League · Domain Security

League Domain Security

Domain security

Domain security posture for League, probed live across 3 host(s) and 1 registrable domain(s). 3 host(s) serve HTTPS (up to TLSv1.3); 2 advertise HSTS. Email/DNS controls: DNSSEC absent, SPF present, DMARC present (p=reject).

CompanyHealthHealthcareDigital HealthHealth BenefitsInteroperabilityFHIRAgentsArtificial IntelligencePatient EngagementInsuranceSoftware-as-a-Service

Transport & Host Security

league.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: no · cert expires: Oct 23 06:41:09 2026 GMT
api.league.com
HTTPS: yes · TLS: TLSv1.3 · HSTS: yes · cert expires: Nov 11 08:06:38 2026 GMT
app.league.com
HTTPS: yes · HSTS: yes

Domain (DNS/Email) Security

league.com
DNSSEC: no · SPF: yes · DMARC: yes (p=reject) · CAA: yes

Source

Domain Security

league-domain-security.yml Raw ↑
generated: '2026-08-25'
method: probed
source: live DNS/TLS/HTTP probes of apis.yml + OpenAPI hosts
hosts:
- host: league.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Oct 23 06:41:09 2026 GMT
  hsts: null
  hsts_note: 'NOT observed. A 200 GET of https://league.com/robots.txt returned no Strict-Transport-Security
    header (server: cloudflare). The marketing origin does not set HSTS even though the API and app hosts
    do.'
- host: api.league.com
  https: true
  tls_version: TLSv1.3
  cert_expires: Nov 11 08:06:38 2026 GMT
  hsts: max-age=31536000; includeSubDomains; preload
  hsts_max_age: 31536000
  hsts_include_subdomains: true
  hsts_preload: true
  hsts_note: Observed directly on a live GET https://api.league.com/ (2026-08-25). The automated probe
    recorded null because the host answers 404 on /; the header is present regardless of status.
- host: app.league.com
  https: true
  hsts: max-age=31536000; includeSubDomains
  hsts_max_age: 31536000
  hsts_include_subdomains: true
  hsts_preload: false
  hsts_note: Observed on a live 200 GET (2026-08-25). Added by hand — not in apis.yml hosts at probe time.
domains:
- domain: league.com
  dnssec: false
  caa:
  - 0 issuewild "ssl.com"
  - 0 issue "amazon.com"
  - 0 issue "comodoca.com"
  - 0 issue "digicert.com; cansignhttpexchanges=yes"
  - 0 issue "geotrust.com"
  - 0 issue "letsencrypt.org"
  spf: true
  dmarc: true
  dmarc_policy: reject
note: HSTS values corrected/added from direct header observation on 2026-08-25. DNSSEC is NOT enabled
  on league.com; CAA, SPF and DMARC are all present, with DMARC at p=reject — a strong email posture.
  The gap worth naming is DNSSEC, and HSTS missing on the marketing origin while present on api. and app.

Work with this as data

Every security artifact 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 security posture

4 MCP tools reach this
  • find_securityBrowse and filter every security artifact in the catalog.
  • 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 security artifact
curl "https://apis.io/api/v1/security/league-domain-security"
All security posture
curl "https://apis.io/api/v1/security?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.