@alexmarion dude WTH. This should be in the documentation! I'm using node as backend to create the Apple Pay server as well. Also, I'm using node-fetch and custom https agent. Here's two commands I've used to get the .key and .cert files https://stackoverflow.com/a/15144560 openssl pkcs12 -in certificado.p12 -out nuevo.crt.pem -clcerts -nokeys openssl pkcs12 -in certificado.p12 -out nuevo.key.pem -nocerts -nodes then it can be used like this const httpsAgent = new https.Agent({ key: fs.readFileSync('nuevo.key.pem'), cert: fs.readFileSync('nuevo.crt.pem'), rejectUnauthorized: false }); const options= { merchantIdentifier: "merchant.prueba", displayName: "Prueba", initiative: "web", initiativeContext: "foo-bar-test.ngrok.io" }; fetch('https://apple-pay-gateway-cert.apple.com/paymentservices/startSession', { method: 'POST', body: JSON.stringify(options), agent: httpsAgent }) .then(function(response) { return response.json(); }).then(function () { // response });