# Ct

2 endpoints on Ct. Every one returns the same response shape and has a flat, published price in credits.

Category: [Web tools](https://onekey.dev/docs/categories/web.md) · [Overview page](https://onekey.dev/platforms/ct)

## Endpoints

| Endpoint | What it does | Cost | Status |
| --- | --- | --- | --- |
| [`certificates`](https://onekey.dev/docs/api/ct/certificates.md) | Certificate Transparency: unexpired certificates issued for a domain (crt.sh). | 5 credits | stable |
| [`subdomains`](https://onekey.dev/docs/api/ct/subdomains.md) | Certificate Transparency subdomain discovery: unexpired certificates for *.domain (crt.sh). | 5 credits | stable |

Every endpoint page has a **Field mapping** section showing which source field becomes which [unified field](https://onekey.dev/docs/schema.md) (fixed schema) or platform-specific `ext.` field.