> For the complete documentation index, see [llms.txt](https://developers-apps-in-toss.toss.im/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://developers-apps-in-toss.toss.im/documentation/api/response-format.md).

# 응답 형식

이 문서는 파트너 서버 API의 공통 응답 형식을 설명해요.

모든 응답은 공통 봉투(envelope)로 감싸져요.

성공:

```json
{"resultType": "SUCCESS", "success": { ... }}
```

실패:

```json
{"resultType": "FAIL", "success": null, "error": {"errorType": 0, "errorCode": "4010", "reason": "...", "data": {}, "title": null}}
```

**비즈니스 오류는 HTTP 200으로 응답해요.** `resultType`이 `SUCCESS`인지 확인하고, `SUCCESS`가 아닌 값은 모두 실패로 처리하세요. 요청 형식 오류(필드 검증 실패)는 HTTP 400, 분류되지 않은 서버 오류는 HTTP 500으로 응답해요. 요청 한도를 초과하면 HTTP 200에 `errorCode: "4095"`와 `error.data.retryAfterSeconds`가 내려가요.


---

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## Querying This Documentation
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```
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