First Day Entertainment website screenshot

First Day Entertainment

First Day Entertainment Inc. is a Sunnyvale, California game studio building AI-powered games, founded by Stephen Gou (formerly a founding engineer at Cohere) and Mike Mei, and funded by the a16z SPEEDRUN accelerator (batch 002) and MiraclePlus. The studio ships two titles - Heroes of Magic & Cards, a poker deckbuilding roguelike distributed on Steam, and Mana Land, a single-player RPG in which players adventure alongside conversational AI companions, published on itch.io. First Day Entertainment is a consumer games company; it publishes no public developer portal, API documentation, or machine-readable API artifacts as of this enrichment pass.

First Day Entertainment is profiled on the APIs.io network. Tagged areas include Company, Games, Gaming, Artificial Intelligence, and Entertainment.

🌐 Visit website 📡 Source on GitHub
7.4/100 minimal ▬ flat Agent 0/100 human only Full breakdown ↓
scored 2026-07-27 · rubric v0.5
0 APIs
CompanyGamesGamingArtificial IntelligenceEntertainmentConsumerStartup

Kin Score

Kin Score Kin Score How this is scored →
scored 2026-07-27 · rubric v0.5
Composite quality — 7.4/100 · minimal
Contract Quality 0.0 / 25
Developer Ergonomics 0.0 / 20
Commercial Clarity 0.0 / 20
Operational Transparency 0.7 / 13
Governance 0.0 / 12
Discoverability 6.8 / 10
Agent readiness — 0/100 · human only
Machine-Readable Contract 0 / 18
Agentic Access Contract 0 / 15
MCP Server 0 / 12
Machine-Readable Auth 0 / 10
Idempotency 0 / 9
Stable Error Semantics 0 / 8
Request/Response Examples 0 / 7
Rate-Limit Signaling 0 / 7
Typed Event Surface 0 / 6
Agent Skills 0 / 5
Well-Known Catalog 0 / 4
Consent & Bot Identity 0 / 3
Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. This rating is computed from github.com/api-evangelist/first-day-entertainment: open an issue to ask a question, or submit a pull request to add artifacts. Want it done for you? Prioritized profiling — $2,500 →

Security Posture 1

Authentication, domain security, vulnerability disclosure, and trust-center signals.

First Day Entertainment Domain Security

TLSv1.3 · HSTS

SECURITY

Resources

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt
LLMsTxt

Build 1

SDKs, sample code, and the tooling you integrate with

GitHubOrganization
GitHubOrganization

Access & Security 1

Authentication, authorization, and security posture

DomainSecurity
DomainSecurity

Company 5

The organization behind the API

Website
Website
 About
About
 LinkedIn
LinkedIn
 Twitter
Twitter
 Investor
Investor

Other 2

Properties that don't map to a standard resource type

Product
Product
 Product
Product

Source (apis.yml)

apis.yml Raw ↑ 
aid: first-day-entertainment
name: First Day Entertainment
description: First Day Entertainment Inc. is a Sunnyvale, California game studio building AI-powered games, founded by Stephen
  Gou (formerly a founding engineer at Cohere) and Mike Mei, and funded by the a16z SPEEDRUN accelerator (batch 002) and MiraclePlus.
  The studio ships two titles - Heroes of Magic & Cards, a poker deckbuilding roguelike distributed on Steam, and Mana Land,
  a single-player RPG in which players adventure alongside conversational AI companions, published on itch.io. First Day Entertainment
  is a consumer games company; it publishes no public developer portal, API documentation, or machine-readable API artifacts
  as of this enrichment pass.
url: https://raw.githubusercontent.com/api-evangelist/first-day-entertainment/refs/heads/main/apis.yml
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://static.wixstatic.com/media/6e8a1f_7f740066ad764f6b97109ec0f6b68442~mv2.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- a16z
- MiraclePlus
x-tier: profiled
x-tier-reason: no-public-api-surface
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-20'
tags:
- Company
- Games
- Gaming
- Artificial Intelligence
- Entertainment
- Consumer
- Startup
apis: []
common:
- type: DomainSecurity
  url: security/first-day-entertainment-domain-security.yml
- type: Website
  url: https://www.firstdayentertainment.net/
- type: About
  url: https://www.firstdayentertainment.net/about
- type: GitHubOrganization
  url: https://github.com/First-Day-Entertainment
- type: LinkedIn
  url: https://www.linkedin.com/company/first-day-entertainment/
- type: Twitter
  url: https://x.com/FirstDayGG
- type: Investor
  url: https://speedrun.a16z.com/companies/first-day-entertainment
- type: Product
  url: https://store.steampowered.com/app/3843360/Heroes_of_Magic__Cards/
- type: Product
  url: https://firstdaygg.itch.io/mana-land
- type: LLMsTxt
  url: llms/first-day-entertainment-llms.txt
x-enrichment:
  date: '2026-07-20'
  status: minimal
  artifacts_added: 3
  pass: local-v1
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io