> ## 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.

# Initiate delta lease export (async)



## OpenAPI

````yaml /tango_lease/integrations/guides/lease-outbound.yaml get /v1/leasemgmt/delta/leases
openapi: 3.1.0
info:
  title: Tango Lease Outbound API
  version: '0.7'
  description: |
    Async **delta** REST API: client retrieves lease records that were created
    or updated since the last successful integration run. Information from
    Basic Info, Options & Terms, Contacts, Recurring Costs, and Obligations
    tabs is included. Two-call pattern with gu_id and pagination.

    NOTE: source design doc does not include a field-level mapping table; only
    a small sample (`lease_num`, `name`, `acct_type_code`) appears in the
    response example. Schema is permissive — runtime consumers should rely on
    the production payload as the source of truth and add Open Questions
    documented in the Markdown.
  x-direction: outbound
  x-source: Tango
  x-destination: Client System
servers:
  - url: https://api.tangoanalytics.com
    description: Production
  - url: https://testapi.tangoanalytics.com
    description: Test (SIT/UAT)
security:
  - xClientHeader: []
    xApiKeyHeader: []
tags:
  - name: Leases (Delta)
  - name: Status
paths:
  /v1/leasemgmt/delta/leases:
    get:
      tags:
        - Leases (Delta)
      summary: Initiate delta lease export (async)
      operationId: getLeasesDelta
      parameters:
        - $ref: '#/components/parameters/XClient'
        - $ref: '#/components/parameters/XApiKey'
      responses:
        '200':
          description: Async ack with gu_id.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/AcceptedResponse'
components:
  parameters:
    XClient:
      name: x-client
      in: header
      required: true
      schema:
        type: string
    XApiKey:
      name: x-api-key
      in: header
      required: true
      schema:
        type: string
  schemas:
    AcceptedResponse:
      type: object
      required:
        - status
      properties:
        status:
          type: string
          enum:
            - OK
            - Error
        status_message:
          type: string
        gu_id:
          type: string
          format: uuid
  securitySchemes:
    xClientHeader:
      type: apiKey
      in: header
      name: x-client
    xApiKeyHeader:
      type: apiKey
      in: header
      name: x-api-key

````