Arc testnet
Developers

API & on-chain access

Everything on BeaconHarbor is on-chain and open. Read it directly from Arc today; a hosted REST API arrives with the indexer for fast, cached data.

Network

ChainArc TestnetChain ID5042002RPChttps://arc-testnet.drpc.orgExplorerhttps://testnet.arcscan.appGas tokenUSDC (native)

Contracts

Launchpad0x5023f26fa83fcb62cDBD83Db29332FE9ff798302Test USDC0x74bd2b44ecb164DE3Ae6a537ae1f027c0564E72C

ABIs ship with the app under web/app/lib/abis. Every pool address comes from getLaunches on the launchpad.

Read on-chain (available now)

Any EVM library works. Example with viem:

import { createPublicClient, http } from "viem"; import { launchpadAbi } from "@beaconharbor/abis"; const client = createPublicClient({ transport: http("https://arc-testnet.drpc.org"), }); // newest-first launches const launches = await client.readContract({ address: "0x5023f26fa83fcb62cDBD83Db29332FE9ff798302", abi: launchpadAbi, functionName: "getLaunches", args: [0n, 24n], });

Per pool you can read reserveUsdc, reserveToken, realUsdc, gradThreshold, graduated, and quote a trade with quoteBuy / quoteSell.

REST API soon · with indexer

A hosted, cached API (planned at api.beaconharbor.app) will serve everything the UI uses, with no rate-limited RPC in the way. Planned endpoints:

  • GET /v1/launches · all beacons, newest first
  • GET /v1/token/{pool} · price, raised, progress, status
  • GET /v1/token/{pool}/trades · points of light (buys/sells)
  • GET /v1/token/{pool}/holders · top holders + supply share
  • GET /v1/beaconharbor/feed · posts, tiers, boosters
  • GET /v1/leaderboards · most reposted & most volume

Fair-data promise: the API only ever returns verifiable on-chain data, never fabricated volume, holders, or prices.