> For the complete documentation index, see [llms.txt](https://gdb-ndcgov.gitbook.io/gdb-web/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://gdb-ndcgov.gitbook.io/gdb-web/faq/apiapplication.md).
# API服務申請
## 1. API服務一定要加入會員嗎?
* 是的，基於平臺的服務水準、資料機敏性及資訊安全等考量，為避免服務或資料遭不當使用，因此API服務需要註冊會員並經過審核後方可使用。
## 2. API服務目前有提供什麼資料?
* 您可以至【資料集查詢】篩選已提供API服務之項目。
## 3. 什麼是OData標準介面格式供應?
* 本平臺於介接各來源端的資料後，會將資料標準化處理後，以OData（Open Data Protocol）標準介面格式對外供應，OData的好處在於允許不同的客戶端能存取不同的資料來源、以REST設計原則為導向、簡單可擴展，而且又是全球性的網頁開放式資料協定，因此能使本系統更能標準化。只要熟悉一下OData語法，即能彈性隨選On-Demand的取得目標資料內容，詳細內容請API特色章節中之支援OData查詢語法。
## 4. API服務是否有使用限制?
* 服務每日呼叫次數上限為 100 次，且每60秒內的呼叫次數不可超過一次。
## 5. API金鑰是永久有效的嗎?
* API金鑰有效期間為一年，到期前2個月系統將開放展延申請服務。
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# Agent Instructions
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## Querying This Documentation
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```
GET https://gdb-ndcgov.gitbook.io/gdb-web/faq/apiapplication.md?ask=&goal=
```
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