Certificate API

Library of Code sp-us | Board of Directors

This is an HTTP API which provides information on the x509 certificates deployed on TLS sites. You can self-host this yourself, however you're more than welcome to use the public API at https://certapi.libraryofcode.org/

How to Query

Send a GET request to https://certapi.libraryofcode.org with the query parameter q set to equal the site you wish to dial. Ex: https://certapi.libraryofcode.org/?q=www.google.com

Response & Types

Error

If the status !== true, there will be a message field which displays the error.

{
  status: false,
  message: string,
}

200 | SUCCESS

{
  status: true | false,
  subject: {
    commonName: string,
    organization: string[],
    organizationalUnit: string[],
    locality: string[],
    country: string[],
  },
  issuer: {
    commonName: string,
    organization: string[],
    organizationalUnit: string[],
    locality: string[],
    country: string[],
  },
  validationType: 'DV' | 'OV' | 'EV',
  signatureAlgorithm: string,
  publicKeyAlgorithm: string,
  serialNumber: number,
  notAfter: Date,
  extendedKeyUsage: ['All/Any Usages', 'TLS Web Server Authentication', 'TLS Web Client Authentication', 'Code Signing', 'E-mail Protection (S/MIME)'],
  san: string,
  fingerprint: string,
}