The Platform API is for platforms that provide payments as an embedded feature within their own application. The platform owns the payment experience — merchants interact with the platform's UI, and Shuttle operates in the background. Merchants have no direct relationship with Shuttle; the platform provisions and manages everything on their behalf.

This is a deep integration. The platform controls the full payment flow, creates and manages merchant instances, and accesses all payment APIs using its own credentials scoped to a specific merchant.

Platform Endpoints

These are platform-level operations not available to individual merchants:

List instances: search across all your merchant instances
Create an instance: provision a new merchant
Get an instance: retrieve a specific merchant instance
Update an instance: update instance configuration
Delete an instance: archive a merchant (irreversible)

Accessing the Merchant Instance API

The entire Merchant Instance API is available to platforms by scoping requests under the instance path:

/c/api/instances/{instance_key}/...

For example, to create a payment for merchant M12345:

POST /c/api/instances/M12345/payments

Or to list accounts:

GET /c/api/instances/M12345/accounts

Every endpoint documented in the Merchant Instance API is available this way — payments, checkouts, accounts, contracts, gateways, and more. The instance_key is your identifier for the merchant, as set when you created the instance.