# Sleeper

**Canonical:** https://apis.io/providers/sleeper/  
**Website:** https://docs.sleeper.com/  
**APIs profiled:** 8

Sleeper is a fantasy sports platform — a mobile-first app for creating and managing fantasy football, basketball, and other sports leagues with chat, drafts, waivers, and real-time scoring built in. Sleeper publishes a free, read-only HTTP API at api.sleeper.app that exposes public fantasy data: users, leagues, rosters, matchups, transactions, drafts, draft picks, traded picks, trending players, and the current sport/season state. The API requires no API token or OAuth because no content can be modified through it; every endpoint is a GET request returning JSON, and callers are asked to stay under 1,000 requests per minute to avoid IP blocks. Sleeper is backed by a16z and General Catalyst.

## Kin Score — 29.6 / 100 (thin)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 29.6).

| Facet | Score |
|---|---|
| Discoverability | 81.5 |
| Contract Quality | 12.7 |
| Governance | 16.7 |
| Contract Governance | 16.7 |
| Operational Transparency | 0.0 |
| Developer Ergonomics | 47.0 |
| Commercial Clarity | 34.2 |
| Access Clarity | 34.2 |

## Agent readiness — 33.9 (agent-aware)

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

## Access

Unknown — onboarding: unknown, pricing: unknown, trial: no (confidence: low).

## APIs (8)

- **Sleeper Drafts API** — The Drafts API from Sleeper — 6 operation(s) for drafts.
- **Sleeper Leagues API** — The Leagues API from Sleeper — 4 operation(s) for leagues.
- **Sleeper Matchups API** — The Matchups API from Sleeper — 1 operation(s) for matchups.
- **Sleeper Players API** — The Players API from Sleeper — 2 operation(s) for players.
- **Sleeper Playoffs API** — The Playoffs API from Sleeper — 2 operation(s) for playoffs.
- **Sleeper State API** — The State API from Sleeper — 1 operation(s) for state.
- **Sleeper Transactions API** — The Transactions API from Sleeper — 1 operation(s) for transactions.
- **Sleeper Users API** — The Users API from Sleeper — 1 operation(s) for users.

## MCP servers (1)

- **Sleeper MCP Server**

## Security (2)

- **Sleeper Authentication** — none · 0 schemes
- **Sleeper Domain Security** — TLSv1.3 · HSTS · DMARC

## Tags

Company, Fantasy Sports, Sports, Fantasy Football, Gaming, Sports Data, Leagues, Consumer

---

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