curl --request GET \
  --url https://api.entendre.finance/v1/accounting-periods/{period_id}/close-preflight \
  --header 'X-API-Key: <api-key>'

const options = {method: 'GET', headers: {'X-API-Key': '<api-key>'}};

fetch('https://api.entendre.finance/v1/accounting-periods/{period_id}/close-preflight', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

import requests

url = "https://api.entendre.finance/v1/accounting-periods/{period_id}/close-preflight"

headers = {"X-API-Key": "<api-key>"}

response = requests.get(url, headers=headers)

print(response.text)

{
  "data": {
    "accounting_period": {
      "id": "ap_507f1f77bcf86cd799439011",
      "status": "Open",
      "start_date": "2026-08-01",
      "end_date": "2026-08-31",
      "legal_entity_id": "le_507f1f77bcf86cd799439011"
    },
    "preconditions": {
      "can_close": false,
      "blocking_reasons": [
        "No next accounting period exists. Close requires a successor period to carry closing balances forward."
      ]
    },
    "pending_transactions": {
      "count": 0,
      "sum_credit_usd": 0,
      "sum_debit_usd": 0,
      "preview": []
    },
    "draft_journal_entries": {
      "count": 1,
      "preview": [
        {
          "sequence_number": "JE-1001",
          "id": "je_507f1f77bcf86cd799439011",
          "date": "2026-08-31",
          "amount_usd": null,
          "label": "September software expense"
        }
      ]
    },
    "recommendation": "hold"
  }
}

{
  "error": {
    "code": "VALIDATION_ERROR",
    "message": "Invalid path, query or request body.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "UNAUTHORIZED",
    "message": "Invalid or expired API Key",
    "request_id": "req_example",
    "suggested_action": "Send an API key in X-API-Key, or an OAuth access token as Authorization: Bearer. Refresh an expired access token.",
    "documentation_url": "https://entendre.ai/docs/get-started/authentication"
  }
}

{
  "error": {
    "code": "FORBIDDEN",
    "message": "Insufficient access to organization",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "RESOURCE_NOT_FOUND",
    "message": "Resource not found",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "PERIOD_MALFORMED",
    "message": "The accounting period cannot be processed.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "RATE_LIMITED",
    "message": "Rate limit exceeded. Retry after 30s.",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "INTERNAL_ERROR",
    "message": "Internal server error",
    "request_id": "req_example"
  }
}

{
  "error": {
    "code": "SERVICE_UNAVAILABLE",
    "message": "Service unavailable.",
    "request_id": "req_example"
  }
}