cart.apply_coupon

Apply a coupon code to the cart. Anonymous (cart_id). Refuses with a distinct reason per case; a code whose threshold is not reached yet is accepted and explains itself through the cart’s progress data.

• Scope: public
• System: no
• Reachable from: POST /v1/cart/commands/cart.apply_coupon — an ANONYMOUS face: x-forge-store is required, no credential is sent, and it is never on /v1/commands/* · MCP tool cart.apply_coupon
• Events: none — Applying a code changes only this cart, read no-store; promotion.applied is emitted where the promotion is actually used.

Input (JSON Schema)

{
  "properties": {
    "cart_id": {
      "minLength": 1,
      "type": "string"
    },
    "code": {
      "maxLength": 64,
      "minLength": 1,
      "type": "string"
    }
  },
  "required": [
    "cart_id",
    "code"
  ],
  "type": "object"
}

Result (200)

{
  "additionalProperties": false,
  "properties": {
    "cart_id": {
      "type": "string"
    },
    "code": {
      "type": "string"
    }
  },
  "required": [
    "cart_id",
    "code"
  ],
  "type": "object"
}

Errors

validation_failed (400) · unauthorized (401) · forbidden (403) · conflict (409) · internal (500)