id: 123,
        account_name: '<string>',
        amount: 0,
        payment_date: '2023-12-25',
        department_id: 123,
        tag_ids: [123],
        memo: '<string>',
        external_id: '<string>',
        currency: '<string>',
        amount_in_invoice_currency: 0,
        amount_in_bill_currency: 0,
        withholding_amount: 0,
        withholding_tax_rate_id: 123
      }
    ]
  })
};

fetch('https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

<?php

$curl = curl_init();

curl_setopt_array($curl, [
  CURLOPT_URL => "https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/",
  CURLOPT_RETURNTRANSFER => true,
  CURLOPT_ENCODING => "",
  CURLOPT_MAXREDIRS => 10,
  CURLOPT_TIMEOUT => 30,
  CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
  CURLOPT_CUSTOMREQUEST => "POST",
  CURLOPT_POSTFIELDS => json_encode([
    'transaction_match_id' => 123,
    'transactions' => [
        [
                'amount' => 0,
                'transaction_match_id' => 123,
                'transaction_id' => 123,
                'transaction_ids' => [
                                123
                ],
                'account_id' => 123,
                'amount_payable' => 0,
                'credit_account_id' => 123,
                'writeoff_account_id' => 123,
                'withholding_amount' => 0,
                'withholding_tax_rate_id' => 123
        ]
    ],
    'credit_memos' => [
        [
                'credit_memo_id' => 123,
                'amount' => 0,
                'posted_at' => '2023-12-25'
        ]
    ],
    'debit_memos' => [
        [
                'debit_memo_id' => 123,
                'amount' => 0,
                'posted_at' => '2023-12-25'
        ]
    ],
    'empty_transactions' => [
        [
                'account_id' => 123,
                'account_name' => '<string>',
                'amount' => 0,
                'payment_date' => '2023-12-25',
                'department_id' => 123,
                'tag_ids' => [
                                123
                ],
                'memo' => '<string>',
                'external_id' => '<string>',
                'currency' => '<string>',
                'amount_in_invoice_currency' => 0,
                'amount_in_bill_currency' => 0,
                'withholding_amount' => 0,
                'withholding_tax_rate_id' => 123
        ]
    ]
  ]),
  CURLOPT_HTTPHEADER => [
    "Content-Type: application/json"
  ],
]);

$response = curl_exec($curl);
$err = curl_error($curl);

curl_close($curl);

if ($err) {
  echo "cURL Error #:" . $err;
} else {
  echo $response;
}

package main

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

func main() {

	url := "https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/"

	payload := strings.NewReader("{\n  \"transaction_match_id\": 123,\n  \"transactions\": [\n    {\n      \"amount\": 0,\n      \"transaction_match_id\": 123,\n      \"transaction_id\": 123,\n      \"transaction_ids\": [\n        123\n      ],\n      \"account_id\": 123,\n      \"amount_payable\": 0,\n      \"credit_account_id\": 123,\n      \"writeoff_account_id\": 123,\n      \"withholding_amount\": 0,\n      \"withholding_tax_rate_id\": 123\n    }\n  ],\n  \"credit_memos\": [\n    {\n      \"credit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"debit_memos\": [\n    {\n      \"debit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"empty_transactions\": [\n    {\n      \"account_id\": 123,\n      \"account_name\": \"<string>\",\n      \"amount\": 0,\n      \"payment_date\": \"2023-12-25\",\n      \"department_id\": 123,\n      \"tag_ids\": [\n        123\n      ],\n      \"memo\": \"<string>\",\n      \"external_id\": \"<string>\",\n      \"currency\": \"<string>\",\n      \"amount_in_invoice_currency\": 0,\n      \"amount_in_bill_currency\": 0,\n      \"withholding_amount\": 0,\n      \"withholding_tax_rate_id\": 123\n    }\n  ]\n}")

	req, _ := http.NewRequest("POST", url, payload)

	req.Header.Add("Content-Type", "application/json")

	res, _ := http.DefaultClient.Do(req)

	defer res.Body.Close()
	body, _ := io.ReadAll(res.Body)

	fmt.Println(string(body))

}

HttpResponse<String> response = Unirest.post("https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/")
  .header("Content-Type", "application/json")
  .body("{\n  \"transaction_match_id\": 123,\n  \"transactions\": [\n    {\n      \"amount\": 0,\n      \"transaction_match_id\": 123,\n      \"transaction_id\": 123,\n      \"transaction_ids\": [\n        123\n      ],\n      \"account_id\": 123,\n      \"amount_payable\": 0,\n      \"credit_account_id\": 123,\n      \"writeoff_account_id\": 123,\n      \"withholding_amount\": 0,\n      \"withholding_tax_rate_id\": 123\n    }\n  ],\n  \"credit_memos\": [\n    {\n      \"credit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"debit_memos\": [\n    {\n      \"debit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"empty_transactions\": [\n    {\n      \"account_id\": 123,\n      \"account_name\": \"<string>\",\n      \"amount\": 0,\n      \"payment_date\": \"2023-12-25\",\n      \"department_id\": 123,\n      \"tag_ids\": [\n        123\n      ],\n      \"memo\": \"<string>\",\n      \"external_id\": \"<string>\",\n      \"currency\": \"<string>\",\n      \"amount_in_invoice_currency\": 0,\n      \"amount_in_bill_currency\": 0,\n      \"withholding_amount\": 0,\n      \"withholding_tax_rate_id\": 123\n    }\n  ]\n}")
  .asString();

require 'uri'
require 'net/http'

url = URI("https://api.meetcampfire.com/coa/api/v1/bill/{bill_id}/pay/")

http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true

request = Net::HTTP::Post.new(url)
request["Content-Type"] = 'application/json'
request.body = "{\n  \"transaction_match_id\": 123,\n  \"transactions\": [\n    {\n      \"amount\": 0,\n      \"transaction_match_id\": 123,\n      \"transaction_id\": 123,\n      \"transaction_ids\": [\n        123\n      ],\n      \"account_id\": 123,\n      \"amount_payable\": 0,\n      \"credit_account_id\": 123,\n      \"writeoff_account_id\": 123,\n      \"withholding_amount\": 0,\n      \"withholding_tax_rate_id\": 123\n    }\n  ],\n  \"credit_memos\": [\n    {\n      \"credit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"debit_memos\": [\n    {\n      \"debit_memo_id\": 123,\n      \"amount\": 0,\n      \"posted_at\": \"2023-12-25\"\n    }\n  ],\n  \"empty_transactions\": [\n    {\n      \"account_id\": 123,\n      \"account_name\": \"<string>\",\n      \"amount\": 0,\n      \"payment_date\": \"2023-12-25\",\n      \"department_id\": 123,\n      \"tag_ids\": [\n        123\n      ],\n      \"memo\": \"<string>\",\n      \"external_id\": \"<string>\",\n      \"currency\": \"<string>\",\n      \"amount_in_invoice_currency\": 0,\n      \"amount_in_bill_currency\": 0,\n      \"withholding_amount\": 0,\n      \"withholding_tax_rate_id\": 123\n    }\n  ]\n}"

response = http.request(request)
puts response.read_body

{
  "id": 123,
  "lines": [
    {
      "account_number": "<string>",
      "account_name": "<string>",
      "department_name": "<string>",
      "department_code": "<string>",
      "bill_customer_name": "<string>",
      "tags": [
        {}
      ],
      "amortization_schedule": [
        {
          "journal_entry_order": "<string>",
          "date": "2023-12-25",
          "amount": 0,
          "customer": 123,
          "id": 123,
          "posted": true,
          "transaction": 123,
          "bill_line": 123,
          "debit_memo_line": 123,
          "journal_entry": 123
        }
      ],
      "tax_rate_name": "<string>",
      "tax_rate_value": 0,
      "tag_ids": [
        0
      ],
      "tag_group_ids": [
        0
      ],
      "created_at": "2023-11-07T05:31:56Z",
      "last_modified_at": "2023-11-07T05:31:56Z",
      "customer": 123,
      "account": 123,
      "id": 123,
      "description": "<string>",
      "amount": 0,
      "tax": 0,
      "tax_description": "<string>",
      "source": "<string>",
      "source_id": "<string>",
      "currency": "<string>",
      "tax_rate": 123,
      "bill_customer": 123,
      "department": 123
    }
  ],
  "payments": [
    {
      "id": 123,
      "payment_transaction_bank_description": "<string>",
      "payment_journal_entry_order": "<string>",
      "voided_journal_entry_order": "<string>",
      "withheld_amount": 123,
      "applied_debit_memo": {},
      "created_at": "2023-11-07T05:31:56Z",
      "last_modified_at": "2023-11-07T05:31:56Z",
      "customer": 123,
      "bill": 123,
      "payment_journal_entry": 123,
      "currency": "<string>",
      "amount": 0,
      "payment_date": "2023-12-25",
      "source": "<string>",
      "source_id": "<string>",
      "voided_date": "2023-12-25",
      "payment_transaction": 123,
      "voided_journal_entry": 123
    }
  ],
  "payment_journal_entries": [
    123
  ],
  "status": "<string>",
  "past_due_days": 123,
  "entity_name": "<string>",
  "entity_currency": "<string>",
  "vendor_name": "<string>",
  "vendor_campfire_id": "<string>",
  "ap_account_name": "<string>",
  "attachments": [
    {
      "id": 123,
      "customer": 123,
      "created_at": "2023-11-07T05:31:56Z",
      "created_by": 123,
      "created_by_name": "<string>",
      "created_by_email": "<string>",
      "last_modified_at": "2023-11-07T05:31:56Z",
      "name": "<string>",
      "url": "<string>",
      "s3_path": "<string>",
      "app": "<string>",
      "model": "<string>",
      "is_deleted": false,
      "deleted_at": "2023-11-07T05:31:56Z",
      "s3_content_type": "<string>",
      "s3_content_length": 1073741823,
      "object_id": 1073741823
    }
  ],
  "total_amount": 0,
  "amount_due": 123,
  "amount_paid": 0,
  "voided_date": "2023-12-25",
  "voided_journal_entry_order": "<string>",
  "amortizations": "<string>",
  "last_modified_at": "2023-11-07T05:31:56Z",
  "ramp_use_sandbox": "<string>",
  "navan_region": "<string>",
  "zip_metadata": "<string>",
  "is_deleted": false,
  "deleted_at": "2023-11-07T05:31:56Z",
  "payment_term_name": "<string>",
  "withholding_info": {},
  "search_vector": "<string>",
  "search_text": "<string>",
  "bill_number": "<string>",
  "bill_date": "2023-12-25",
  "due_date": "2023-12-25",
  "created_at": "2023-11-07T05:31:56Z",
  "customer": 123,
  "entity": 123,
  "vendor": 123,
  "item_date": "2023-12-25",
  "mailing_address": "<string>",
  "terms": "custom",
  "paid_date": "2023-12-25",
  "message_on_bill": "<string>",
  "ita_allocation_number": "<string>",
  "ita_bill_type": "other",
  "source_id": "<string>",
  "source": "<string>",
  "source_bill_data": null,
  "external_ramp_id": "<string>",
  "payment_status": "partial",
  "currency": "<string>",
  "exchange_rate": 0,
  "exchange_rate_book": 0,
  "tax_behavior": "inclusive",
  "bill_type": "BILL",
  "chat_id": -1,
  "payment_term": 123,
  "journal_entry": 123,
  "source_file": 123,
  "tax_rate": 123,
  "ap_account": 123,
  "voided_journal_entry": 123
}