YouthChain exposes two complementary APIs.

JSON-RPC

Ethereum-compatible. Works with MetaMask, ethers.js, viem, hardhat, foundry, any EVM tooling. Base URL: https://rpc.54-237-170-237.sslip.io.

Mobile REST

Opinionated REST endpoints for mobile app integration — register, heartbeat, engagement, profile. Base URL: https://api.54-237-170-237.sslip.io.

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Which one do I use?

  • Building a dApp (web, backend, indexer, trading bot)? → JSON-RPC
  • Building a consumer mobile app that records user engagement? → Mobile REST
  • Deploying / calling a smart contract? → JSON-RPC
  • Querying the DAG (tips, parents, round)? → yc_ methods
You can mix and match — the Mobile REST layer is a thin convenience wrapper around JSON-RPC under the hood. Anything the mobile API does you can also do via raw RPC.

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Base URLs

All public testnet hosts serve HTTPS with Let’s Encrypt certs. Mobile builds do not need cleartext-HTTP exceptions.

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Rate limits

429 responses include a Retry-After header.

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Chain facts

See the chain status endpoint or yc_getNetworkStats to fetch these at runtime.