Instant URLs are dynamic image URLs bound to a single Image Template. Once created, you can render images on-the-fly by appending parameters to the URL, with no API request needed per image.
Each Instant URL has a mode (how parameters are encoded) and a security setting.
Modes
- Encoded - encodes your URL using Base64
- Named Params - human-readable URLs with editable query parameters
Security
- Signed - Signed URLs require an HMAC signature for tamper protection
- Open - No signature is required, but your URLs can be tampered with by anyone with access to it
Use signed security for production: requests are validated with an HMAC signature derived from the signing_key returned at creation. The signing key is only returned once — store it immediately.
