# Scope3

**Canonical:** https://apis.io/providers/scope3/  
**Website:** https://scope3.com  
**APIs profiled:** 16

Scope3 is the source of truth for greenhouse-gas emissions data in media and advertising, and operates Scope3 Interchange, an agentic advertising platform where buyer agents and seller storefronts transact on the open Ad Context Protocol (AdCP). Its APIs let buyers, publishers and platforms measure the carbon footprint of every ad impression and creative across channels, benchmark against country/channel percentiles, and run AI-driven programmatic advertising end to end. Scope3 publishes four OpenAPI documents across three surfaces: the Carbon Calculator (Measurement) API at api.scope3.com/v2, the AI Impact Measurement API at aiapi.scope3.com (energy, gCO2e and water per inference), and the Interchange Buyer and Storefront v2 APIs at api.interchange.io with 481 operations between them. Interchange is built for AI agents as primary callers: hosted remote MCP endpoints with OAuth (RFC 8414 metadata, dynamic client registration, PKCE), an A2A agent card, three published Agent Skills, a documented error envelope, IETF draft-7 rate-limit headers and a published IU pricing model. Backed by GV.

## Kin Score — 67.2 / 100 (exemplar)

Scored 2026-08-17 under rubric 0.11.0. Trend: rising (+14.8 from 52.4).

| Facet | Score |
|---|---|
| Discoverability | 92.6 |
| Contract Quality | 59.9 |
| Governance | 11.5 |
| Operational Transparency | 68.4 |
| Developer Ergonomics | 87.0 |
| Commercial Clarity | 76.3 |

## Agent readiness — 70.1 (agent-native)

| Dimension | Value |
|---|---|
| Spec Presence | yes |
| Agentic Access | derived |
| MCP Server | yes |
| Auth Clarity | yes |
| Idempotency | documented |
| Error Semantics | verified |
| OpenAPI Examples | partial |
| Rate Limit Signal | documented |
| Event Surface Described | yes |
| Agent Skills | yes |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | near-conformant |
| Dry Run Mode | no |

## Access

Self-serve signup — onboarding: self-serve, pricing: unknown, trial: no (confidence: medium).

## APIs (16)

- **Scope3 Interchange Buyer API** — The buyer side of Scope3 Interchange, the Interchange for agent-to-agent advertising: 212 published operations covering advertisers, campaigns, product discovery, creatives, med...
- **Scope3 Interchange Storefront API** — The seller side of Scope3 Interchange: 269 published operations covering storefronts, inventory sources, ad-server catalog and buyer routing, signals, proposals, approvals, stor...
- **Scope3 AI Impact Measurement API** — The AI Impact Measurement API from Scope3 — 1 operation(s) for ai impact measurement.
- **Scope3 Benchmarks API** — The Benchmarks API from Scope3 — 1 operation(s) for benchmarks.
- **Scope3 Creative API** — The Creative API from Scope3 — 1 operation(s) for creative.
- **Scope3 Data API** — The Data API from Scope3 — 2 operation(s) for data.
- **Scope3 Gpu API** — The Gpu API from Scope3 — 2 operation(s) for gpu.
- **Scope3 Impact API** — The Impact API from Scope3 — 1 operation(s) for impact.
- **Scope3 Measure API** — The Measure API from Scope3 — 1 operation(s) for measure.
- **Scope3 Model API** — The Model API from Scope3 — 4 operation(s) for model.
- **Scope3 Node API** — The Node API from Scope3 — 2 operation(s) for node.
- **Scope3 Reload API** — The Reload API from Scope3 — 1 operation(s) for reload.
- **Scope3 Saved Lists API** — The Saved Lists API from Scope3 — 1 operation(s) for saved lists.
- **Scope3 Segment API** — The Segment API from Scope3 — 2 operation(s) for segment.
- **Scope3 Signals API** — The Signals API from Scope3 — 1 operation(s) for signals.
- **Scope3 Status API** — The Status API from Scope3 — 1 operation(s) for status.

## MCP servers (1)

- **scope3-mcp.yml**

## Agentic access (1)

- **Scope3 Agentic Access** — 30 operations · 17 acting

## Security (2)

- **Scope3 Authentication** — http/oauth2/openIdConnect · 4 schemes
- **Scope3 Domain Security** — TLSv1.3 · HSTS · DNSSEC · DMARC

## Plans (1)

- **Scope3 Plans Pricing**

## Tags

Company, Enterprise, Advertising, Carbon Emissions, Sustainability, AdTech, Measurement, Artificial Intelligence, Agentic, AdCP, MCP, Programmatic, Media Buying, Publishing

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/scope3/). Scores are computed from the provider's own public artifacts under a published rubric.