Smashgg

Smashgg (now start.gg, following its acquisition by Microsoft) is a competitive-gaming and esports platform for running tournaments, brackets, and leagues across fighting games and other titles. Its public developer API is a single GraphQL endpoint (https://api.start.gg/gql/alpha) exposing tournaments, events, entrants, sets, phases, standings, players, and users, plus mutations for reporting set results and managing seeding and brackets. Authentication is via personal access tokens (Bearer, 1-year expiry) or OAuth 2.0 authorization-code tokens scoped to a user. The original smash.gg domain now redirects to start.gg.

Smashgg publishes 1 API on the APIs.io network. Tagged areas include Company, Consumer, Esports, Gaming, and Tournaments.

Smashgg’s developer surface includes documentation, API reference, getting-started guide, authentication, support, engineering blog, and 19 more developer resources.

🌐 Visit website 📡 Source on GitHub

30.3/100 thin ▬ flat Agent 40/100 agent aware Full breakdown ↓
scored 2026-07-27 · rubric v0.5

AccessSelf serve

1 APIs 1 MCP Servers

CompanyConsumerEsportsGamingTournamentsGraphQLEventsDeveloper API

Kin Score

Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5

Composite quality — 30.3/100 · thin

Contract Quality 0.0 / 25

Developer Ergonomics 13.5 / 20

Commercial Clarity 6.8 / 20

Operational Transparency 0.7 / 13

Governance 0.0 / 12

Discoverability 9.3 / 10

Agent readiness — 40/100 · agent aware

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 15

MCP Server 12 / 12

Machine-Readable Auth 10 / 10

Idempotency 0 / 9

Stable Error Semantics 8 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 7 / 7

Typed Event Surface 0 / 6

Agent Skills 5 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/smashgg: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

APIs 1

Individual APIs this provider publishes, each with its own machine-readable definition.

start.gg GraphQL API

Single GraphQL endpoint exposing start.gg (smash.gg) tournaments, events, entrants, sets, standings, players, and users, with mutations for reporting results and managing brackets.

MCP Servers 1

Model Context Protocol servers that expose these APIs to AI agents.

smashgg-mcp.yml

MCP SERVER

Rate Limits 1

Documented rate limits and quota policies.

Scopes 1

OAuth scopes governing access to this provider's APIs.

Smashgg Scopes

4 scopes · authorizationCode

4 scopes

SCOPES

Resources

Get Started 3

Portal, sign-up, and the first successful call

DeveloperPortal

DeveloperPortal

GettingStarted

GettingStarted

Login

Documentation 2

Reference material describing how the API behaves

Documentation

Documentation

APIReference

APIReference

Agent Surfaces 3

MCP servers, agent skills, and machine-readable catalogs

MCPServer

MCPServer

LLMsTxt

LLMsTxt

AgentSkill

AgentSkill

Design & Contract 6

Pagination, idempotency, versioning, errors, and events

Conventions

ErrorCatalog

Lifecycle

Components

DataModel

Conformance

Build 2

SDKs, sample code, and the tooling you integrate with

Packages

Packages

GitHubOrganization

GitHubOrganization

Access & Security 3

Authentication, authorization, and security posture

Authentication

Authentication

OAuthScopes

OAuthScopes

DomainSecurity

DomainSecurity

Operate 2

Status, limits, changes, and where to get help

RateLimits

RateLimits

Support

Support

Commercial 2

Pricing, plans, and the legal terms of use

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: smashgg
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 17
  pass: local-v1
name: Smashgg
description: Smashgg (now start.gg, following its acquisition by Microsoft) is a competitive-gaming and esports platform for
  running tournaments, brackets, and leagues across fighting games and other titles. Its public developer API is a single
  GraphQL endpoint (https://api.start.gg/gql/alpha) exposing tournaments, events, entrants, sets, phases, standings, players,
  and users, plus mutations for reporting set results and managing seeding and brackets. Authentication is via personal access
  tokens (Bearer, 1-year expiry) or OAuth 2.0 authorization-code tokens scoped to a user. The original smash.gg domain now
  redirects to start.gg.
url: https://raw.githubusercontent.com/api-evangelist/smashgg/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- accel
x-tier: stub
x-tier-reason: portfolio-lead
accessModel:
  pricing: unknown
  onboarding: self-serve
  trial: false
  try_now: false
  public: false
  label: Self-serve signup
  confidence: medium
  source:
  - authentication
  generated: '2026-07-22'
  method: derived
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Consumer
- Esports
- Gaming
- Tournaments
- GraphQL
- Events
- Developer API
image: https://www.start.gg/favicon.ico
apis:
- name: start.gg GraphQL API
  description: Single GraphQL endpoint exposing start.gg (smash.gg) tournaments, events, entrants, sets, standings, players,
    and users, with mutations for reporting results and managing brackets.
  humanURL: https://developer.start.gg
  baseURL: https://api.start.gg/gql/alpha
  tags:
  - GraphQL
  - Esports
  - Tournaments
  properties:
  - type: GraphQL
    url: https://developer.start.gg/reference
  - type: APIExplorer
    url: https://developer.start.gg/explorer
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://www.start.gg
- type: DeveloperPortal
  url: https://developer.start.gg
- type: Documentation
  url: https://developer.start.gg/docs/intro
- type: APIReference
  url: https://developer.start.gg/reference
- type: GettingStarted
  url: https://developer.start.gg/docs/intro
- type: Authentication
  url: authentication/smashgg-authentication.yml
- type: OAuthScopes
  url: scopes/smashgg-scopes.yml
- type: Conventions
  url: conventions/smashgg-conventions.yml
- type: RateLimits
  url: rate-limits/smashgg-rate-limits.yml
- type: ErrorCatalog
  url: errors/smashgg-error-codes.yml
- type: Lifecycle
  url: lifecycle/smashgg-lifecycle.yml
- type: DomainSecurity
  url: security/smashgg-domain-security.yml
- type: Components
  url: components/smashgg-components.yml
- type: Packages
  url: packages/smashgg-packages.yml
- type: DataModel
  url: data-model/smashgg-data-model.yml
- type: Conformance
  url: conformance/smashgg-conformance.yml
- type: MCPServer
  url: mcp/smashgg-mcp.yml
- type: LLMsTxt
  url: llms/smashgg-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Support
  url: https://help.start.gg
- type: Blog
  url: https://blog.start.gg/
- type: GitHubOrganization
  url: https://github.com/smashgg
- type: Login
  url: https://www.start.gg/login
- type: TermsOfService
  url: https://www.start.gg/about/tos
- type: PrivacyPolicy
  url: https://www.start.gg/about/privacy