League Platform API

The League platform API, served from the Kong-fronted gateway at api.league.com. Unauthenticated requests return an RFC-shaped JSON:API error document (content-type application/vnd.api+json) and carry x-ratelimit-limit-360 / x-ratelimit-remaining-360 response headers, confirming a live, rate-limited production gateway. Access is provisioned per customer as API Keys under the League Developer Program Terms; no public API reference or machine-readable contract is published.

Work with this as data

Every API here is available over the APIs.io API and to AI agents over MCP.

MCP server

One button, every client — Claude, Cursor, VS Code and the rest.

https://apis.io/mcp

Tools for apis

7 MCP tools reach this
  • find_apisBrowse and filter every API in the catalog.
  • get_api_artifactsOne API's artifacts, grouped by type.
  • get_openapiThe primary OpenAPI for this API.
  • find_similar_apisAPIs that look like this one.
  • apis_io_searchSTART HERE — APIs, providers and tags for one query, each with its total.
  • resolveTurn a domain, URL or GitHub org into the provider it belongs to.
  • find_cohortsEvery scored population of providers in the catalog.
All 92 tools →

Call it yourself

curl for this page
This API
curl "https://apis.io/api/v1/apis/league-platform-api"
All apis
curl "https://apis.io/api/v1/apis?limit=25"

Discovery needs no key. Ratings and market analysis are Pro.

Get an API key

Free tier, no email required.

A second provider on the same verified email joins the account you already have.

API entry from apis.yml

apis.yml Raw ↑
name: League Platform API
description: The League platform API, served from the Kong-fronted gateway at api.league.com. Unauthenticated
  requests return an RFC-shaped JSON:API error document (content-type application/vnd.api+json) and carry
  x-ratelimit-limit-360 / x-ratelimit-remaining-360 response headers, confirming a live, rate-limited
  production gateway. Access is provisioned per customer as API Keys under the League Developer Program
  Terms; no public API reference or machine-readable contract is published.
humanURL: https://league.com/digital-healthcare-developer-program/
baseURL: https://api.league.com
tags:
- Health
- FHIR
- Platform
properties:
- type: RateLimits
  url: rate-limits/league-rate-limits.yml
- type: ErrorCatalog
  url: errors/league-problem-types.yml
- type: Authentication
  url: authentication/league-authentication.yml
- type: Conventions
  url: conventions/league-conventions.yml