> For the complete documentation index, see [llms.txt](https://docs.blockchainsecurity.asia/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.blockchainsecurity.asia/api-reference/readme/investigation/bitcoin-zhao-ling-di-zhi-zhen-ce.md).

# Bitcoin 找零地址偵測

辨識一筆 Bitcoin 交易中可能的找零地址，協助區分實際收款輸出與退回付款方的找零，還原更接近真實的資金方向。

## POST /v1/btc/change-address

>

```json
{"openapi":"3.1.0","info":{"title":"Blockchain Atlantis API Gateway","version":"0.1.0"},"tags":[{"description":"辨識一筆 Bitcoin 交易中可能的找零地址，協助區分實際收款輸出與退回付款方的找零，還原更接近真實的資金方向。","name":"Bitcoin 找零地址偵測"}],"servers":[{"description":"Production","url":"https://api.blockchainsecurity.asia"}],"security":[{"api_key":[]}],"components":{"securitySchemes":{"api_key":{"in":"header","name":"X-API-Key","type":"apiKey"}},"schemas":{"ChangeAddressRequest":{"description":"`POST /v1/btc/change-address` 的請求 body。","properties":{"txid":{"description":"Bitcoin 交易 ID（txid）。","type":"string"}},"required":["txid"],"type":"object"}}},"paths":{"/v1/btc/change-address":{"post":{"operationId":"change_address","requestBody":{"content":{"application/json":{"schema":{"$ref":"#/components/schemas/ChangeAddressRequest"}}},"required":true},"responses":{"200":{"content":{"application/json":{}},"description":"偵測成功，回傳找零地址與判定依據"},"400":{"description":"請求參數有誤，請提供 txid"},"401":{"description":"缺少或無效的 API key"},"502":{"description":"後端服務暫時無法回應，請稍後重試"}},"summary":"","tags":["Bitcoin 找零地址偵測"]}}}}
```