SSL Certificate Information Lookup API

1. Basic Usage

TIP

This API is used to query SSL certificate information for a specified domain, including the issuer, validity period, serial number, etc.

Base API URL:

https://zeapi.ink/v1/api/sslinfo

Retrieve SSL certificate information via the following URL or a POST request:

https://zeapi.ink/v1/api/sslinfo?domain=zeapi.ink

Or send JSON data via a POST request:

{
    "domain": "zeapi.ink"
}

The shell request code is as follows:

curl -X GET "https://zeapi.ink/v1/api/sslinfo?domain=zeapi.ink"

Or using POST:

curl -X POST https://zeapi.ink/v1/api/sslinfo \
-H "Content-Type: application/json" \
-d '{"domain": "zeapi.ink"}'

2. Request Parameter Description

Parameter	Type	Required	Default	Description
domain	string	Yes	None	The target domain, e.g., zeapi.ink or https://zeapi.ink

3. JSON Response Format

Example of a successful response:

{
    "status": "success",
    "message": "",
    "data": {
        "domain": "zeapi.ink",
        "issuer": "Let's Encrypt",
        "commonName": "zeapi.ink",
        "validFrom": "2025-07-20 00:05:38",
        "validTo": "2025-10-18 00:05:37",
        "serialNumber": "0x057735F021EF18DF2AB614D06227EEEDDD27",
        "signatureType": "ecdsa-with-SHA384",
        "daysUntilExpiry": 57
    }
}

Example of an error response (missing domain parameter):

{
    "status": "error",
    "message": "Please provide the domain parameter",
    "data": null
}

Example of an error response (invalid domain format):

{
    "status": "error",
    "message": "Invalid domain format",
    "data": null
}

Example of an error response (unable to connect or retrieve certificate):

{
    "status": "error",
    "message": "Failed to connect to zeapi.ink: Connection timed out",
    "data": null
}

4. Response Field Description

Field	Type	Description
status	string	Request status, success or error
message	string	Error message (returned only on request failure)
data	object	Certificate information (returned only on success)
data.domain	string	The requested domain
data.issuer	string	Certificate issuer organization (extracted from issuer.O)
data.commonName	string	Certificate Common Name (CN, extracted from subject.CN)
data.validFrom	string	Certificate validity start time (format: YYYY-MM-DD HH:MM:SS)
data.validTo	string	Certificate validity end time (format: YYYY-MM-DD HH:MM:SS)
data.serialNumber	string	Certificate serial number
data.signatureType	string	Signature algorithm type (e.g., ecdsa-with-SHA384)
data.daysUntilExpiry	number	Number of days remaining until the certificate expires