Lithic Payment API

openapi: 3.1.0
info:
  contact:
    email: support@lithic.com
  description: 'The Lithic Developer API is designed to provide a predictable programmatic interface for accessing your Lithic account through an API and transaction webhooks.

    Note that your API key is a secret and should be treated as such. Don''t share it with anyone, including us. We will never ask you for it.

    '
  termsOfService: https://lithic.com/legal/terms
  license:
    name: Apache 2.0
    url: https://www.apache.org/licenses/LICENSE-2.0.txt
  title: Lithic Developer 3DS Payment API
  version: 1.0.0
servers:
- description: Sandbox environment that provides key functionality mirroring production
  url: https://sandbox.lithic.com
security:
- ApiKeyAuth: []
tags:
- name: Payment
paths:
  /v1/payments:
    get:
      description: List all the payments for the provided search criteria.
      operationId: searchPayments
      parameters:
      - in: query
        name: financial_account_token
        required: false
        schema:
          format: uuid
          title: Financial Account Token
          type: string
      - in: query
        name: business_account_token
        required: false
        schema:
          format: uuid
          title: Business Account Token
          type: string
      - in: query
        name: account_token
        required: false
        schema:
          format: uuid
          title: Account Token
          type: string
      - in: query
        name: result
        required: false
        schema:
          enum:
          - APPROVED
          - DECLINED
          title: Result
          type: string
      - in: query
        name: status
        required: false
        schema:
          enum:
          - DECLINED
          - PENDING
          - RETURNED
          - SETTLED
          title: Status
          type: string
      - in: query
        name: category
        required: false
        schema:
          enum:
          - ACH
          title: Category
          type: string
      - $ref: '#/components/parameters/beginTime'
      - $ref: '#/components/parameters/endTime'
      - $ref: '#/components/parameters/endingBefore'
      - $ref: '#/components/parameters/pageSize'
      - $ref: '#/components/parameters/startingAfter'
      responses:
        '200':
          content:
            application/json:
              schema:
                properties:
                  data:
                    items:
                      $ref: '#/components/schemas/payment-transaction'
                    type: array
                  has_more:
                    description: More data exists.
                    type: boolean
                required:
                - data
                - has_more
                type: object
          description: OK
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: List payments
      tags:
      - Payment
    post:
      description: Initiates a payment between a financial account and an external bank account.
      operationId: createPayment
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/CreatePaymentRequest'
      responses:
        '202':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostPaymentResponse'
          description: Created
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Create payment
      tags:
      - Payment
  /v1/payments/{payment_token}:
    get:
      description: Get the payment by token.
      operationId: getPaymentByToken
      parameters:
      - in: path
        name: payment_token
        required: true
        schema:
          format: uuid
          title: Payment Token
          type: string
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/payment-transaction'
          description: OK
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Get payment by token
      tags:
      - Payment
  /v1/payments/{payment_token}/retry:
    post:
      description: Retry an origination which has been returned.
      operationId: retryPayment
      parameters:
      - in: path
        name: payment_token
        required: true
        schema:
          format: uuid
          title: Payment Token
          type: string
      responses:
        '202':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/PostPaymentResponse'
          description: Accepted
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Retry payment
      tags:
      - Payment
  /v1/payments/{payment_token}/return:
    post:
      description: "Return an ACH payment with a specified return reason code. Returns must be initiated\nwithin the time window specified by NACHA rules for each return code (typically 2 banking\ndays for most codes, 60 calendar days for unauthorized debits). For a complete list of\nreturn codes and their meanings, see the [ACH Return Reasons documentation](https://docs.lithic.com/docs/ach-overview#ach-return-reasons).\n\nNote:\n  * This endpoint does not modify the state of the financial account associated with the payment. If you would like to change the account state, use the [Update financial account status](https://docs.lithic.com/reference/updatefinancialaccountstatus) endpoint.\n  * By default this endpoint is not enabled for your account. Please contact your implementations manager to enable this feature.\n"
      operationId: returnPayment
      parameters:
      - in: path
        name: payment_token
        required: true
        schema:
          format: uuid
          title: Payment Token
          type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/payment_return_request'
      responses:
        '202':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/payment-transaction'
          description: Accepted
        '400':
          description: Bad Request
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                    description: '| Message | Description |

                      |---|---|

                      | Invalid account | The financial account token provided does not exist or is invalid |

                      | Invalid return reason code: {code} | The return reason code provided is not a valid NACHA return code |

                      | Return code RXX cannot be used for X accounts (SEC code: XYZ) | The return code is not valid for the account type (consumer vs non-consumer) |

                      | Return window expired. RXX must be initiated within {time_window}. Transaction posted {days} days ago. | The return is being initiated outside the allowed time window for the return code |

                      | date_of_death is required for return reason code RXX | The return code (R14 or R15) requires a date_of_death parameter |

                      | date_of_death must be in YYYY-MM-DD format, got: {date} | The date_of_death parameter is not in the correct format |

                      '
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          description: Not Found
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                    description: '| Message | Description |

                      |---|---|

                      | Transaction not found for this instance | The payment token does not correspond to a transaction for this account |

                      '
        '412':
          description: Precondition Failed
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                    description: '| Message | Description |

                      |---|---|

                      | Could only return ACH receipt | The transaction is not an ACH receipt (credit or debit) |

                      | Cannot return an ACH receipt that has already been returned | A return has already been initiated for this payment |

                      | Cannot return an ACH receipt that has not yet settled | The payment must be settled before it can be returned |

                      '
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Return payment
      tags:
      - Payment
  /v1/simulate/payments/receipt:
    post:
      description: Simulates a receipt of a Payment.
      operationId: simulatePaymentsReceipt
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/simulate_receipt_request'
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/simulate_payment_response'
          description: Created
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Simulate receipt
      tags:
      - Payment
  /v1/simulate/payments/release:
    post:
      description: Simulates a release of a Payment.
      operationId: simulatePaymentsRelease
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/simulate_origination_release_request'
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/simulate_payment_response'
          description: Created
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Simulate release payment
      tags:
      - Payment
  /v1/simulate/payments/return:
    post:
      description: Simulates a return of a Payment.
      operationId: simulatePaymentsReturn
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/simulate_origination_return_request'
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/simulate_payment_response'
          description: Created
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Simulate return payment
      tags:
      - Payment
  /v1/simulate/payments/{payment_token}/action:
    post:
      description: Simulate payment lifecycle event
      operationId: simulatePaymentAction
      parameters:
      - in: path
        name: payment_token
        required: true
        schema:
          format: uuid
          title: Payment Token
          type: string
      requestBody:
        content:
          application/json:
            schema:
              $ref: '#/components/schemas/simulate_action_request'
      responses:
        '200':
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/simulate_payment_response'
          description: Created
        '400':
          $ref: '#/components/responses/BadRequest'
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
        '429':
          $ref: '#/components/responses/TooManyRequests'
      summary: Simulate payment lifecycle event
      tags:
      - Payment
components:
  schemas:
    base_transaction:
      title: base_transaction
      description: Base class for all transaction types in the ledger service
      type: object
      properties:
        status:
          $ref: '#/components/schemas/transaction_status'
          description: The status of the transaction
        token:
          type: string
          description: Unique identifier for the transaction
          format: uuid
        created:
          type: string
          description: ISO 8601 timestamp of when the transaction was created
          format: date-time
        updated:
          type: string
          description: ISO 8601 timestamp of when the transaction was last updated
          format: date-time
      required:
      - status
      - token
      - created
      - updated
    PaymentMethodRequestAttributes:
      properties:
        sec_code:
          enum:
          - CCD
          - PPD
          - WEB
          title: SEC Code
          type: string
        ach_hold_period:
          description: Number of days to hold the ACH payment
          example: 0
          minimum: 0
          title: ACH Hold Period
          type: integer
        addenda:
          title: Addenda
          type:
          - string
          - 'null'
        override_company_name:
          description: Value to override the configured company name with. Can only be used if allowed to override
          maxLength: 512
          title: Override Company Name
          type:
          - string
          - 'null'
      required:
      - sec_code
      title: PaymentMethodRequestAttributes
      type: object
    simulate_origination_return_request:
      title: Simulate Origination Return Request
      type: object
      properties:
        payment_token:
          description: Payment Token
          type: string
          format: uuid
        return_reason_code:
          description: Return Reason Code
          type: string
          default: R01
          pattern: ^R[0-9][0-9]$
          example: R12
      required:
      - payment_token
    transfer_type:
      type: string
      enum:
      - ORIGINATION_CREDIT
      - ORIGINATION_DEBIT
      - RECEIPT_CREDIT
      - RECEIPT_DEBIT
      - WIRE_INBOUND_PAYMENT
      - WIRE_INBOUND_ADMIN
      - WIRE_OUTBOUND_PAYMENT
      - WIRE_OUTBOUND_ADMIN
      - WIRE_INBOUND_DRAWDOWN_REQUEST
      title: Transfer Type
    simulate_origination_release_request:
      title: Simulate Origination Release Request
      type: object
      properties:
        payment_token:
          description: Payment Token
          type: string
          format: uuid
      required:
      - payment_token
    supported_simulation_decline_reasons:
      type: string
      enum:
      - PROGRAM_TRANSACTION_LIMIT_EXCEEDED
      - PROGRAM_DAILY_LIMIT_EXCEEDED
      - PROGRAM_MONTHLY_LIMIT_EXCEEDED
      title: Supported Simulation Decline Reasons
    simulate_receipt_request:
      title: Simulate Receipt Request
      type: object
      properties:
        financial_account_token:
          description: Financial Account Token
          type: string
          format: uuid
        token:
          description: Customer-generated payment token used to uniquely identify the simulated payment
          type: string
          format: uuid
        receipt_type:
          description: Receipt Type
          type: string
          enum:
          - RECEIPT_CREDIT
          - RECEIPT_DEBIT
        amount:
          description: Amount
          type: integer
          minimum: 0
        memo:
          description: Memo
          type: string
      required:
      - financial_account_token
      - token
      - receipt_type
      - amount
    wire_party_details:
      title: Wire Party Details
      type: object
      properties:
        name:
          type:
          - string
          - 'null'
          description: Name of the person or company
        account_number:
          type:
          - string
          - 'null'
          description: Account number
        agent_name:
          type:
          - string
          - 'null'
          description: Name of the financial institution
        agent_id:
          type:
          - string
          - 'null'
          description: Routing number or BIC of the financial institution
      required: []
    WireMethodAttributes:
      type: object
      properties:
        wire_network:
          type: string
          enum:
          - FEDWIRE
          - SWIFT
          description: Type of wire transfer
        wire_message_type:
          type:
          - string
          - 'null'
          description: Type of wire message
        debtor:
          $ref: '#/components/schemas/wire_party_details'
        creditor:
          $ref: '#/components/schemas/wire_party_details'
        message_id:
          type:
          - string
          - 'null'
          description: Point to point reference identifier, as assigned by the instructing party, used for tracking the message through the Fedwire system
        remittance_information:
          type:
          - string
          - 'null'
          description: Payment details or invoice reference
      required:
      - wire_network
      - wire_message_type
    PostPaymentResponse:
      allOf:
      - $ref: '#/components/schemas/payment-transaction'
      - properties:
          balance:
            $ref: '#/components/schemas/balance'
        type: object
      title: PostPaymentResponse
    simulate_action_request:
      title: Simulate Action Request
      type: object
      properties:
        event_type:
          description: Event Type
          $ref: '#/components/schemas/supported_simulation_types'
        return_reason_code:
          description: Return Reason Code
          type: string
        decline_reason:
          description: Decline reason
          $ref: '#/components/schemas/supported_simulation_decline_reasons'
        return_addenda:
          description: Return Addenda
          type: string
        date_of_death:
          description: Date of Death for ACH Return
          type: string
          format: date
      required:
      - event_type
    related_account_tokens:
      title: Related Account Tokens
      description: Account tokens related to a payment transaction
      type: object
      properties:
        business_account_token:
          type:
          - string
          - 'null'
          format: uuid
          title: Business Account Token
          description: Globally unique identifier for the business account
        account_token:
          type:
          - string
          - 'null'
          format: uuid
          title: Account Token
          description: Globally unique identifier for the account
      required:
      - business_account_token
      - account_token
    result:
      type: string
      enum:
      - APPROVED
      - DECLINED
      title: Result
    transaction_status:
      title: Transaction Status
      type: string
      enum:
      - PENDING
      - SETTLED
      - DECLINED
      - REVERSED
      - CANCELED
      - RETURNED
    payment_event:
      title: Payment Event
      description: 'Note: Inbound wire transfers are coming soon (availability varies by partner bank). Wire-related fields below are a preview. To learn more, contact your customer success manager.


        Payment Event'
      type: object
      properties:
        amount:
          description: Amount of the financial event that has been settled in the currency's smallest unit (e.g., cents).
          type: integer
        created:
          description: Date and time when the financial event occurred. UTC time zone.
          type: string
          format: date-time
        detailed_results:
          description: More detailed reasons for the event
          type: array
          items:
            type: string
            enum:
            - APPROVED
            - DECLINED
            - FUNDS_INSUFFICIENT
            - ACCOUNT_INVALID
            - PROGRAM_TRANSACTION_LIMIT_EXCEEDED
            - PROGRAM_DAILY_LIMIT_EXCEEDED
            - PROGRAM_MONTHLY_LIMIT_EXCEEDED
        result:
          description: APPROVED financial events were successful while DECLINED financial events were declined by user, Lithic, or the network.
          type: string
          enum:
          - APPROVED
          - DECLINED
        token:
          description: Globally unique identifier.
          type: string
          format: uuid
        type:
          $ref: '#/components/schemas/payment_event_type'
        external_id:
          description: 'Payment event external ID. For ACH transactions, this is the ACH trace number.

            For inbound wire transfers, this is the IMAD (Input Message Accountability Data).

            '
          type:
          - string
          - 'null'
      required:
      - amount
      - created
      - result
      - token
      - type
    supported_simulation_types:
      type: string
      enum:
      - ACH_ORIGINATION_REVIEWED
      - ACH_ORIGINATION_RELEASED
      - ACH_ORIGINATION_PROCESSED
      - ACH_ORIGINATION_SETTLED
      - ACH_RECEIPT_SETTLED
      - ACH_RECEIPT_RELEASED
      - ACH_RECEIPT_RELEASED_EARLY
      - ACH_RETURN_INITIATED
      - ACH_RETURN_PROCESSED
      - ACH_RETURN_SETTLED
      title: Supported Simulation Types
    AchMethodAttributes:
      type: object
      properties:
        sec_code:
          type: string
          enum:
          - CCD
          - PPD
          - WEB
          - TEL
          - CIE
          - CTX
          description: SEC code for ACH transaction
        return_reason_code:
          type:
          - string
          - 'null'
          description: Return reason code if the transaction was returned
        ach_hold_period:
          type:
          - integer
          - 'null'
          minimum: 0
          description: Number of days the ACH transaction is on hold
        retries:
          type:
          - integer
          - 'null'
          minimum: 0
          description: Number of retries attempted
        company_id:
          type:
          - string
          - 'null'
          description: Company ID for the ACH transaction
        receipt_routing_number:
          type:
          - string
          - 'null'
          description: Receipt routing number
        trace_numbers:
          type: array
          items:
            type: string
          default: []
          description: Trace numbers for the ACH transaction
        addenda:
          type:
          - string
          - 'null'
          description: Addenda information
        override_company_name:
          type:
          - string
          - 'null'
          maxLength: 512
          description: Value to override the configured company name with. Can only be used if allowed to override
      required:
      - sec_code
    transaction_result:
      title: Transaction Result
      type: string
      enum:
      - APPROVED
      - DECLINED
    CreatePaymentRequest:
      properties:
        amount:
          minimum: 1
          title: Amount
          type: integer
        external_bank_account_token:
          format: uuid
          title: External Bank Account Token
          type: string
        financial_account_token:
          format: uuid
          title: Financial Account Token
          type: string
        memo:
          maxLength: 512
          pattern: ^[0-9A-Za-z \x20-\x7e\x40-\xff]*$
          title: Memo
          type: string
        method:
          enum:
          - ACH_NEXT_DAY
          - ACH_SAME_DAY
          title: Payment Method
          type: string
        method_attributes:
          $ref: '#/components/schemas/PaymentMethodRequestAttributes'
        token:
          description: Customer-provided token that will serve as an idempotency token. This token will become the transaction token.
          format: uuid
          title: Token
          type: string
        type:
          enum:
          - COLLECTION
          - PAYMENT
          title: Payment Type
          type: string
        user_defined_id:
          maxLength: 512
          title: User Defined Id
          type: string
        hold:
          description: Optional hold to settle when this payment is initiated.
          type: object
          properties:
            token:
              description: Token of the hold to settle when this payment is initiated.
              format: uuid
              type: string
          required:
          - token
      required:
      - amount
      - external_bank_account_token
      - financial_account_token
      - method
      - method_attributes
      - type
      title: CreatePaymentRequest
      type: object
    simulate_payment_response:
      title: Simulate Payment Response
      type: object
      properties:
        result:
          description: Request Result
          $ref: '#/components/schemas/result'
        transaction_event_token:
          description: Transaction Event Token
          type: string
          format: uuid
        debugging_request_id:
          description: Debugging Request Id
          type: string
          format: uuid
      required:
      - result
      - transaction_event_token
      - debugging_request_id
    payment_return_request:
      title: Payment Return Request
      description: Request to return an ACH payment
      type: object
      properties:
        financial_account_token:
          type: string
          format: uuid
          description: Globally unique identifier for the financial account
        return_reason_code:
          type: string
          pattern: ^R(0[1-9]|[1-4][0-9]|5[0-3]|8[0-5])$
          description: ACH return reason code indicating the reason for returning the payment. Supported codes include R01-R53 and R80-R85. For a complete list of return codes and their meanings, see [ACH Return Reasons](https://docs.lithic.com/docs/ach-overview#ach-return-reasons)
          example: R01
        memo:
          type:
          - string
          - 'null'
          maxLength: 10
          description: Optional memo for the return. Limited to 10 characters
        addenda:
          type:
          - string
          - 'null'
          maxLength: 44
          description: Optional additional information about the return. Limited to 44 characters
        date_of_death:
          type:
          - string
          - 'null'
          format: date
          description: Date of death in YYYY-MM-DD format. Required when using return codes **R14** (representative payee deceased) or **R15** (beneficiary or account holder deceased)
          example: '2025-01-15'
      required:
      - financial_account_token
      - return_reason_code
    error:
      type: object
      properties:
        debugging_request_id:
          type: string
          format: uuid
          description: Identifier to help debug an error.
        message:
          type: string
          description: Explanation of error response.
      required:
      - debugging_request_id
      - message
    balance:
      description: Balance
      properties:
        available_amount:
          description: Funds available for spend in the currency's smallest unit (e.g., cents for USD)
          type: integer
        created:
          description: Date and time for when the balance was first created.
          format: date-time
          type: string
        currency:
          description: 3-character alphabetic ISO 4217 code for the local currency of the balance.
          type: string
        financial_account_token:
          description: Globally unique identifier for the financial account that holds this balance.
          example: 3fa85f64-5717-4562-b3fc-2c963f66afa6
          format: uuid
          type: string
        financial_account_type:
          description: Type of financial account.
          enum:
          - ISSUING
          - OPERATING
          - RESERVE
          - SECURITY
          type: string
        last_transaction_event_token:
          description: Globally unique identifier for the last financial transaction event that impacted this balance.
          format: uuid
          type: string
        last_transaction_token:
          description: Globally unique identifier for the last financial transaction that impacted this balance.
          format: uuid
          type: string
        pending_amount:
          description: Funds not available for spend due to card authorizations or pending ACH release. Shown in the currency's smallest unit (e.g., cents for USD).
          type: integer
        total_amount:
          description: The sum of available and pending balance in the currency's smallest unit (e.g., cents for USD).
          type: integer
        updated:
          description: Date and time for when the balance was last updated.
          format: date-time
          type: string
      required:
      - available_amount
      - created
      - currency
      - financial_account_token
      - financial_account_type
      - last_transaction_event_token
      - last_transaction_token
      - pending_amount
      - total_amount
      - updated
      type: object
    payment-transaction:
      title: Payment Transaction
      description: Payment transaction
      definitions:
        AchMethodAttributes:
          type: object
          properties:
            sec_code:
              type: string
              enum:
              - CCD
              - PPD
              - WEB
              - TEL
              - CIE
              - CTX
              description: SEC code for ACH transaction
            return_reason_code:
              type:
              - string
              - 'null'
              description: Return reason code if the transaction was returned
            ach_hold_period:
              type:
              - integer
              - 'null'
              minimum: 0
              description: Number of days the ACH transaction is on hold
            retries:
              type:
              - integer
              - 'null'
              minimum: 0
              description: Number of retries attempted
            company_id:
              type:
              - string
              - 'null'
              description: Company ID for the ACH transaction
            receipt_routing_number:
              type:
              - string
              - 'null'
              description: Receipt routing number
            trace_numbers:
              type: array
              items:
                type: string
              default: []
              description: Trace numbers for the ACH transaction
            addenda:
              type:
              - string
              - 'null'
              description: Addenda information
            override_company_name:
              type:
              - string
              - 'null'
              maxLength: 512
              description: Value to override the configured company name with. Can only be used if allowed to override
          required:
          - sec_code
        WireMethodAttributes:
          type: object
          properties:
            wire_network:
              type: string
              enum:
              - FEDWIRE
              - SWIFT
              description: Type of wire transfer
            wire_message_type:
              ty

# --- truncated at 32 KB (47 KB total) ---
# Full source: https://raw.githubusercontent.com/api-evangelist/lithic/refs/heads/main/openapi/lithic-payment-api-openapi.yml