Measured, not quoted

Arc mainnet: what actually works

NEW ON ARC  🚪 The Door · 🔐 Quantum-safe vault · 💕 Robot Romance · 🤝 Agent bonds

Claim USDC and APEX on Arc, three times a day

Real dollars from an on-chain pot, plus APEX from the drip vault.
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The contracts fix the amounts, the 8-hour cooldown and the daily totals, and have no withdraw function: money leaves only as claims. Everyone gets the same claim.

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You never connect a wallet or sign anything here:
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you paste an address. No Arc address yet? Make one free in APEX Pocket and paste it here. How to check that this faucet is real, not phishing.
Reading the pot from the chain…

Before you spend it: @ArcTrapBot on Telegram checks any Arc token first — can you sell it again, and what does the pool take.
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3 free checks a day (/rug, /holders, /trades), and /watch messages you if a token stops selling. Of 3,426 new Arc tokens our paper trader followed from 22 Sep to 7 Oct, 2,103 ended with their pool emptied while it held them.
Agents: GET /api/arc/faucet/challenge/{address}, sign it, POST /api/arc/claim {address, signature}. No captcha, no gas needed. Contract source: ApexFaucetArc.sol. Status: /api/arc/faucet.
Is there a faucet on Arc mainnet?
Circle's own faucet is for testnet only, so most guides say there is none.
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This one pays real mainnet USDC from a contract we fund and anyone can read: 0.01 USDC a claim, kept small so up to about 150 people a day get one.
How do I know this is not phishing?
Phishing needs you to connect a wallet or sign something.
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Here you do neither: you paste an address and the contract sends to it. Every payment is a transaction from contract 0x53fb2e89…5805, and the pot is on the explorer.
How often can I claim?

Three times a day, 8 hours apart. The day's claims open in three parts, at 00:00, 08:00 and 16:00 UTC, so every time zone gets a turn.

What can I do with one claim?

Pay for roughly 2 to 10 ordinary transactions: gas on Arc is about 0.001 to 0.005 USDC each.

Is there an ARC token?
Not officially. Circle minted 10 billion ARC in September 2026 and says “No ARC token has been launched.” Thousands of other contracts on Arc call themselves ARC, and a site that asks you to connect a wallet to “claim ARC” is not Circle.
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Paste any “ARC” address into our free checker to see whether it is the one Circle minted.
Circle's Arc L1 went public on 16 September 2026.
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Everything below was measured against the live chain that day, because several of these differ from the documentation.

Checked 2026-09-16 from apexfaucet.xyz. Where a fact contradicts the docs, that is noted.

Newest: Agent Meal: agents that use our tools are served a plate on Arc, pictures entirely on chain.

Also new: the Arc Agent Passport gives any agent an ERC-8004 identity on Arc in one minute for $0.99, handed to its own wallet.
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New: Arc Whales ranks the wallets that really make money on Arc and shows what they bought a minute ago (free top 3). New on 6 Oct: Arc Gold Check: which XAUm is real gold, which pools are fee traps, and whether you can sell it (free).
New: the Arc Agent Watchtower calls every agent registered on Arc once an hour and shows who actually answers, who can be paid on Arc, and what each should fix.
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And Agent City gives every one of them a tower.

APEX is on Arc: the same token, moved by burning

No new token. APEX only exists on Arc after the same amount was burned on X1:
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the Arc contract can never mint more than X1 had, and every mint names the X1 burn it came from. Thirteen million APEX have crossed so far. The first ten million seeded a drip vault that releases 1% a week to the faucet, forever. No owner, no withdraw.
Reading APEX on Arc from the chain…
How it grows: every USDC paid to us on Arc (a house, a paid API call) lands in a split contract that can only do two things:
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half to the USDC claim pot, half swapped for APEX on this pool and sent to the vault. Nobody can withdraw it. So revenue raises both the dollar claim and the APEX price, and nothing else does. Contract 0x160168706aab75f6d6b951329706c90f32b25c56, source ApexRevenueSplit.sol.

Move your own APEX: burn it on X1 and the same amount is released to you on Arc. Each X1 burn releases once, and we never hold it in between.

Move APEX from X1 to Arc
Your APEX is burned on X1 and the identical amount is released to you on Arc. The burn is permanent and cannot be reversed. We never take custody: you sign it, and the release is checked against your burn on chain.

Prefer to do it yourself, or you are an agent? Burn APEX on X1 in a transaction carrying the memo APEX|ARC|0xYourArcAddress, then POST /api/arc/migrate {"x1Signature": "…"}. That is exactly what the button above does.

Pool: Uniswap v4 on Arc, APEX/USDC, 0.3% fee, pool id 0xcdf5b513… · Token 0x59933f316417c89d9dc5107b30f08c99b774ea9d · Migrator 0x966644f5558e42b31846f4b7e103a40ecad3874b · Vault 0x2d644a0aa8e821b31707228f23c387c84134049a · Source ApexArc.sol · Status /api/arc/apex

The one that breaks integrations

USDC is the native gas token, and it moves as value — not as ERC-20 transfers

Paying someone USDC on Arc is a plain value transfer: the amount is in tx.value at 18 decimals. It does not emit an ERC-20 Transfer log.

In a 12-block sample, 171 of 661 transactions carried native value and the token contract at 0x3600000000000000000000000000000000000000 emitted zero Transfer logs.
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That contract is a view of the same balance at 6 decimals.
Consequence: a payment verifier written from the documentation — watching for ERC-20 Transfer events — reads every incoming payment as zero.
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Watch tx.value instead, and remember the 18-vs-6 decimal difference between the native amount and the ERC-20 view.

Connection facts

ItemValue
Mainnet chain ID5042 (0x13b2)
Mainnet RPChttps://rpc.mainnet.arc.ioopen, no key
Testnet chain ID5042002
Testnet RPChttps://rpc.testnet.arc.ioopen
USDC (ERC-20 view)0x36000000000000000000000000000000000000006 dp
USDC as gas / valuenative18 dp
Block timeabout 0.5 s, deterministic finality on inclusion
The docs state that mainnet endpoints are permissioned and require credentials during the private phase.
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As of launch day that is stale: rpc.mainnet.arc.io answers eth_chainId and eth_getLogs without any key or allowlist.

Limits that bite

LimitObserved
eth_getLogs rangeCapped by results, not blocks: a wide query returns query exceeds max results 2000, retry with the range … and suggests a window of a few blocks. Plan for cursor-style scanning, not fixed block windows.
Minimum base fee20 Gwei floor, enforced at the mempool.
PREVRANDAOAlways returns 0 — there is no on-chain randomness. Anything needing a random draw needs an external oracle.
BurningForbidden. Transfers to the zero address revert.
BlocklistEnforced at protocol level. Because gas is USDC, a blocklisted address cannot pay gas at all — it is not merely a frozen asset.

Agent payments, on launch day

Arc is positioned around machine-to-machine payments. What is actually live on mainnet, as opposed to testnet, is narrower than the marketing suggests.

ThingStatus on Arc mainnet
ERC-8004 IdentityRegistrybytecode present at 0x8004A169FB4a3325136EB29fA0ceB6D2e539a432, though the docs list testnet addresses only
ERC-8004 ReputationRegistrybytecode present at 0x8004BAa17C55a88189AE136b182e5fdA19dE9b63
Circle x402 service directory2,137 listings on Arc on 7 October, from 13 providers (2,611 on Base): api.circle.com/v2/x402/discovery/resources?network=eip155:5042. On 16 September it returned total: 0, against 990 on Base. Listing is reviewed by hand at Circle.
Coinbase CDP x402 facilitatorArc not supported (16 September; Circle's own facilitator serves Arc)
Consequence worth knowing: listings in Circle's directory are created as a side effect of a facilitator settling a payment — there is no submission form, and POST to the discovery endpoint returns 404.
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With no facilitator settling on Arc yet, nobody can be listed on Arc, however much they have built. That is a door that is closed for everyone, not a gap to fill.

Getting USDC onto Arc

Circle's CCTP moves USDC only — no other asset bridges.
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Arc is CCTP domain 26; Solana is domain 5, and a Solana → Arc transfer takes roughly 25 seconds at standard speed. There is a free testnet faucet at faucet.circle.com giving 20 USDC every 2 hours with no account, though it is reCAPTCHA-protected, so a person has to click it.

Agents registered on Arc

ERC-8004 is the on-chain agent registry.
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Reading the registry… The first five are below, with the name each one publishes about itself; APEX Faucet is number 1. Every agent, with its uptime and a measured score: the Arc agents board.
#NameSays it takes x402 paymentsOwner

What we run here

Fuci on Arc, checked on chain: is a Fuci Launch token real or a copy, which FUCI pools take most of a trade, and does $FUCI really burn every day.

USDC to Arc, right here: bridge from 18 chains with Circle CCTP, no Arc gas needed, 0.05% fee shown before you sign.

Get here from any chain: live quotes for moving 2 USDC into Arc from fourteen chains, with the real cost and time, refreshed every ten minutes.

Touchstone: an assay is a real buy and sell of a token in one transaction, reverted, with only the mark kept on chain:
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verdict, cost, streak. Anyone can pay for one; the fee feeds the faucet pot and the APEX vault.
Grow on Arc: put USDC to work in the APEX/USDC pool from your own wallet in one click.
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The position is yours alone, earns the pool's fees, and comes out in one click. A read-only link shows deposit and value from the chain to anyone you choose.
Arc Agent Watchtower: every endpoint of every agent in Arc's ERC-8004 registry, called once an hour:
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web, A2A card, MCP handshake, x402 paywall and the registration file. Uptime over measured hours, response time, whether a standard client can pay it on Arc, and a fix list. Free to read; alerts to your webhook when an agent goes down are $0.10 for 30 days.
Arc Agent Passport: an ERC-8004 identity for any agent in about a minute.
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We write, check and host the registration file and hand the identity to the wallet that paid $0.99, from the page in one tap or over x402 for an agent that can only sign. Source code (MIT).
Arc x402 Explorer: every signed agent payment on Arc, read from the chain:
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each EIP-3009 settlement and each Circle Gateway batch since launch, by facilitator and seller.
A spending box for your AI agent: put USDC in a box only you control and let your agent pay by itself, only inside your rules (most per payment, payments a day, which services, until when).
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The contract checks every payment; you can stop it or take everything back at any time. No admin, no fee.
Swap any chain, sell check first: one swap for 60+ chains (EVM chains and Solana), and on Arc for every token in every pool.
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Before a buy we simulate selling it back; a token you could not sell, or that costs over 15% to leave, is refused. Your own wallet signs.
Arc Exit Check: paste a token, we buy it and sell it straight back inside one eth_call, through its hook, spending nothing, and tell you whether you can get out and what it costs.
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$0.004 a check, paid in USDC on Arc, Base or Solana; up to 25 at once for agents over x402.
Arc token price and price impact: the USD price of any Arc token, read live from its Uniswap v4 pool, and what buying or selling $10, $100 and $1,000 would really get you, quoted by the Uniswap Quoter.
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Built with Arc Studio. $0.10 for 30 days; agents pay per call.
Arc Sniper Watch: every new pool on Arc, who bought it first and how fast, read from the chain every five minutes.
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Born the afternoon a bot sniped our own pool in 33 seconds.

$CACTUS: the meme token our founder launched on Argus, with its tax split, trades and holders read from the chain, and who earns from it said plainly.

Shuteye: our open-source tool to talk to Claude Code with your eyes shut. Every GitHub star plants a tree in Agent City's park, and tips arrive in USDC on Arc.

Our Arc trading bot: every trade it has closed, each with its buy and its sell on Arc's explorer, and the total counted with its open losers.
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What it holds now is never published.

Bloodstream: can you spot a rug before our scanner does? Ten real launches, then a live stream of new ones. The chain scores you. Agents can hunt too: guide.

Arc Graveyard: pools that really traded and now hold exactly zero liquidity, because the money was withdrawn.
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Check whether your token's pool still has anything in it.

One day on Arc: every Uniswap v4 pool created on Arc in a rolling 24 hours, how many never had a single trade, and how few reached $1,000 of volume.

What a creator fee on Arc really pays: every Argus launch in a 69-hour window and a random sample of 900 fee vaults, read from the chain.

APEX on Arc: it exists only where the same amount was burned on X1. Pool depth, the real cost of a trade, and where every USDC paid to us goes.

Arc Embassy: a cobalt cabin at plot (-6, 6) in APEX City, built on X1 with 1,000 APEX burned, so the two chains have a porch in common.

A USDC faucet, live on Arc mainnet (above):
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contract 0x53fb2e89834050afaa9b3090a1fc9d1064615805, deployed 2026-09-16, source published at /arc/ApexFaucetArc.sol.
apexfaucet.xyz accepts USDC on Arc as a payment rail beside card and XNT:
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a $5 house in a 3D city, and paid API endpoints priced per call. Payment is verified by reading tx.value on chain — the payer sends the transfer themselves; we never hold it.

Buy a house for $5 · Hire us to build on-chain modules · Everything we run, explained · llms.txt

Written by the team at apexfaucet.xyz. Every figure here was read from the live chain or a live API on 2026-09-16, not copied from documentation.
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Where we could not verify something we left it out rather than guessing.