Yahoo

aid: yahoo
name: Yahoo
description: 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.
type: Index
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: gated
  onboarding: application
  trial: false
  try_now: false
  public: false
  label: Application or Customer Gated
  confidence: high
  source:
  - plans
  - docs
  generated: '2026-08-28'
  method: searched
position: Consumer
access: 3rd-Party
image: https://kinlane-images.s3.amazonaws.com/shared/apis-json/icons/yahoo.png
tags:
- Advertising
- Programmatic Advertising
- Demand-Side Platform
- Fantasy Sports
- Sports Data
- Identity
- OpenID Connect
- Authentication
- Audience Data
- Media
- Reporting
- Conversion Tracking
tags_raw:
- Advertising
- Programmatic Advertising
- Demand Side Platform
- Fantasy Sports
- Sports Data
- Identity
- OpenID Connect
- OAuth
- Audience Data
- Media
- Reporting
- Conversion Tracking
created: '2025-02-08'
modified: '2026-08-28'
url: https://raw.githubusercontent.com/api-evangelist/yahoo/refs/heads/main/apis.yml
specificationVersion: '0.23'
common:
- type: Website
  url: https://www.yahoo.com/
- type: DeveloperPortal
  url: https://developer.yahoo.com/
- type: Documentation
  url: https://developer.yahoo.com/api/
- type: GettingStarted
  url: https://developer.yahoo.com/oauth2/guide/
- type: SignUp
  url: https://developer.yahoo.com/apps/create/
- type: Support
  url: https://yahoo.uservoice.com/forums/182455-yahoo-developer-network
- type: Blog
  url: https://developer.yahoo.com/blogs/
- type: TermsOfService
  url: https://policies.yahoo.com/us/en/yahoo/terms/product-atos/apiforydn/index.htm
- type: PrivacyPolicy
  url: https://legal.yahoo.com/us/en/yahoo/privacy/products/developer/index.html
- type: Postman
  url: https://www.postman.com/yahoodsp/workspace/public
- type: GitHubOrganization
  url: https://github.com/yahoo
- type: LinkedIn
  url: https://www.linkedin.com/company/yahoo
- type: Security
  url: security/yahoo-vulnerability-disclosure.yml
- type: VulnerabilityDisclosure
  url: security/yahoo-vulnerability-disclosure.yml
- type: DomainSecurity
  url: security/yahoo-domain-security.yml
- type: SecurityTxt
  url: well-known/yahoo-security.txt
- type: WellKnown
  url: well-known/yahoo-well-known.yml
- type: LLMsTxt
  url: llms/yahoo-llms.txt
- type: Authentication
  url: authentication/yahoo-authentication.yml
- type: OAuthScopes
  url: scopes/yahoo-scopes.yml
- type: RateLimits
  url: rate-limits/yahoo-rate-limits.yml
- type: Plans
  url: plans/yahoo-plans-pricing.yml
- type: ErrorCatalog
  url: errors/yahoo-error-codes.yml
- type: Lifecycle
  url: lifecycle/yahoo-lifecycle.yml
- type: Deprecation
  url: lifecycle/yahoo-lifecycle.yml
- type: ChangeLog
  url: changelog/yahoo-changelog.yml
- type: Conventions
  url: conventions/yahoo-conventions.yml
- type: Conformance
  url: conformance/yahoo-conformance.yml
- type: Packages
  url: packages/yahoo-packages.yml
- type: DataModel
  url: data-model/yahoo-data-model.yml
- type: Components
  url: components/yahoo-components.yml
apis:
- aid: yahoo:yahoo
  name: Yahoo Fantasy Sports API
  description: 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, team, player, roster and transaction information. The APIs
    follow a composed-URI model in which resources like game, league, team and player and collections like games, leagues,
    teams and players are stacked as path segments and filtered with semicolon matrix parameters, so a single request can
    return a player nested inside its league. Responses are XML by default with JSON available via format=json. Access requires
    a registered Yahoo app and a three-legged OAuth 2.0 authorization-code grant.
  humanURL: https://sports.yahoo.com/developer
  baseURL: https://fantasysports.yahooapis.com/fantasy/v2
  tags:
  - Fantasy Sports
  - Sports Data
  - Consumer
  properties:
  - type: Documentation
    url: https://sports.yahoo.com/developer
  - type: APIReference
    url: https://sports.yahoo.com/developer/docs/
  - type: GettingStarted
    url: https://developer.yahoo.com/oauth2/guide/flows_authcode/
  - type: SignUp
    url: https://developer.yahoo.com/apps/create/
  - type: Authentication
    url: authentication/yahoo-authentication.yml
  - type: DataModel
    url: data-model/yahoo-data-model.yml
- aid: yahoo:dsp-traffic-api
  name: Yahoo DSP Traffic API
  description: RESTful campaign-management API for the Yahoo demand-side platform. Exposes the full trafficking hierarchy
    - seats, account groups, advertisers, campaigns, packages, lines, ads and creatives - plus audiences of nine types, contextuals,
    supply lists, deals, exchanges, pixels, bid multipliers, targeting and audit logs. Authentication is a two-legged OAuth
    2.0 client-credentials flow whose token is presented in Yahoo's own X-Auth-Token header rather than Authorization. Campaigns
    cannot be deleted through the API; state is managed by status transition. A live GET /traffic/ratelimit endpoint returns
    the caller's own quota and remaining balance.
  humanURL: https://help.yahooinc.com/dsp-api/docs/yahoo-dsp-traffic-api
  baseURL: https://dspapi.admanagerplus.yahoo.com/traffic/
  tags:
  - Advertising
  - Programmatic Advertising
  - Demand-Side Platform
  - Campaign Management
  tags_raw:
  - Advertising
  - Programmatic Advertising
  - Demand Side Platform
  - Campaign Management
  properties:
  - type: Documentation
    url: https://help.yahooinc.com/dsp-api/docs/dsp-api-help-home/
  - type: APIReference
    url: https://help.yahooinc.com/dsp-api/docs/about-the-traffic-api
  - type: GettingStarted
    url: https://help.yahooinc.com/dsp-api/docs/setup-access-guide
  - type: Authentication
    url: authentication/yahoo-authentication.yml
  - type: RateLimits
    url: rate-limits/yahoo-rate-limits.yml
  - type: ChangeLog
    url: https://help.yahooinc.com/dsp-api/docs/traffic-api-release-notes
  - type: Deprecation
    url: https://help.yahooinc.com/dsp-api/docs/traffic-api-deprecations
  - type: Postman
    url: https://www.postman.com/yahoodsp/workspace/public
  - type: Conventions
    url: conventions/yahoo-conventions.yml
- aid: yahoo:dsp-reporting-api
  name: Yahoo DSP Reporting API
  description: Asynchronous large-scale reporting API for Yahoo DSP campaign data. A Reporting object - composed of reportOption,
    limitSpec, filterOption, having and spec sub-objects plus account IDs, date type, interval type and currency - is POSTed
    to create a report, then polled by customerReportId until a CSV download URL is returned, valid for 24 hours. Reports
    may be up to 20 GB, are capped at 500,000 rows per seat per day, and can reach back 13 months. The API publishes an enumerated
    E-prefixed error-code table.
  humanURL: https://help.yahooinc.com/dsp-api/docs/reporting-api
  baseURL: http://api-sched-v3.admanagerplus.yahoo.com/yamplus_api/extreport/
  tags:
  - Advertising
  - Reporting
  - Analytics
  - Demand-Side Platform
  tags_raw:
  - Advertising
  - Reporting
  - Analytics
  - Demand Side Platform
  properties:
  - type: Documentation
    url: https://help.yahooinc.com/dsp-api/docs/reporting-api
  - type: APIReference
    url: https://help.yahooinc.com/dsp-api/docs/resources
  - type: Authentication
    url: authentication/yahoo-authentication.yml
  - type: RateLimits
    url: rate-limits/yahoo-rate-limits.yml
  - type: ErrorCatalog
    url: errors/yahoo-error-codes.yml
  - type: ChangeLog
    url: https://help.yahooinc.com/dsp-api/docs/reporting-api-release-notes
  - type: Deprecation
    url: https://help.yahooinc.com/dsp-api/docs/reporting-api-deprecations
  x-note: Yahoo documents this endpoint over plain http, not https, in its own Resources article. Recorded verbatim rather
    than silently upgraded.
- aid: yahoo:conversion-api
  name: Yahoo Conversion API
  description: Server-to-server conversion-event API (CAPI) for campaign measurement, attribution and optimization, positioned
    as the successor to browser-side Dot Pixel tracking. Two specifications are published - a Standard variant using the conversion
    structures already present in the Yahoo DSP and Dot Pixel, and a Product variant supporting product-level events for the
    Yahoo In-Flight Outcomes solution. Requires its own direct OAuth 2.0 setup separate from the DSP Traffic API. Third-party
    integrations exist through LiveRamp, Narrative and Hightouch.
  humanURL: https://help.yahooinc.com/dsp-api/docs/yahoo-conversion-api
  baseURL: https://batch.datax.yahoo.com/v1/events/
  tags:
  - Advertising
  - Conversion Tracking
  - Attribution
  - Server-Side Events
  tags_raw:
  - Advertising
  - Conversion Tracking
  - Attribution
  - Server Side Events
  properties:
  - type: Documentation
    url: https://help.yahooinc.com/dsp-api/docs/yahoo-conversion-api
  - type: APIReference
    url: https://help.yahooinc.com/dsp-api/docs/standard-yahoo-conversion-api
  - type: Authentication
    url: authentication/yahoo-authentication.yml
  - type: ChangeLog
    url: https://help.yahooinc.com/dsp-api/docs/conversion-api-release-notes
  - type: Deprecation
    url: https://help.yahooinc.com/dsp-api/docs/conversion-api-deprecations
- aid: yahoo:datax-api
  name: Yahoo Ad Tech DataX API
  description: 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 v2.0), a Partner Match data-in API and exposure-log delivery
    to Amazon S3, Microsoft Azure and Google Cloud. Onboarding is a manual RSA key exchange with Yahoo data operations. It
    is the only Yahoo API surface with hypermedia affordances, returning typed link relations under datax.yahooapis.com/rels/
    and opaque resource links. GDPR handling - jurisdiction flags, IAB TCF consent purpose bits and opt-out semantics - is
    documented in depth.
  humanURL: https://help.yahooinc.com/datax/docs/yahoo-ad-tech-datax-api-specifications
  baseURL: https://datax.yahooapis.com/v1
  tags:
  - Advertising
  - Audience Data
  - Data Exchange
  - Taxonomy
  - GDPR
  properties:
  - type: Documentation
    url: https://help.yahooinc.com/datax/docs/yahoo-ad-tech-datax-api-specifications
  - type: APIReference
    url: https://help.yahooinc.com/datax/docs/overview
  - type: GettingStarted
    url: https://help.yahooinc.com/datax/docs/security-authentication
  - type: Authentication
    url: authentication/yahoo-authentication.yml
  - type: RateLimits
    url: https://help.yahooinc.com/datax/docs/rate-limits-1
  - type: Deprecation
    url: https://help.yahooinc.com/datax/docs/batch-deprecations
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
x-mcp-status: Yahoo announced on 2025-08-25 that DSP developers "will have direct access to Model Context Protocol (MCP) servers"
  for planning, activation, reporting and custom workflow integration. As of this pass no endpoint, package or tool list is
  published. See mcp/yahoo-mcp.yml.
x-contract-discovery:
  probed: '2026-08-28'
  result: no machine-readable API contract published
  detail: /openapi.json, /openapi.yaml, /swagger.json, /api-docs, /redoc probed on developer.yahoo.com, developer.yahooinc.com,
    help.yahooinc.com, api.login.yahoo.com, dspapi.admanagerplus.yahoo.com and fantasysports.yahooapis.com - every one 403
    or 404. No /graphql surface. No /.well-known/agent-card.json or /.well-known/agent.json on any host. No AsyncAPI, no .proto
    in github.com/yahoo, no ?wsdl. The only machine-readable client artifact Yahoo publishes is the public Postman collection
    under the yahoodsp workspace.
x-enrichment:
  date: '2026-08-28'
  status: enriched
  artifacts_added: 15
  pass: local-v1