openapi: 3.1.0 info: title: Interswitch Recharge Airtime PIN API description: 'Virtual top-up (direct airtime and data) and e-pin voucher delivery for MTN, Airtel, Glo, and 9mobile. Same biller / category / payment-item flow as Bills Payment; category ID `4` is reserved for airtime billers and the customer''s phone number is supplied as `customer_id` on the payment advice. ' version: '2024-01-01' servers: - url: https://sandbox.interswitchng.com description: Sandbox - url: https://saturn.interswitchng.com description: Production security: - InterswitchAuth: [] tags: - name: PIN paths: /card-360/api/v1/cards/{cardId}/pin: post: tags: - PIN summary: Set Or Reset Card PIN operationId: setCardPin parameters: - in: path name: cardId required: true schema: type: string requestBody: required: true content: application/json: schema: type: object required: - pinBlock properties: pinBlock: type: string description: ISO-9564 PIN block. responses: '200': description: PIN updated. components: securitySchemes: InterswitchAuth: type: apiKey in: header name: Authorization