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Welcome to Scope3 Agentic API

The Scope3 Agentic API is an AI-first platform for advertising campaign management, media-quality optimization, and inventory commerce. It speaks both REST and the Model Context Protocol (MCP), so humans and agents share the same surface.

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What’s new in v2

  • Storefront-first marketplace — sellers register storefronts (their own commerce surface), with AAO compliance and a discoverable inventory catalog
  • Generic MCP wrapper — three tools (health, ask_about_capability, api_call) replace the per-domain tool sprawl of v1
  • Skill-driven discovery — agents read a single skill.md URL to learn the entire API surface, no SDK required
  • Measurement engine — first-class belief-state tracking and incrementality tests baked into campaign reporting
  • Unified buyer/storefront roles — clear separation between media buying and inventory selling, with role-specific OpenAPI specs and skill files
  • OAuth + API keys — OAuth for AI agent connectors (Claude, ChatGPT), API keys for CLIs and custom integrations

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Core concepts

Two sides share one platform:
  • Buyers (brands, agencies, ad-tech) plan and execute media. The top-level container is an Advertiser, under which Campaigns define flight, budget, audiences, and goals. Executing a campaign produces Media Buys (one per sales agent), each made of Packages (one per product per pacing period) that report Delivery metrics.
  • Storefronts (publishers, SSPs, retail media networks) expose inventory. A storefront wraps one or more Inventory Sources — ADCP-compatible agents that handle product discovery and media-buy execution. Buyers register Credentials per source where the source requires them.
Buyer side:                          Storefront side:
  Advertiser                           Storefront
    └── Campaign                          └── Inventory Source(s)   (ADCP agent)
          └── Media Buy                          └── Buyer Credentials
                └── Package                            └── Customer accounts
                      └── Delivery
Each object has a dedicated guide; the Philosophy primer explains the design choices behind them (SESOFI, ADCP-by-default, AAO marketplace gating, sandbox-first).

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Choose your journey

Buyer onboarding

Brands, agencies, and ad platforms — connect, create advertisers, and launch your first campaign.

Storefront onboarding

Publishers and SSPs — register your storefront, expose inventory, and accept buyer demand.

API Reference

Browse every REST endpoint with request/response schemas.
Migrating from v1? See the Migration Guide for a side-by-side mapping of v1 endpoints and tools to their v2 equivalents.

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What’s next?

New to the platform? Read the Philosophy primer for the conceptual model behind storefronts, signals, and the agent-first design before diving into setup.

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Support

For technical support, contact us at support@scope3.com.