Diamond Projections API

Name: Diamond Projections — DraftKings MLB DFS Projections
Creator: Diamond Projections

Same data that powers the Diamond Projections web app, available to your agents and applications over REST and MCP. OAuth 2.1 with PKCE, API keys, and Supabase JWTs all work as bearer tokens.

REST v1

Base URL: https://diamonddfs.com/api/v1

GET /health
GET /slates
GET /slates/{date}/players
POST /optimize
POST /lineup/swap
GET /players/{id}/projection
GET /weights/presets
GET /opponent-wrc

Full OpenAPI 3.1 spec →

MCP

Endpoint: https://diamonddfs.com/api/mcp (Streamable HTTP).

Tools: get_slates, get_player_pool, get_player_projection, build_optimal_lineup, swap_player, apply_weight_preset, customize_weights, list_weight_presets, explain_projection, explain_lineup.

Auth

Personal API keys — Authorization: Bearer dp_live_...
OAuth 2.1 — POST /api/oauth/register (RFC 7591), authorize at /api/oauth/authorize, exchange at /api/oauth/token. Metadata at /.well-known/oauth-authorization-server.

Pre-built integrations

ChatGPT
Claude
Gemini