REST API Validate CSR

Validate certificate signing request (CSR) POST

You might want to validate a certificate signing request (CSR) e.g. before using it in a certificate creation request.

API Request URL:

api.zerossl.com/validation/csr

GET Request Parameters:

Parameter Description
access_key [Required] Use this parameter to specify your API access key.

POST Request Parameters:

Parameter Description
csr [Required] The CSR you want to validate.

API Response:

If your CSR is valid, you will receive the following JSON:

{
    "valid": true,
    "error": null,
    "csrResponse": [
        "2048",
        "sigalg=sha256WithRSAEncryption"
    ]
}

Response Objects:

Parameter Description
valid Returns true to indicate your CSR is valid, false otherwise.
error Returns null in case the CSR was successfully validated, error code and description otherwise.
csrResponse Returns an array containing the key size and signature algorithm in case the CSR was successfully validated, null otherwise.
Error Codes →