# Return domains with installed SSL certificates

This function lists the server's domains with installed SSL certificates.

Endpoint: GET /listcrts
Version: 11.134.0.5
Security: BasicAuth

## Query parameters:

  - `registered` (integer)
    Whether to limit the results to certificates registered with
a certificate authority (CA).

*  — Registered certificates .
*  — All certificates.
    Enum: 1, 0

  - `user` (string)
    The cPanel username.

If you do  use this parameter, the function returns certificates
for  accounts on the server.
    Example: "username"

## Response 200 fields (application/json):

  - `data` (object)

  - `data.crt` (array)
    Information about the certificate.

  - `data.crt.domain` (string)
    The certificate's primary domain.
    Example: "example.com"

  - `data.crt.domain_owners` (array)
    A list of the owners of the domain or domains that the certificate covers.
    Example: ["username"]

  - `data.crt.domains` (array)
    A list of the domain or domains that the certificate covers.
    Example: ["example.com"]

  - `data.crt.ecdsa_curve_name` (string,null)
    The ECDSA curve that the certificate's key uses.

* 
* 
*  — The certificate's key is  an ECDSA key.
    Enum: "prime256v1", "secp384r1"

  - `data.crt.friendly_name` (string)
    The certificate's friendly name.
    Example: "TestCertificate"

  - `data.crt.id` (string)
    The certificate's ID.
    Example: "example._com_d13b4_362b9_1400343187_b05e5c3e443dda9a8869c4cf7457829e"

  - `data.crt.is_self_signed` (integer)
    Whether the certificate is self-signed.

*  — Self-signed.
*  —  self-signed.
    Enum: 1, 0

  - `data.crt.issuer.organizationName` (string)
    The certificate's Organization Name.
    Example: "Organization"

  - `data.crt.key_algorithm` (string)
    The certificate's key's algorithm.

*  — RSA.
*  — ECDSA.
    Enum: "rsaEncryption", "id-ecPublicKey"

  - `data.crt.modulus_length` (integer,null)
    The certificate's key's modulus length, in bits.

*  — The certificate's key is  an RSA key.
    Example: 2048

  - `data.crt.not_after` (integer)
    The date the certificate expires.
    Example: 1601467200

  - `data.crt.registered` (integer)
    Whether the certificate is registered with a CA.

*  — Registered.
*  —  registered.
    Enum: 1, 0

  - `data.crt.signature_algorithm` (string)
    The certificate's OID hash algorithm signature.
    Example: "sha256WithRSAEncryption"

  - `data.crt.validation_type` (string,null)
    The certificate's validation type.

*  — Extended Validation.
*  — Organization Validation.
*  — Domain Validated.
*  — The system could  parse and determine the
certificate's validation type.
    Enum: "ev", "dv", "ov"

  - `metadata` (object)

  - `metadata.command` (string)
    The method name called.
    Example: "listcrts"

  - `metadata.reason` (string)
    The reason the API function failed when the  field is . This field may display a success message when a function succeeds.
    Example: "OK"

  - `metadata.result` (integer)
    *  — Success.
*  — Failed. Check the  field for more details.
    Enum: 1, 0

  - `metadata.version` (integer)
    The version of the API function.
    Example: 1