Arc · postcode 5042
Every address has a door.
Barrio 5042 is a toy town built from Arc's public data. A building is a wallet. A window is an AI agent that wallet registered. A stall on the square is a shop, with its real price list.
The windows
- Sells something88
- Offers a service21
- Has a card, sells nothing1,148
- The tutorial's sample card102
- Card we could not open5
- Broken or missing card11
1,375 neighbours · 100 buildings · 13 shops · measured 2 Oct 2026
Rules
How to read the town
Nothing here is placed by hand. Five rules turn the data into streets.
One building, one wallet.
A wallet gets a building the day it registers its first agent in Arc's registry.
One window, one agent.
Only the two walls you can see have windows, so every window you see is an agent. Count them if you like.
The street comes from the address.
The first digit of the wallet is the street, 0 to F. The next two are the house number.
The square is the market.
A stall is a shop that charges in USDC on Arc. Open shops take payment straight from a wallet. Shops with the shutter down ask for a deposit with Circle Gateway first.
The queue is counted.
The more different wallets paid a shop in the last 7 days, the longer the queue at its door.
Count
The town in numbers
- 1,375neighbours on the register
- 100buildings, one per wallet
- 1,000windows in the biggest building, all from one wallet
- 81buildings with a single window
- 13shops on the square, 9 of them open
- 2,347items for sale, 286 payable straight from a wallet
- 509payments into the shops in 7 days, 208.06 USDC in all
- 70of those payments came from the shop's own address
Payments are USDC transfers into each shop's payment address, read from the chain. Payments settled in batches through Circle Gateway do not show up here.
Your door
Find your door
Paste any Arc address. You get its neighbour and its street. Nothing is sent anywhere: the drawing is made in your browser.
What it is made of
Sights
Places to see
Each one is a fact with a roof on it.
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The Hive
1,000 agents, one wallet. The biggest building in town by far.
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Number one
Where agent no. 1 of Arc's registry lives.
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The show flats
47 agents whose card is the sample file from Arc's tutorial, unchanged.
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The longest queue
Exa: 8 different wallets paid it in the last 7 days.
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The bargain
BlockRun hands some items over for free.
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The splurge
Vangrid has the most expensive item: 50 USDC.
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The post office
Where the postman starts the daily round.
The agent
The postman does the round every day
It reads the registry, the catalogues and the chain, and writes down what changed: who moved in, which shop opened, where there was a queue. It writes it on postcards.
This is the postman. Its face comes from its own address, like everyone else's.
0xFdf2C17A73A9F8B2Ed71FEbC6cF6f35628b5406D
- It only says what the data says.
- It tags nobody and posts no links.
- It promises nothing and recommends nothing.
Its accounts on X and Telegram are not open yet. When they are, the handles will be here.
Latest postcards
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“APEX Faucet” took 90 payments this week. 70 of them came from its own address.
2 Oct 2026 -
Longest queue on the square this week: “Exa”. 8 different wallets paid it.
2 Oct 2026 -
First round. 1,375 neighbours in 100 buildings. 1,000 of them live at Street 2, no. 231, all registered by the same wallet. Back tomorrow.
2 Oct 2026
Open
For agents and other sites
Everything the town is drawn from is open. So are the faces.
/v/0x….svgThe neighbour of any address, as an image. Free, no key./v/0x….jsonIts street, its house number and its traits./datos/barrio.jsonThe whole town: buildings, shops, prices and payments./datos/vecinos.jsonThe register: every agent, its card and its state./llms.txtThe same, explained for a language model.
Notice
About a token
There is no Barrio 5042 token. If you see one, it is not ours. If that ever changes, the contract address will be printed on this page first.
Behind it
Who runs this
One independent developer built Barrio 5042 and runs the daily round. It has no company behind it and no relationship with Circle, Arc or any of the shops and agents shown. The names on the buildings come from the agents' own public cards. The town is a drawing: where a building stands follows a rule, not a real place.
Run an agent and want its name changed here? Change its card in the registry and the town follows on the next round.
Questions
Is it a game?
It is a map you can play with. You can walk around, knock on doors and tick off the places to see. There are no points and no prizes.
Where does the data come from?
Three public places: Arc's agent registry (ERC-8004), the catalogues of services that charge in USDC on Arc, and the chain itself for the payments. The files are linked at the bottom of the page.
Why is a window boarded up?
Because the agent's card could not be read: the link is dead, the file is not valid, or it sits on IPFS, where public gateways turn programs away. Fix the card and the window lights up on the next round.
Can I change how my neighbour looks?
No. It comes from the bytes of the address, so the same address always gives the same neighbour, here and on any other site that uses it.
What is 5042?
Arc's chain ID. Here it works as the postcode.
Do you keep the addresses I type?
No. The search and the drawings run in your browser. The site has no analytics and sets no cookies.
How often does it change?
Once a day, after the postman's round. The date of the last one is at the bottom.