> ## Documentation Index > Fetch the complete documentation index at: https://docs.interchange.io/llms.txt > Use this file to discover all available pages before exploring further. # List media buy packages > List a media buy's packages with the attributes that identify each one: productId, productName, the package's own startTime/endTime, and its pacingPeriod (index plus the campaign's label, e.g. "Week 6"). Use this to turn a description of a package ("the display package ending 2026-08-11") into the packageId to send to an update. Prefer it over GET /campaigns/{campaignId} whenever the goal is to pick a package: it carries no targeting, creative, or format detail, so it stays small enough for an agent to read in full. A paced buy has one package per product per period, and the trailing number on a package id is dispatch order, NOT the period — read pacingPeriod instead of parsing the id. ## OpenAPI ````yaml /v2/buyer-api-v2.yaml get /media-buys/{mediaBuyId}/packages 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: Account description: Account management, service tokens, and preferences - 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: Planning Briefs description: >- Share prospective briefs with publishers and collect their fit/quote/clarify/decline/book responses (gated by the demand-supply-signals flag). - 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: /media-buys/{mediaBuyId}/packages: get: tags: - Campaigns summary: List media buy packages description: >- List a media buy's packages with the attributes that identify each one: productId, productName, the package's own startTime/endTime, and its pacingPeriod (index plus the campaign's label, e.g. "Week 6"). Use this to turn a description of a package ("the display package ending 2026-08-11") into the packageId to send to an update. Prefer it over GET /campaigns/{campaignId} whenever the goal is to pick a package: it carries no targeting, creative, or format detail, so it stays small enough for an agent to read in full. A paced buy has one package per product per period, and the trailing number on a package id is dispatch order, NOT the period — read pacingPeriod instead of parsing the id. operationId: getMediaBuyPackages parameters: - in: path name: mediaBuyId schema: description: Buyer media buy ID example: mb_ETBn4gJ9Wu type: string minLength: 1 required: true description: Buyer media buy ID responses: '200': description: List media buy packages content: application/json: schema: $ref: '#/components/schemas/BuyerMediaBuyPackagesResponse' '400': description: Bad request content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '401': description: Unauthorized content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '403': description: >- Caller is not a buyer — the route is mounted behind the buyer role guard. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '404': description: No media buy with this id owned by the caller. content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' '500': description: Internal server error content: application/json: schema: $ref: '#/components/schemas/ErrorResponse' security: - bearerAuth: [] components: schemas: BuyerMediaBuyPackagesResponse: description: >- A media buy's packages with the attributes needed to pick one, sized to be read in full by an agent. type: object properties: mediaBuyId: description: The media buy these packages belong to. example: mb_ETBn4gJ9Wu type: string isPaced: description: >- Whether this buy was split across pacing periods. When true, expect one package per product per period and use pacingPeriod to tell them apart. type: boolean packageCount: description: How many packages this media buy has. type: integer minimum: -9007199254740991 maximum: 9007199254740991 packages: description: >- The packages on this media buy, ordered by product then pacing period so the order matches how the ids were assigned. type: array items: $ref: '#/components/schemas/BuyerPackage' required: - mediaBuyId - isPaced - packageCount - packages additionalProperties: false ErrorResponse: description: Standard error response type: object properties: data: type: string nullable: true enum: - null error: $ref: '#/components/schemas/ApiError' required: - data - error additionalProperties: false BuyerPackage: description: >- One package on a media buy, carrying the attributes that identify it. Targeting, creatives, and format detail are deliberately omitted; use get_campaign for those. type: object properties: packageId: description: >- The package identifier to quote when updating or pausing this package. Treat it as an opaque string: the trailing number is a dispatch-order position, not a period number. Use pacingPeriod to identify the period. example: sf_pkg_sf_mb_1783618937177_43ycbp7b_3 type: string productId: description: >- The seller product this package buys. Together with pacingPeriod this uniquely identifies a package within its media buy. Note the nested package inside GET /campaigns/:id spells this `productIds` as a single-element array; this endpoint uses the singular form, which matches the AdCP Package field. nullable: true type: string productName: description: >- The product's name as published by the seller, when it is known locally. type: string status: description: >- Whether this package is currently buying. Independent of the media buy status: a live buy can carry a paused package. type: string enum: - active - paused - canceled pacingPeriod: allOf: - $ref: '#/components/schemas/PackagePacingPeriod' startTime: description: >- When this package starts buying (ISO 8601). Absent on packages created before the platform retained its own requested window, in which case fall back to the media buy's window. type: string format: date-time pattern: >- ^(?:(?:\d\d[2468][048]|\d\d[13579][26]|\d\d0[48]|[02468][048]00|[13579][26]00)-02-29|\d{4}-(?:(?:0[13578]|1[02])-(?:0[1-9]|[12]\d|3[01])|(?:0[469]|11)-(?:0[1-9]|[12]\d|30)|(?:02)-(?:0[1-9]|1\d|2[0-8])))T(?:(?:[01]\d|2[0-3]):[0-5]\d(?::[0-5]\d(?:\.\d+)?)?(?:Z))$ endTime: description: >- When this package stops buying (ISO 8601). This is the field to match when a buyer names a package by the date it ends. 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))$ budget: description: This package's budget, gross of buyer fees, in budgetCurrency. nullable: true type: number budgetCurrency: description: ISO-4217 currency of budget. example: USD type: string pacing: description: How the package spends its budget (even, asap, front_loaded). type: string delivery: allOf: - $ref: '#/components/schemas/BuyerPackageDelivery' required: - packageId - productId - status - budget additionalProperties: false ApiError: description: Structured error object type: object properties: code: description: Machine-readable error code type: string message: description: Human-readable error message type: string field: description: Field path associated with the error type: string details: description: Additional error context type: object additionalProperties: {} required: - code - message additionalProperties: false PackagePacingPeriod: description: >- Which pacing period a package was cut for. This is what the numeric suffix on a storefront-minted package id refers to: package ids are assigned in product-then-period order at dispatch, so the suffix is a position, not a meaning. Read this field rather than parsing the id. Absent when the media buy is not paced, and on packages created before period identity was recorded. type: object properties: index: description: >- One-based ordinal of the pacing period this package was cut for, counting from the first period on the campaign. example: 6 type: integer maximum: 9007199254740991 minimum: 1 label: description: >- The period label as named on the campaign, when the campaign named it. example: Week 6 type: string required: - index additionalProperties: false BuyerPackageDelivery: description: >- Delivery recorded against this package. Absent when the package has not delivered or the source has not reported yet. type: object properties: impressions: description: Impressions delivered against this package so far. type: number spend: description: >- Spend against this package so far, in the buy's currency, in GROSS (fee-inclusive) denomination grossed up at the buy's pinned pricing terms, so it compares directly against this package's budget. Net-as-reported for legacy buys with no pinned terms. type: number clicks: description: Clicks recorded against this package, when reported. nullable: true type: number required: - impressions - spend - clicks additionalProperties: false securitySchemes: bearerAuth: type: http scheme: bearer description: API key or access token ````