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Secure mTLS, API, and host-to-host connections with a dedicated X9 PKI Certificate. Built for trusted client authentication between organizations without relying on browser-controlled public TLS roots.
| Product Name | DigiCert X9 PKI Certificate |
|---|---|
| Product SKU | S2BDIGX9PKI534 |
| Certificate Authority | |
| Product Type | X9 PKI for TLS |
| Primary Use | mTLS and client authentication |
| Certificate Cost | From £300.00 / year |
| Validity | Up to 3 years |
| Issuance Time | 1–3 business days, subject to validation |
| Technical Support | Order assistance, validation coordination, CSR guidance, deployment questions, and renewal assistance |
| Customer Reviews |
 4.8/5 stars based on 15818 reviews |
| Extended Key Usage | Client Authentication, Server Authentication, or both |
|---|---|
| Trust Model | Browser-independent X9 PKI |
| Names Included | 1 FQDN or IP address |
| Additional SANs | Up to 100 additional FQDNs or IP addresses |
| Wildcard Domains | Not supported |
| CSR Required | Yes |
| Validation | Organization validation and domain/IP control verification |
| Reissues | Unlimited and free during the certificate validity period |
| Certificate Standard | X.509 |
|---|---|
| RSA Key Sizes | 2048, 3072, and 4096 bits |
| ECC Curves | P-256 and P-384 |
| Supported Names | Fully qualified domain names and IP addresses |
| Root Environment | DigiCert X9 PKI |
| Browser Trust | Not browser-trusted |
| Policy Governance | ASC X9 Certificate Policy |
What You Need to Order a DigiCert X9 PKI Certificate
Prepare the certificate names, CSR, and validation details required before issuance.
Certificate Names
Provide the fully qualified domain names and IP addresses to include in the certificate. Wildcard domains are not supported.
CSR and Key Algorithm
Generate a CSR using a supported RSA or ECC key. The CSR contains the public key and certificate request details.
Organization and Control Validation
DigiCert validates the requesting organization and control of the FQDNs or IP addresses included in the order.
Best Fit for DigiCert X9 PKI Certificate
DigiCert X9 PKI is suited to non-browser TLS connections where systems, services, or organizations need certificate-based authentication through a common, governed trust hierarchy.
mTLS for APIs and Services
Authenticate clients connecting to protected APIs, application services, and microservices across non-browser TLS environments.
Host-to-Host Authentication
Use certificate identity for IBM MQ, Connect:Direct, FTPS, and other machine-to-machine connections.
Partner and Vendor Connections
Establish a shared trust path when systems operated by separate organizations need to authenticate each other.
Financial Infrastructure
Support authentication across payment systems, ATM and POS networks, interbank services, and other regulated connections.
DigiCert X9 PKI Certificate Issuance Process
The process covers certificate configuration, CSR submission, organization and domain or IP validation, issuance, and X9 trust-chain deployment.
Select Term & Certificate Names
Choose a certificate term of up to three years and provide the FQDNs, IP addresses, and additional SANs required.
Generate & Submit the CSR
Create a CSR using a supported RSA or ECC key, then submit it with the certificate request.
Complete Validation
DigiCert validates the requesting organization and verifies control of the FQDNs or IP addresses included in the order.
Certificate Issuance
After validation is complete, DigiCert issues the certificate and provides the associated X9 certificate chain.
Install the Certificate & Configure Trust
Install the certificate on the intended system and distribute the X9 trust chain to the clients, servers, or partner systems that must trust it.
DigiCert X9 PKI Certificate FAQs
Get quick answers about where X9 PKI fits, how its trust model works, and what is required for deployment.
What is a DigiCert X9 PKI Certificate?
Can I use the DigiCert X9 PKI Certificate on a public website?
Should I choose X9 PKI or an internal private CA?
Do I need to install the X9 certificate chain?
What support does SSL2BUY provide?
