openapi: 3.1.0 info: title: Avalara 1099 & W-9 1099 Forms Attributes API description: The Avalara 1099 and W-9 API automates collection, validation, and e-filing of IRS forms including 1099 variants (1099-NEC, 1099-MISC, 1099-K, 1099-INT, 1099-DIV), 1095 forms, W-2, and 1042-S. It provides endpoints for creating, updating, managing, and filing various IRS information returns. version: '1.0' contact: name: Avalara Developer Relations url: https://developer.avalara.com/ email: developer.relations@avalara.com license: name: Apache 2.0 url: https://www.apache.org/licenses/LICENSE-2.0 termsOfService: https://legal.avalara.com/#siteterms servers: - url: https://api.avalara.com/1099/v1 description: 1099 API Production - url: https://api.sbx.avalara.com/1099/v1 description: 1099 API Sandbox security: - bearerAuth: [] tags: - name: Attributes description: Manage certificate attributes and custom fields paths: /attributes: get: operationId: listAttributes summary: Avalara List Certificate Attributes tags: - Attributes responses: '200': description: List of attributes content: application/json: schema: type: array items: $ref: '#/components/schemas/CertAttribute' components: schemas: CertAttribute: type: object properties: id: type: integer name: type: string description: type: string isSystemCode: type: boolean securitySchemes: bearerAuth: type: http scheme: bearer description: OAuth 2.0 bearer token externalDocs: description: 1099 & W-9 API Documentation url: https://developer.avalara.com/api-reference/avalara1099/avalara1099/