openapi: 3.0.3
info:
  title: LinkSquares Account Attachments API
  description: 'The LinkSquares API is the public REST API for the LinkSquares AI-powered contract lifecycle management (CLM) platform. It spans two products. Analyze exposes processed agreements plus the metadata, Smart Values, terms, types, tags, and parent/child hierarchy extracted from them, and lets you import DOCX/PDF documents for AI processing. Finalize lets external systems retrieve templates, create draft/intake/request agreements, and retrieve and approve tasks. All requests authenticate with an API key passed as an `x-api-key` header; the same token is shared across Analyze and Finalize. API access is gated to LinkSquares customers and keys are self-managed by Administrator users.


    GROUNDING NOTE: The Analyze paths in this document (under /api/analyze) are CONFIRMED against the public LinkSquares API Overview and Analyze API Sample Use Cases help-center articles, including live cURL examples. The Finalize paths (under /api/finalize) are MODELED from the capability-level descriptions in the LinkSquares API Overview - LinkSquares documents that Finalize can retrieve templates, retrieve and approve tasks, and create agreements, but the concrete request paths are behind the customer-gated API reference and must be confirmed before use. Request and response schemas throughout are modeled from documented behavior and examples, not copied from an official OpenAPI definition.'
  version: '1.0'
  contact:
    name: LinkSquares
    url: https://linksquares.com
  license:
    name: Proprietary
    url: https://linksquares.com/saas-terms-of-service
servers:
- url: https://api.linksquares.com
  description: LinkSquares production API gateway
security:
- apiKeyAuth: []
tags:
- name: Attachments
  description: Additional attachments on Analyze agreements (confirmed).
paths:
  /api/analyze/v1/agreements/{agreement_id}/attachments:
    parameters:
    - $ref: '#/components/parameters/AgreementId'
    post:
      operationId: addAgreementAttachment
      tags:
      - Attachments
      summary: Add an additional attachment
      description: Adds an additional attachment to an agreement. Confirmed (v1).
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              additionalProperties: true
      responses:
        '200':
          description: The created attachment.
          content:
            application/json:
              schema:
                type: object
                additionalProperties: true
        '401':
          $ref: '#/components/responses/Unauthorized'
  /api/analyze/v2/agreements/{agreement_id}/attachments:
    parameters:
    - $ref: '#/components/parameters/AgreementId'
    get:
      operationId: listAgreementAttachments
      tags:
      - Attachments
      summary: List additional attachments
      description: Retrieves the additional attachments on an agreement. Confirmed (v2).
      responses:
        '200':
          description: A list of attachments.
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      additionalProperties: true
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
  /api/analyze/v2/agreements/{agreement_id}/attachments/{attachment_id}/download:
    parameters:
    - $ref: '#/components/parameters/AgreementId'
    - name: attachment_id
      in: path
      required: true
      description: The identifier of the attachment.
      schema:
        type: string
    get:
      operationId: downloadAgreementAttachment
      tags:
      - Attachments
      summary: Download an attachment
      description: Downloads a single attachment on an agreement. Confirmed (v2).
      responses:
        '200':
          description: The attachment binary or a download reference.
          content:
            application/octet-stream:
              schema:
                type: string
                format: binary
        '401':
          $ref: '#/components/responses/Unauthorized'
        '404':
          $ref: '#/components/responses/NotFound'
components:
  parameters:
    AgreementId:
      name: agreement_id
      in: path
      required: true
      description: The unique identifier (UUID) of the agreement.
      schema:
        type: string
        format: uuid
  schemas:
    Error:
      type: object
      properties:
        error:
          type: string
        message:
          type: string
  responses:
    Unauthorized:
      description: Missing or invalid API key.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
    NotFound:
      description: The requested resource was not found.
      content:
        application/json:
          schema:
            $ref: '#/components/schemas/Error'
  securitySchemes:
    apiKeyAuth:
      type: apiKey
      in: header
      name: x-api-key
      description: LinkSquares API key passed as an `x-api-key` header on every request. Keys are self-managed by Administrator users and are shared across the Analyze and Finalize products.