> ## Documentation Index > Fetch the complete documentation index at: https://docs.younegotiate.com/llms.txt > Use this file to discover all available pages before exploring further. # Show Helping Hand payment > Validate a signed Helping Hand link and return the public payer-facing account, amount, allocation, and payment-method data. The DFA donation terms are static frontend content and are not returned by this endpoint. No consumer authentication token is required. The signed `c`, optional `allocation`, and `signature` query parameters must be preserved exactly from the generated backend payment URL. ## OpenAPI ````yaml /api/consumer.openapi.yaml get /payment openapi: 3.1.0 info: title: YouNegotiate Consumer API version: '2.0' description: >- Stateless API endpoints for consumer portal authentication and account access. servers: - url: https://api.consumer.younegotiate.com description: Production security: [] tags: - name: System description: Public consumer domain system and health endpoints. - name: Authentication description: >- Consumer identity matching, contact capture, OTP verification, token creation, and logout endpoints. - name: Profile - My ecoAddress description: Consumer profile tab for signed-in identity / ecoAddress context. - name: Profile - Communication Controls description: >- Consumer profile tab for communication permissions, email/mobile changes, and email/mobile verification. - name: Profile - My Billing Details description: >- Consumer profile tab for billing name and billing address details used for payment verification. - name: Profile - Personalize My Portal description: Consumer profile tab for portal colors and profile image personalization. - name: Accounts description: Consumer-owned account list and account detail endpoints. - name: Bill Pay Wallet description: >- Consumer Bill Pay Wallet saved payment profiles and scheduled payment method update endpoints. - name: Upcoming Payments description: >- Consumer My Bill Pay Calendar upcoming-payment rows and calendar display data. - name: Calendar Sync description: >- Consumer Google and Microsoft calendar connection, OAuth callback, and live-update endpoints. - name: Gift Registry description: >- Consumer Bill Pay Gift Registry account list, shared registry, and Helping Hand link endpoints. - name: EcoMailbox description: Consumer MyEcoMailBox list endpoints and unread sidebar badge state. - name: Notice Responses description: >- Consumer My Account notice-response wizard endpoints for sender details and account details. paths: /payment: get: tags: - Gift Registry summary: Show Helping Hand payment description: >- Validate a signed Helping Hand link and return the public payer-facing account, amount, allocation, and payment-method data. The DFA donation terms are static frontend content and are not returned by this endpoint. No consumer authentication token is required. The signed `c`, optional `allocation`, and `signature` query parameters must be preserved exactly from the generated backend payment URL. operationId: consumerShowExternalPayment parameters: - name: c in: query required: true description: Hex-encoded consumer account ID embedded in the generated link. schema: type: string example: '313233' - name: allocation in: query required: false description: >- Payment-plan allocation strategy. Settlement links omit this parameter. schema: $ref: '#/components/schemas/ConsumerPaymentAllocationStrategy' - name: signature in: query required: true description: Laravel URL signature generated by the backend. schema: type: string example: signed responses: '200': description: Helping Hand payment page data returned. content: application/json: schema: $ref: '#/components/schemas/ExternalPaymentPageResponse' '403': description: Invalid or expired link. content: application/json: schema: $ref: d7f83941-731e-4dcf-87d4-d5fe33ae6d95 example: message: Invalid or expired link. '409': description: >- The account is settled, hidden, or otherwise no longer eligible for Helping Hand payment. content: application/json: schema: oneOf: - $ref: '#/components/schemas/ExternalPaymentSettledResponse' - $ref: '#/components/schemas/ExternalPaymentUnavailableResponse' '422': $ref: '#/components/responses/ValidationError' '429': $ref: '#/components/responses/TooManyRequests' components: schemas: ConsumerPaymentAllocationStrategy: type: string enum: - due_date - plan_level example: due_date ExternalPaymentPageResponse: type: object required: - data properties: data: $ref: '#/components/schemas/ExternalPaymentPageData' ExternalPaymentSettledResponse: type: object required: - code - message properties: code: type: string const: account_settled message: type: string const: This account has been settled. ExternalPaymentUnavailableResponse: type: object required: - code - message properties: code: type: string const: payment_unavailable message: type: string example: This Helping Hand payment is no longer available. ExternalPaymentPageData: type: object required: - recipient - account - payment - allocation - supported_payment_methods properties: recipient: type: object required: - display_name properties: display_name: type: string example: Sem Karan account: type: object required: - name - creditor_name properties: name: type: - string - 'null' example: Medical Account creditor_name: type: - string - 'null' example: Acme Agency payment: $ref: '#/components/schemas/ExternalPaymentAmount' allocation: anyOf: - $ref: '#/components/schemas/ExternalPaymentAllocation' - type: 'null' supported_payment_methods: type: array description: >- Available payment methods in frontend display order. Card is returned before ACH when both are supported. items: $ref: '#/components/schemas/ExternalPaymentMethod' ValidationErrorResponse: type: object required: - message - errors properties: message: type: string errors: type: object additionalProperties: type: array items: type: string MessageResponse: type: object required: - message properties: message: type: string ExternalPaymentAmount: type: object required: - mode - amount_editable - amount - minimum_amount - maximum_amount - current_balance - installment_type - installment_type_label - monthly_amount properties: mode: type: string enum: - settlement - payment_plan amount_editable: type: boolean description: >- Render an amount input only when true. Otherwise display and submit the fixed server amount. amount: type: string pattern: ^\d+\.\d{2}$ example: '100.00' minimum_amount: type: string example: '1.00' maximum_amount: type: string example: '100.00' current_balance: type: string example: '200.00' installment_type: type: - string - 'null' example: monthly installment_type_label: type: - string - 'null' example: Monthly monthly_amount: type: - string - 'null' example: '50.00' ExternalPaymentAllocation: type: object required: - value - label properties: value: $ref: '#/components/schemas/ConsumerPaymentAllocationStrategy' label: type: string example: Pay earliest installments first ExternalPaymentMethod: type: object required: - value - label properties: value: type: string enum: - cc - ach label: type: string enum: - Card - ACH responses: ValidationError: description: Request validation failed. content: application/json: schema: $ref: '#/components/schemas/ValidationErrorResponse' TooManyRequests: description: Request was rate limited. content: application/json: schema: $ref: '#/components/schemas/MessageResponse' ````