> ## Documentation Index > Fetch the complete documentation index at: https://docs.tangoanalytics.com/llms.txt > Use this file to discover all available pages before exploring further. # Retrieve Nexus Statement Revisions > A `GET` request will list all of a Nexus statement's revisions*.* If a response is null, the statement was deleted. *Response Body Structure* | Path | Type | Description | | --- | --- | --- | | `[].response` | `Nexus Statement Model` | The statement's raw body at a given revision | | `[].timestamp` | `Timestamp` | The timestamp for a statement's revision | ## OpenAPI ````yaml /tango_watchwire/integrations/guides/watchwire-api.yaml get /nexus/{statementId}/revisions openapi: 3.1.0 info: title: WatchWire API version: 1.0.0 description: >- The WatchWire Platform has APIs that allow you to access your data programmatically. There are several APIs designed for the modules in the WatchWire platform including - Invoice Data, Real-Time, Accounts Payable, and Measurement & Verification. All are highly scalable, and secure APIs that communicate over HTTPS RESTful protocols with JSON based documents. > **Note**: Not all WatchWire modules are available as an API. # Authentication You need credentials to access the APIs - it is the same credentials as your WatchWire login. The `/authenticate` will return a Token that needs to be included in the header of every subsequent request. The token renews with each request and expires after 60 minutes of inactivity (at which point you will need to re-authenticate and get a new token). > Please contact the WatchWire team for any questions or request for API credential access. # Error Codes There will be various error codes specific to the API you are using, but generally follows these principles: * `Unauthorized` - *you are unauthenticated or unauthorized to request actions on an asset* * `Asset doesn't exist` - *the item you are querying for doesn't exist* * `Server error`\- *general exception raised in our application code* # Rate limit Rate limited to 10 transactions per meter / second servers: - url: https://auth.replace-me.example.com description: Authentication service (Postman variable {{ww-api-baseurl}}) - url: https://realtime.replace-me.example.com description: RealTime API (Postman variable {{gateway-realtime-api}}) - url: https://ap.replace-me.example.com description: Accounts Payable API (Postman variable {{gateway-ap-api}}) - url: https://invoice.replace-me.example.com description: Invoice API (Postman variable {{portal-api-baseurl}}) - url: https://mv.replace-me.example.com description: Measurement & Verification API (Postman variable {{invoice-api}}) security: - BearerAuth: [] tags: - name: Authentication - name: RealTime API - Custom Meter - name: RealTime API - Meter Readings - name: RealTime API - Meter Readings Aggregations - name: RealTime API - Meter Readings Batch Operations - name: RealTime API - Obvius Meter Readings - name: Accounts Payable API - Audit Statements - name: Accounts Payable API - Nexus Statements - name: Accounts Payable API - Standard Statements - name: Accounts Payable API - Statement PDFs - name: Invoice API - Reference IDs - name: Invoice API - Invoice - name: Measurement & Verification API - M&V paths: /nexus/{statementId}/revisions: get: tags: - Accounts Payable API - Audit Statements summary: Retrieve Nexus Statement Revisions description: >- A `GET` request will list all of a Nexus statement's revisions*.* If a response is null, the statement was deleted. *Response Body Structure* | Path | Type | Description | | --- | --- | --- | | `[].response` | `Nexus Statement Model` | The statement's raw body at a given revision | | `[].timestamp` | `Timestamp` | The timestamp for a statement's revision | operationId: retrieveNexusStatementRevisions parameters: - name: statementId in: path required: true schema: type: integer description: EnergyWatch statement identifier. responses: '200': description: Successful response content: application/json: schema: type: array items: type: object properties: timestamp: type: string response: type: object properties: uuid: type: string status: type: string ww_account_id: type: integer ww_statement_id: type: integer ww_client_id: type: integer ww_control_code: type: string status_message: type: string nexus_json: type: object properties: tax: type: integer shipping: type: integer priority: type: string lines: type: array items: type: object properties: line_item_uuid: type: string invoiceitem_quantity: type: integer invoiceitem_unitprice: type: integer glaccount_number: type: string unit_id_alt: type: string utilityusagetype_name: type: string utilityaccount_accountnumber: type: string invoiceitem_description: type: string property_id_alt: type: string invoiceitem_taxflag: type: string universal_field1: type: string universal_field2: type: string universal_field3: type: string universal_field4: type: string universal_field5: type: string universal_field6: type: string universal_field7: type: string universal_field8: type: string integration_package_name: type: string property_id_alt: type: string vendor_id_alt: type: string userprofile_username: type: string invoice_datetm: type: string invoice_ref: type: string invoice_duedate: type: string invoice_period: type: string control_amount: type: integer remit_advice: type: integer invoice_private: type: integer currency_code: type: string country_code: type: string invoice_cycle_from: type: string invoice_cycle_to: type: string invoice_note: type: string invoice_budgetoverage_note: type: string universal_field1: type: string universal_field2: type: string universal_field3: type: string universal_field4: type: string universal_field5: type: string universal_field6: type: string universal_field7: type: string universal_field8: type: string invoicepayment_type: type: string example: - timestamp: '2022-01-06T14:32:43.458+00:00' response: uuid: 83c2d4bf-febc-44bd-9a97-fdb387f4199b status: NEW ww_account_id: 0 ww_statement_id: 0 ww_client_id: 0 ww_control_code: string status_message: string nexus_json: tax: 0 shipping: 0 priority: string lines: - line_item_uuid: b9cc5c2e-53d2-47fd-9521-e1f120370f20 invoiceitem_quantity: 0 invoiceitem_unitprice: 0 glaccount_number: string unit_id_alt: string utilityusagetype_name: string utilityaccount_accountnumber: string invoiceitem_description: string property_id_alt: string invoiceitem_taxflag: 'N' universal_field1: string universal_field2: string universal_field3: string universal_field4: string universal_field5: string universal_field6: string universal_field7: string universal_field8: string integration_package_name: JDE property_id_alt: '12345' vendor_id_alt: '12345' userprofile_username: EWServices invoice_datetm: '2020-12-10' invoice_ref: string invoice_duedate: '2020-12-10' invoice_period: '2020-12-10' control_amount: 0 remit_advice: 0 invoice_private: 0 currency_code: string country_code: string invoice_cycle_from: '2020-12-10' invoice_cycle_to: '2020-12-10' invoice_note: string invoice_budgetoverage_note: string universal_field1: string universal_field2: string universal_field3: string universal_field4: string universal_field5: string universal_field6: string universal_field7: string universal_field8: string invoicepayment_type: string '401': description: Unauthorized - missing, invalid or expired token security: - BearerAuth: [] servers: - url: https://ap.replace-me.example.com description: Accounts Payable API (Postman variable {{gateway-ap-api}}) components: securitySchemes: BearerAuth: type: http scheme: bearer description: >- Token returned by `POST /authenticate`. Expires after 60 minutes of inactivity. ````