Game-asset NFT marketplace and platform from Mythical Games, built on the Mythos Chain (a Polkadot parachain) with custodial player wallets. Powers in-game item economies for NFL Rivals, Blankos Block Party, and FIFA Rivals via Mythical's Platform SDK and Marketplace gRPC/REST APIs.
- 01game-asset NFT marketplaces
- 02custodial player wallets for web2-style UX
- 03Mythos Chain integrations
- 04in-game item primary + secondary sales
- 05fiat onramp + KYC for game players
- # Mythical's Platform SDK is partner-distributed (not on npm); request access via developers.mythical.com.
- # Server-side integrations call the Mythical gRPC / REST APIs directly.
| Variable | Scope | Description |
|---|---|---|
| MYTHICAL_CLIENT_ID | Server | OAuth client ID issued by Mythical for your game/title. Server-only. |
| MYTHICAL_CLIENT_SECRET | Server | OAuth client secret for the Mythical Platform API. Server-only. |
| MYTHICAL_TITLE_ID | Server | Title (game) ID under your Mythical org. Used in API paths. |
Mythical Marketplace runs on Mythos Chain with custodial player wallets — players sign in via Mythical OAuth and Mythical signs on-chain transactions on their behalf. Server flow: exchange `MYTHICAL_CLIENT_ID`/`MYTHICAL_CLIENT_SECRET` for a bearer token at `POST https://oauth.mythical.com/token`, then call the Marketplace API at `https://api.mythical.com/marketplace/v1/`: `GET /listings`, `POST /listings` (server signs as the title), `POST /listings/{id}/buy`, `GET /inventories/{playerId}`. NFTs are MYTH-standard tokens minted from per-title collections. Primary sales (mint + sell) and secondary (player-to-player resale) both flow through the same listing endpoints; royalty + platform fee are deducted server-side at settlement.
- ⚑Mythical wallets are custodial — the user never holds the private key; if your app needs self-custody UX, Mythical is not the right fit. KYC is performed by Mythical on the player.
- ⚑Royalty enforcement: title creator royalties are configured in the Mythical dashboard and applied server-side at marketplace settlement — they are guaranteed (custodial enforcement), unlike typical EVM royalty schemes.
- ⚑Marketplace fees are bundled into the title contract (typically 5% platform fee + creator royalty); confirm your title's fee schedule in the developer portal because fees vary by partnership.
- ⚑Chain coverage is Mythos Chain (Polkadot parachain) only — assets are not bridgeable to Ethereum/Solana out of the box, and there is no public Mythos JSON-RPC for arbitrary contract calls.
- ⚑API access is partner-gated and requires a signed agreement with Mythical Games; there is no self-serve developer onboarding for the marketplace API in 2026.
- ⚑Custodial deposit risk: in-game item economies depend on Mythical's solvency and operational uptime — if Mythical is offline, players cannot trade. Document this clearly in product UX.