Merchant portal API

What the portal at app.paysigna.com calls on behalf of a signed-in member of a merchant's staff. Authenticated by a PASETO session rather than an API key, so there is nothing to paste into a console.

Reference only. This surface is authenticated by a portal session rather than by an API key, so there is no credential to paste and the request console is switched off. Its base URL is https://app.paysigna.com.