I’m consulting for a banking client and we’ve hit a major roadblock in our RFP evaluation. The client’s core banking API requires MTLS (Mutual TLS) for all incoming API requests.
Looking through the Genesys Cloud documentation for ‘Web Services Data Actions’, I only see options for standard one-way TLS (where the Data Action validates the server’s certificate) and standard OAuth/Basic Auth headers. There doesn’t appear to be a way to upload a client certificate and private key to the Data Action configuration so that Genesys Cloud can present it during the TLS handshake. Is MTLS supported natively, or do we have to architect an entire API Gateway middleware just to handle the client-side certificate presentation?
We ran into this exact requirement for our predictive dialer integration with a credit bureau.
You are correct. Genesys Cloud Data Actions do not natively support MTLS (Client Certificate Authentication) out of the box. You cannot upload a .pfx or .pem file to the integration configuration. The platform relies on header-based authentication (OAuth 2.0, API Keys) over standard HTTPS.
When we migrated from CXone (which did support some legacy MTLS setups), we had to redesign this.
Yes, you absolutely need middleware. Our standard pattern is to deploy an AWS API Gateway with a Lambda function. The API Gateway uses standard OAuth to authenticate the incoming request from Genesys Cloud. The Lambda function then holds the client certificate (stored securely in AWS Secrets Manager) and makes the downstream MTLS connection to the bank. It adds about 50ms of latency, but it satisfies the Infosec requirements without breaking the Genesys architecture.
As a security officer, I actually prefer the middleware approach.
If you embed the client certificate directly into the SaaS platform (Genesys), rotating that certificate when it expires becomes a manual, disruptive process tied to your call flows. By offloading it to an AWS API Gateway or an Apigee proxy, your DevOps team can automate certificate rotation using standard ACME protocols without ever touching the Genesys Admin UI or risking a fat-finger mistake that takes down the IVR.