> ## Documentation Index > Fetch the complete documentation index at: https://docs.apostra.com/llms.txt > Use this file to discover all available pages before exploring further. # Request buyer access > Submit buyer qualification for human review. This public form does not create an account, grant access, or establish organization or email ownership. ## OpenAPI ````yaml /v2/buyer-api-v2.yaml post /auth/buyer-signup-intake openapi: 3.0.0 info: title: Scope3 Buyer API version: 2.0.0 description: |- REST API for advertisers to manage advertisers, campaigns, and reporting. ## Authentication All endpoints require a Bearer token in the Authorization header: ``` Authorization: Bearer your-api-key ``` ## Base URL `https://api.interchange.io/api/v2/buyer` ## For AI Agents AI agents can use the MCP endpoint at `/mcp/v2/buyer` with three tools: - `initialize`: Start an MCP session - `api_call`: Make REST API calls - `ask_about_capability`: Learn about API features servers: - url: https://api.interchange.io/api/v2/buyer description: Production server security: [] tags: - name: Signup description: Request reviewed access to Interchange - name: Account description: Account management, service tokens, and preferences - name: Asks description: >- What you are waiting on Scope3 for — support, product, and supply asks in one list - name: Advertisers description: Manage advertisers - name: Product Discovery description: Discover and select products - name: Campaigns description: Manage advertising campaigns - name: Creatives description: Build, manage, and sync campaign creatives via AdCP Creative Protocol - name: Reporting description: Access performance metrics - name: Event Sources description: >- Manage event source configurations and log conversion/marketing events for attribution - name: Property Lists description: Validate property lists against AAO registry - name: Sales Agents description: View and connect sales agents - name: Measurement description: Measurement sources, records, context, and freshness - name: Syndication description: Syndicate resources to ADCP agents - name: Tasks description: Track async operation status - name: Buyer Billing description: >- Consolidated invoicing for buyers — invoices and pending invoice items issued by Scope3 across the buyer customer. - name: MCP description: Model Context Protocol endpoints for AI agents paths: /auth/buyer-signup-intake: servers: - url: https://api.interchange.io description: Production signup service post: tags: - Signup summary: Request buyer access description: >- Submit buyer qualification for human review. This public form does not create an account, grant access, or establish organization or email ownership. operationId: submitBuyerSignupIntake requestBody: required: true content: application/json: schema: type: object properties: email: type: string maxLength: 254 format: email pattern: >- ^(?!\.)(?!.*\.\.)([A-Za-z0-9_'+\-\.]*)[A-Za-z0-9_+-]@([A-Za-z0-9][A-Za-z0-9\-]*\.)+[A-Za-z]{2,}$ first_name: type: string minLength: 1 maxLength: 80 last_name: type: string minLength: 1 maxLength: 80 company: type: string minLength: 1 maxLength: 200 role: nullable: true type: string enum: - brand - agency intent: nullable: true type: string enum: - self_service - assisted_pilot - evaluate - integration_partnership - campaign_management - agent_connection - preferred_ai_chat - unsure agent_name: nullable: true type: string minLength: 1 maxLength: 200 source: default: agentic-signup type: string enum: - agentic-signup - agentic-login - marketing-site use_case: nullable: true type: string maxLength: 1000 intended_markets: default: [] maxItems: 249 type: array items: type: string minLength: 2 maxLength: 32 intended_channels: default: [] maxItems: 22 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 - audio - other waitlist_interests: maxItems: 50 type: array items: oneOf: - type: object properties: product: type: string enum: - buyer - seller country_code: type: string enum: - AD - AE - AF - AG - AI - AL - AM - AO - AQ - AR - AS - AT - AU - AW - AX - AZ - BA - BB - BD - BE - BF - BG - BH - BI - BJ - BL - BM - BN - BO - BQ - BR - BS - BT - BV - BW - BY - BZ - CA - CC - CD - CF - CG - CH - CI - CK - CL - CM - CN - CO - CR - CU - CV - CW - CX - CY - CZ - DE - DJ - DK - DM - DO - DZ - EC - EE - EG - EH - ER - ES - ET - FI - FJ - FK - FM - FO - FR - GA - GB - GD - GE - GF - GG - GH - GI - GL - GM - GN - GP - GQ - GR - GS - GT - GU - GW - GY - HK - HM - HN - HR - HT - HU - ID - IE - IL - IM - IN - IO - IQ - IR - IS - IT - JE - JM - JO - JP - KE - KG - KH - KI - KM - KN - KP - KR - KW - KY - KZ - LA - LB - LC - LI - LK - LR - LS - LT - LU - LV - LY - MA - MC - MD - ME - MF - MG - MH - MK - ML - MM - MN - MO - MP - MQ - MR - MS - MT - MU - MV - MW - MX - MY - MZ - NA - NC - NE - NF - NG - NI - NL - 'NO' - NP - NR - NU - NZ - OM - PA - PE - PF - PG - PH - PK - PL - PM - PN - PR - PS - PT - PW - PY - QA - RE - RO - RS - RU - RW - SA - SB - SC - SD - SE - SG - SH - SI - SJ - SK - SL - SM - SN - SO - SR - SS - ST - SV - SX - SY - SZ - TC - TD - TF - TG - TH - TJ - TK - TL - TM - TN - TO - TR - TT - TV - TW - TZ - UA - UG - UM - US - UY - UZ - VA - VC - VE - VG - VI - VN - VU - WF - WS - YE - YT - ZA - ZM - ZW description: An assigned ISO 3166-1 alpha-2 country code. channel: type: string enum: - audio - ctv - display - dooh - google - meta - olv - social desired_path: type: string enum: - marketplace - bring_supply - either readiness_reason: type: string enum: - product_not_ready - market_unavailable - supply_missing - supply_unknown notification_preference: type: string enum: - email notification_consent: type: object properties: key: type: string enum: - signUp.communicationOptIn.label version: type: string enum: - '2026-08-17' locale: type: string enum: - en-US renderedText: type: string enum: - >- Yes, I'd like to receive occasional emails with product updates and research reports. required: - key - version - locale - renderedText additionalProperties: false required: - product - country_code - channel - desired_path - readiness_reason - notification_preference - notification_consent additionalProperties: false - type: object properties: product: type: string enum: - buyer - seller country_code: type: string enum: - AD - AE - AF - AG - AI - AL - AM - AO - AQ - AR - AS - AT - AU - AW - AX - AZ - BA - BB - BD - BE - BF - BG - BH - BI - BJ - BL - BM - BN - BO - BQ - BR - BS - BT - BV - BW - BY - BZ - CA - CC - CD - CF - CG - CH - CI - CK - CL - CM - CN - CO - CR - CU - CV - CW - CX - CY - CZ - DE - DJ - DK - DM - DO - DZ - EC - EE - EG - EH - ER - ES - ET - FI - FJ - FK - FM - FO - FR - GA - GB - GD - GE - GF - GG - GH - GI - GL - GM - GN - GP - GQ - GR - GS - GT - GU - GW - GY - HK - HM - HN - HR - HT - HU - ID - IE - IL - IM - IN - IO - IQ - IR - IS - IT - JE - JM - JO - JP - KE - KG - KH - KI - KM - KN - KP - KR - KW - KY - KZ - LA - LB - LC - LI - LK - LR - LS - LT - LU - LV - LY - MA - MC - MD - ME - MF - MG - MH - MK - ML - MM - MN - MO - MP - MQ - MR - MS - MT - MU - MV - MW - MX - MY - MZ - NA - NC - NE - NF - NG - NI - NL - 'NO' - NP - NR - NU - NZ - OM - PA - PE - PF - PG - PH - PK - PL - PM - PN - PR - PS - PT - PW - PY - QA - RE - RO - RS - RU - RW - SA - SB - SC - SD - SE - SG - SH - SI - SJ - SK - SL - SM - SN - SO - SR - SS - ST - SV - SX - SY - SZ - TC - TD - TF - TG - TH - TJ - TK - TL - TM - TN - TO - TR - TT - TV - TW - TZ - UA - UG - UM - US - UY - UZ - VA - VC - VE - VG - VI - VN - VU - WF - WS - YE - YT - ZA - ZM - ZW description: An assigned ISO 3166-1 alpha-2 country code. channel: type: string enum: - audio - ctv - display - dooh - google - meta - olv - social desired_path: type: string enum: - marketplace - bring_supply - either readiness_reason: type: string enum: - product_not_ready - market_unavailable - supply_missing - supply_unknown notification_preference: type: string enum: - none required: - product - country_code - channel - desired_path - readiness_reason - notification_preference additionalProperties: false type: object pilot_budget: nullable: true type: string minLength: 1 maxLength: 100 pilot_timing: nullable: true type: string enum: - ready_now - one_to_three_months - later self_service_experience: nullable: true type: boolean prelaunch_slack_consent: nullable: true type: boolean website: type: string maxLength: 500 required: - email - first_name - last_name - company responses: '201': description: Request buyer access content: application/json: schema: type: object properties: success: type: boolean enum: - true data: type: object properties: ok: type: boolean enum: - true org_ref: nullable: true type: string qualification_route: type: string enum: - solutions_review - market_nurture - manual_review required: - ok - org_ref - qualification_route additionalProperties: false required: - success - data additionalProperties: false '400': description: Bad request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '409': description: >- The public intake was already claimed; sign in to update organization interests. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: [] components: schemas: ErrorResponse: type: object properties: data: type: string nullable: true enum: - null error: $ref: '#/components/schemas/ApiError' required: - data - error additionalProperties: false description: Standard error response ApiError: type: object properties: code: type: string description: Machine-readable error code message: type: string description: Human-readable error message field: description: Field path associated with the error type: string details: description: Additional error context type: object additionalProperties: {} required: - code - message additionalProperties: false description: Structured error object ````