# Yahoo

**Canonical:** https://apis.io/providers/yahoo/  
**Website:** https://www.yahoo.com/  
**APIs profiled:** 5

Yahoo is a consumer internet and advertising-technology company operating Yahoo Mail, Yahoo Finance, Yahoo Sports and Yahoo Search alongside one of the largest independent demand-side platforms in programmatic advertising. Its public API surface splits cleanly in two. On the consumer side, the Yahoo Fantasy Sports API exposes fantasy football, baseball, basketball and hockey game, league, team, player, roster and transaction data over a composed URI tree at fantasysports.yahooapis.com, secured by a three-legged OAuth 2.0 flow against the Yahoo identity service, which itself publishes a full OpenID Connect discovery document. On the enterprise side, Yahoo Ad Tech ships the DSP Traffic API for programmatic campaign management, the DSP Reporting API for large-scale campaign measurement, the server-to-server Yahoo Conversion API, and the DataX API for audience and taxonomy exchange with data partners - all gated behind an existing DSP seat or a partner onboarding agreement and authenticated with a two-legged client-credentials JWT flow. Yahoo publishes no OpenAPI for any of these surfaces, distributing a public Postman collection and an llms.txt documentation index instead.

## Kin Score — 36.0 / 100 (thin)

Scored 2026-08-30 under rubric 0.17.2. Trend: flat (+0.0 from 36.0).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 44.7 |
| Developer Ergonomics | 57.1 |
| Commercial Clarity | 42.1 |
| Access Clarity | 42.1 |

## Agent readiness — 19.6 (agent-aware)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | documented |
| Auth Clarity | served |
| Idempotency | no |
| Error Semantics | documented |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |
| Delegated Identity | served |
| Protected Resource Metadata | no |
| Dynamic Client Registration | no |
| Agentic Commerce | no |

## Access

Application or Customer Gated — onboarding: unknown, pricing: unknown, trial: no (confidence: high).

## APIs (5)

- **Yahoo Fantasy Sports API** — The Fantasy Sports APIs provide URIs used to access fantasy sports data, supporting retrieval of Fantasy Football, Baseball, Basketball and Hockey data including game, league, t...
- **Yahoo DSP Traffic API** — RESTful campaign-management API for the Yahoo demand-side platform. Exposes the full trafficking hierarchy - seats, account groups, advertisers, campaigns, packages, lines, ads ...
- **Yahoo DSP Reporting API** — Asynchronous large-scale reporting API for Yahoo DSP campaign data. A Reporting object - composed of reportOption, limitSpec, filterOption, having and spec sub-objects plus acco...
- **Yahoo Conversion API** — Server-to-server conversion-event API (CAPI) for campaign measurement, attribution and optimization, positioned as the successor to browser-side Dot Pixel tracking. Two specific...
- **Yahoo Ad Tech DataX API** — Partner-facing data-exchange API for uploading and managing audience taxonomies, user and audience membership, fees and measurement feeds, plus a Real-Time API (specification v2...

## Security (3)

- **Yahoo Authentication** — 3 schemes
- **Yahoo Domain Security** — TLSv1.3 · HSTS · DMARC
- **Yahoo Vulnerability Disclosure** — Intigriti · security.txt · contact published

## Plans (1)

- **Yahoo Plans Pricing**

## Tags

Advertising, Programmatic Advertising, Demand-Side Platform, Fantasy Sports, Sports Data, Identity, OpenID Connect, Authentication, Audience Data, Media, Reporting, Conversion Tracking

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