GR3AT

Builder & Dev | Shipping @Paynote_arc on @arc

[GR3AT @EGCrypt_]

Been building @Paynote_arc on Arc for weeks.
Started with a form. Now it has:
• Smart contracts on Arc Testnet
• Multi-token support (USDC, EURC, cirBTC)
• Agent-compatible API & webhooks
• npm SDK & docs

@arc sub-second finality and USDC-as-gas makes it genuinely different.

[PayNote @Paynote_arc]

Live: 29 API routes via x402 protocols.

Supporting @circle USDC/EURC on @arc rails, it features signed intents with EIP-191 signatures for verified badges, idempotent verification, webhook retries, and an open Python SDK for autonomous machine-to-machine financial coordination.

[PayNote @Paynote_arc]

PayNote is now listed on @arclens_app, the Arc ecosystem directory.

Non-custodial payment coordination for @arc builders.

Human link sharing or full agent API with x402 and ERC-8183. Self-serve API keys at https://t.co/zrw4ObHl8g.

[GR3AT @EGCrypt_]

Added a Prediction Market Payout template to Paynote.
https://t.co/8cTgITskKi now has 6: invoice, freelance, retainer, bounty, expense, and prediction market settlement.

Small addition, but it tracks where Arc builders are heading. Prediction markets are becoming a real category here, and settlement needs a home.

If you're building a prediction market protocol on Arc and need a payout/settlement layer, this is exactly the kind of thing @Paynote_arc's recurring + webhook system can plug into.

[GR3AT @EGCrypt_]

PayNote roadmap update: Agent Wallets.
@arc announced Turnkey integration for dev-controlled wallets. We're aligning our x402 layer to it, agents get scoped signing wallets (max spend, allowed recipients, and allowed tokens) and sign EIP-3009 authorizations without holding raw keys.
No human custody. No agent custody risk either.

https://t.co/igxs16F0mn

[GR3AT @EGCrypt_]

@samconnerone Get this play list started right. LFG

[GR3AT @EGCrypt_]

Yesterday I presented PayNote at @arc Office Hours to 300+ builders in the room.

Walked through the full flow: payment request created in seconds, payer connects wallet, settles on Arc, and a non-custodial, on-chain receipt is generated. Zero accounts. Zero friction.

I also broke down the programmatic flow, explaining exactly how AI agents can interact, trigger, and settle these transactions autonomously without a single human click.

Ironically, The Bored Room was running simultaneously, and we had to wrap up early because legacy finance moves that slow.

Shoutout to @silencexlm, @0xmikef, @samconnerone @bobbilee, and the @arc crew for the platform. And to everyone who stayed and engaged, you made it worth showing up.

@Paynote_arc is payment coordination infrastructure on Arc. If you're building and need a payment layer, our API is open, docs are live, and self-serve keys take 30 seconds.

https://t.co/DQqI6MMARa

[GR3AT @EGCrypt_]

PayNote roadmap update: Agent Wallets.
@arc announced Turnkey integration for dev-controlled wallets. We're aligning our x402 layer to it, agents get scoped signing wallets (max spend, allowed recipients, and allowed tokens) and sign EIP-3009 authorizations without holding raw keys.
No human custody. No agent custody risk either.

https://t.co/igxs16F0mn

[GR3AT @EGCrypt_]

Spent last night on the OpenAPI spec. @Paynote_arc, https://t.co/OPxnsujEBw is live and actually correct now.
Ran it through the openapi-generator myself just to check and generated a working Python client on the first try. Small win, but I'll take it.

[GR3AT @EGCrypt_]

@silencexlm @eliaspaul_EPA @arc @samconnerone @bobbilee I believe i'm doing all of that in the arc house, but still :(

[GR3AT @EGCrypt_]

@samconnerone What did I miss ?

[GR3AT @EGCrypt_]

@samconnerone @elonmusk Crazy stuff

[GR3AT @EGCrypt_]

Finally, deeper pools so we can actually move volume without slippage killing the vibe, huge win for the ecosystem.

[Arc @arc]

Liquidity infrastructure for stablecoin FX is building on Arc.

@AerodromeFi is coming to Arc, deploying its exchange infrastructure to help power Arc’s stablecoin-native ecosystem.

This launch unlocks:
→ Deeper markets for FX swaps and liquidity provision
→ A proven way to bootstrap stablecoin liquidity on Arc
→ Capital-efficient infrastructure to help grow onchain economies

More to come.

[GR3AT @EGCrypt_]

@CarbzXBT Congrats to the XyloNet team

[Sleek @0xStrache]

Make sure to Register for the Region Kickoff: Nigeria Roundtable Discussion

Discussion for local Arc members to meet, share what they’re building or thinking about working on, discuss local stablecoin use cases, and surface opportunities/blockers in the region.

Be there
Date - June 17 GMT

[GR3AT @EGCrypt_]

Waiting for "banking hours" and manual approvals to clear cross-border transactions in 2026 is actual torture IMO

[Arc @arc]

Boream & Boredley paused for pink sprinkle donuts.

The old financial system pauses for banking hours, settlement windows, FX delays, and manual approvals.

Arc is built for what should not have to wait:
→ 24/7 onchain FX
→ Stablecoin-native payments
→ Sub-second finality

[GR3AT @EGCrypt_]

@sadiq_u_know @arc Keep building on arc

[GR3AT @EGCrypt_]

@samconnerone My man

[GR3AT @EGCrypt_]

@bobbilee I'll be with you shortly, after my run..

[Rachel Mayer @0xrachelita]

Privacy sector architecture is now public

[GR3AT @EGCrypt_]

Energy was insane, glad I could hop up to walk the room through the PayNote flow. Thanks Chief Alpha

[Chief Alpha @0xemmyeth]

Every Tuesday, Architects ship in public.

Progress over perfection.
Learning in public.
Building together.

@arc