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Every API request must include your API key in the request header. Separate key pairs exist for Test and Production environments. 
Authorization: Bearer <your_api_key>
Content-Type: application/json

Test API key format

svp_test_xxxxxxxxxxxx

Production API key format

svp_live_xxxxxxxxxxxx

Test secret key format

svp_test_sk_xxxxxxxxxxxx

Production secret key format

svp_live_sk_xxxxxxxxxxxx
Never expose your secret key on the client side. Use it only in server-to-server calls for signature validation and webhook verification.