generated: '2026-07-20' method: searched source: https://github.com/paypay/paypayopa-sdk-node docs: https://developer.paypay.ne.jp/ note: >- PayPay OPA provides a full sandbox/staging environment. There are no published magic test card numbers (PayPay is a wallet network); testing is done with sandbox API keys against the sandbox gateway, driving payments through the PayPay app / test flow. Values below are published verbatim in the SDKs and OpenAPI. environments: - name: production env_name: PROD gateway: //apigw.paypay.ne.jp keys: production API key + secret from the Developer/Merchant Panel - name: sandbox env_name: STAGING default: true gateway: //apigw.sandbox.paypay.ne.jp keys: sandbox API key + secret from the Developer/Merchant Panel - name: staging env_name: STAGING gateway: //apigw.stg.paypay.ne.jp separation: mechanism: environment name (PROD vs STAGING) selects gateway host + key set note: STAGING is the SDK default so unconfigured integrations run against sandbox. signup: https://developer.paypay.ne.jp/