ITMS API — POST /api/v1/tax-engine/provider-quotes/apply

Calculate tax and apply the reviewed result to a supported provider draft before provider confirmation.

POST/api/v1/tax-engine/provider-quotes/apply

Calculate tax and apply the reviewed result to a supported provider draft before provider confirmation.

Persistence: Creates an auditable provider binding. The provider mutation requires a distinct Idempotency-Key and never follows from calculation authority alone.
Auth: API key · scopes tax:calculate and transactions:write · provider profile authorization enforced
Request: Provider draft reference, calculation request, connection binding, and Idempotency-Key header
Response: Calculated result, provider application result, binding identity, lifecycle status, and idempotent replay state

Request template for this operation

Set ITMS_API_KEY to a key with the scope shown above. Use a sandbox key while developing. 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

: "${ITMS_IDEMPOTENCY_KEY:?Set ITMS_IDEMPOTENCY_KEY for the required Idempotency-Key header}"
curl --request POST \
  --url "${ITMS_BASE_URL:-https://prophit.ai}/api/v1/tax-engine/provider-quotes/apply" \
  --header "Authorization: Bearer ${ITMS_API_KEY}" \
  --header "Idempotency-Key: ${ITMS_IDEMPOTENCY_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 ${name} before running this request.`);
  return value;
};
const requestBody = JSON.parse(requiredEnv("ITMS_REQUEST_BODY"));
const path = `/api/v1/tax-engine/provider-quotes/apply`;
const response = await fetch(`${process.env.ITMS_BASE_URL ?? 'https://prophit.ai'}${path}`, {
  method: "POST",
  headers: {
    Authorization: `Bearer ${requiredEnv('ITMS_API_KEY')}`,
    "Idempotency-Key": requiredEnv("ITMS_IDEMPOTENCY_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
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/tax-engine/provider-quotes/apply"
response = requests.request(
    "POST",
    f"{os.getenv('ITMS_BASE_URL', 'https://prophit.ai')}{path}",
    headers={
        "Authorization": f"Bearer {required_env('ITMS_API_KEY')}",
        "Idempotency-Key": required_env("ITMS_IDEMPOTENCY_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: Provider draft reference, calculation request, connection binding, and Idempotency-Key header
Response: Calculated result, provider application result, binding identity, lifecycle status, and idempotent replay state

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/tax-engine/provider-quotes/apply