# Smashgg

**Canonical:** https://apis.io/providers/smashgg/  
**Website:** https://www.start.gg  
**APIs profiled:** 1

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.

## Kin Score — 28.7 / 100 (thin)

Scored 2026-08-21 under rubric 0.12.0. Trend: flat (+0.0 from 28.7).

| Facet | Score |
|---|---|
| Discoverability | 75.9 |
| Contract Quality | 0.0 |
| Governance | 18.2 |
| Contract Governance | 18.2 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 51.8 |
| Commercial Clarity | 27.6 |
| Access Clarity | 27.6 |

## Agent readiness — 16.0 (agent-aware)

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

## Access

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

## APIs (1)

- **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)

- **Smashgg MCP Server**

## Security (2)

- **Smashgg Authentication** — http/oauth2 · 2 schemes
- **Smashgg Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Consumer, Esports, Gaming, Tournaments, GraphQL, Event, Developer API

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