ITMS API — POST /api/v1/transactions/{code}/refund

Create a refund linked to the original transaction (full or partial).

POST/api/v1/transactions/{code}/refund

Create a refund linked to the original transaction (full or partial).

Persistence: Persists a new refund transaction linked via parent_code; the original is never mutated beyond its status.
Auth: API key · scope transactions:write
Request: code (the refund's own code), optional lines [{number, amount}] for partial refunds, optional tax_date
Response: The refund transaction; the original moves to partially_refunded or refunded

Request template for this operation

Set ITMS_API_KEY to a key with the scope shown above. Use a sandbox key while developing. For cURL, set CODE_URLENCODED; JavaScript and Python URL-encode the corresponding raw environment values. Create request.json from this operation’s OpenAPI request schema for cURL, and set ITMS_REQUEST_BODY to that same JSON for JavaScript or Python. Do not copy production customer data into a sandbox request.

cURL

: "${CODE_URLENCODED:?Set CODE_URLENCODED to the URL-encoded code}"
curl --request POST \
  --url "${ITMS_BASE_URL:-https://prophit.ai}/api/v1/transactions/${CODE_URLENCODED}/refund" \
  --header "Authorization: Bearer ${ITMS_API_KEY}" \
  --header "Content-Type: application/json" \
  --data-binary @request.json

JavaScript (Node 18+)

const requiredEnv = (name) => {
  const value = process.env[name];
  if (!value) throw new Error(`Set ${name} before running this request.`);
  return value;
};
const requestBody = JSON.parse(requiredEnv("ITMS_REQUEST_BODY"));
const path = `/api/v1/transactions/${encodeURIComponent(requiredEnv("CODE"))}/refund`;
const response = await fetch(`${process.env.ITMS_BASE_URL ?? 'https://prophit.ai'}${path}`, {
  method: "POST",
  headers: {
    Authorization: `Bearer ${requiredEnv('ITMS_API_KEY')}`,
    "Content-Type": "application/json",
  },
  body: JSON.stringify(requestBody),
});
const requestId = response.headers.get('x-request-id');
const payload = response.status === 204 ? null : await response.json();
if (!response.ok) throw Object.assign(new Error(payload?.error?.message), { code: payload?.error?.code, requestId });
console.log({ requestId, payload });

Python

import os
import json
from urllib.parse import quote
import requests

def required_env(name):
    value = os.getenv(name)
    if not value:
        raise RuntimeError(f"Set {name} before running this request.")
    return value

request_body = json.loads(required_env("ITMS_REQUEST_BODY"))
path = f"/api/v1/transactions/{quote(required_env('CODE'), safe='')}/refund"
response = requests.request(
    "POST",
    f"{os.getenv('ITMS_BASE_URL', 'https://prophit.ai')}{path}",
    headers={
        "Authorization": f"Bearer {required_env('ITMS_API_KEY')}",
    },
    json=request_body,
    timeout=30,
)
request_id = response.headers.get("x-request-id")
if not response.ok:
    error = response.json().get("error", {})
    raise RuntimeError(f"{error.get('code')}: {error.get('message')} (request_id={request_id})")
print(None if response.status_code == 204 else response.json())

Request and response shape

Request: code (the refund's own code), optional lines [{number, amount}] for partial refunds, optional tax_date
Response: The refund transaction; the original moves to partially_refunded or refunded

The versioned OpenAPI document is the machine-readable authority for required fields, types, enums, response schemas, and status codes. This page supplies the product and workflow context around that contract.

Integration contract

Use a key whose environment, organization, location, and scopes match the operation.
Validate the request against the customer OpenAPI document; never infer omitted required facts.
For create, apply, commit, refund, adjustment, or replay operations, follow the documented idempotency and duplicate semantics.
Persist the response request ID, result authority, warnings, and evidence references needed to reproduce the decision.
Handle the machine-readable error envelope and honor rate-limit retry headers.

POST /api/v1/transactions/{code}/refund