> ## Documentation Index > Fetch the complete documentation index at: https://docs.semicola.com/llms.txt > Use this file to discover all available pages before exploring further. # Create an advertiser (confirm currency first) ## OpenAPI ````yaml /openapi/buyer.yaml post /api/v2/buyer/advertisers openapi: 3.1.0 info: title: Semicola Exchange buyer API version: 2.0.0 description: >- Buyer endpoints: advertisers, storefronts and connections, product discovery, campaigns, proposals, media buys, creatives and reporting. Every write accepts an Idempotency-Key header. servers: - url: https://api.semicola.com security: - bearerAuth: [] - sessionCookie: [] tags: - name: Advertisers - name: Storefronts - name: Product Discovery - name: Campaigns - name: Media Buys - name: Creatives - name: Reporting - name: Event Sources - name: Webhooks - name: Tasks - name: Audit Logs paths: /api/v2/buyer/advertisers: post: tags: - Advertisers summary: Create an advertiser (confirm currency first) operationId: postBuyerAdvertisers parameters: - name: Idempotency-Key in: header required: false schema: type: string minLength: 16 maxLength: 255 pattern: ^[A-Za-z0-9_.:-]+$ requestBody: required: true content: application/json: schema: type: object properties: name: type: string minLength: 1 maxLength: 200 brand: type: string minLength: 3 primaryCurrency: type: string pattern: ^[A-Z]{3}$ description: type: string maxLength: 2000 brandCountries: type: array items: type: string pattern: ^[A-Z]{2}$ preferredTimezone: type: string channels: type: array items: type: string enum: - display - olv - social - search - ctv - linear_tv - radio - streaming_audio - podcast - dooh - ooh - print - cinema - email - gaming - retail_media - influencer - affiliate - product_placement - sponsored_intelligence sandbox: default: false type: boolean optimizationApplyMode: type: string enum: - AUTO - MANUAL required: - name - brand - primaryCurrency responses: '200': description: OK content: application/json: schema: type: object properties: data: anyOf: - type: object properties: id: type: integer exclusiveMinimum: 0 maximum: 9007199254740991 customerId: type: integer exclusiveMinimum: 0 maximum: 9007199254740991 name: type: string minLength: 1 description: type: - string - 'null' status: type: string enum: - ACTIVE - ARCHIVED sandbox: type: boolean primaryCurrency: type: string pattern: ^[A-Z]{3}$ currencyLocked: type: boolean brandDomain: type: - string - 'null' linkedBrand: anyOf: - type: object properties: domain: type: string name: type: string logoUrl: type: - string - 'null' industry: type: - string - 'null' tagline: type: - string - 'null' colors: type: array items: type: string required: - domain - name - logoUrl - industry - tagline - colors additionalProperties: false - type: 'null' brandCountries: type: array items: type: string pattern: ^[A-Z]{2}$ preferredTimezone: type: - string - 'null' channels: type: array items: type: string enum: - display - olv - social - search - ctv - linear_tv - radio - streaming_audio - podcast - dooh - ooh - print - cinema - email - gaming - retail_media - influencer - affiliate - product_placement - sponsored_intelligence optimizationApplyMode: type: string enum: - AUTO - MANUAL autonomy: anyOf: - type: object properties: inventorySelection: type: string enum: - manual - propose - automatic rebriefing: type: string enum: - manual - propose - automatic required: - inventorySelection - rebriefing additionalProperties: false - type: 'null' controls: anyOf: - type: object properties: exclusions: type: array items: type: string brandSafety: type: - string - 'null' required: - exclusions - brandSafety additionalProperties: false - type: 'null' utmConfig: anyOf: - type: array items: type: object properties: paramKey: type: string paramValue: type: string required: - paramKey - paramValue additionalProperties: false - type: 'null' frequencyCaps: anyOf: - type: array items: type: object properties: maxImpressions: type: integer exclusiveMinimum: 0 maximum: 9007199254740991 window: type: string required: - maxImpressions - window additionalProperties: false - type: 'null' createdAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$ updatedAt: type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d:[0-5]\d(?:\.\d+)?(?:Z|([+-](?:[01]\d|2[0-3]):[0-5]\d)))$ required: - id - customerId - name - description - status - sandbox - primaryCurrency - currencyLocked - brandDomain - linkedBrand - brandCountries - preferredTimezone - channels - optimizationApplyMode - autonomy - controls - utmConfig - frequencyCaps - createdAt - updatedAt additionalProperties: false - type: 'null' error: anyOf: - type: object properties: code: type: string message: type: string field: type: string details: {} required: - code - message additionalProperties: false - type: 'null' required: - data - error additionalProperties: false default: description: >- Error envelope `{data: null, error: {code, message, field?, details?}}`. components: securitySchemes: bearerAuth: type: http scheme: bearer description: API key or OAuth access token. sessionCookie: type: apiKey in: cookie name: sc_session ````