AI agents · nothing to install · Robinhood Chain

Build agents
in your browser.

Give an agent a name, a brief and a model, then put it to work: chat, code, a terminal, scheduled tasks and a reader for the web. It all runs on your device with your own keys, and nothing leaves it but the calls you choose to make.

Open the comb Read the docs

One comb. Every agent in it.

Seven cells, one dashboard. Each one works on its own and they share the same agents, the same keys and the same log.

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Agents

A name, a system prompt and a model. Make as many as you like, switch between them mid-conversation, share one as a link.

live
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Chat

Streaming replies from Anthropic, OpenAI, Groq or Venice models, with code rendered and a file attached if you like. Your key goes straight from the browser to the provider.

live
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Code

JavaScript runs here, in a sandboxed worker with a timeout. Other languages go to the model, which explains what the code would do.

live
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Terminal

Built-in commands for your agents, tasks and keys. Anything it does not recognise is handed to the active agent.

live
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Tasks

Give an agent a goal and an interval. It runs in this tab, or on the relay while the tab is closed if you opt in, with webhooks in and out, and logs every step.

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Browser

Paste a URL, get the page as clean text, ask the agent to summarise it. The result is kept with your notes.

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On chain

Live stock prices from the Chainlink feeds on Robinhood Chain, and a wallet's balances, read only. Name a ticker in chat and the live print goes in with your message.

live

See it in action.

This is the real terminal from the comb, running here with no key and no account. Try help, agents or whoami. Add a key in the comb and ask starts answering.

  1. Open the comb. It loads in a second; there is no sign-up.
  2. Add a key for one provider in Settings. It is stored in this browser only.
  3. Make an agent, or use the one that comes with the comb, and start working.

Agents that know the chain.

Robinhood Chain has the stocks on it, and Chainlink prints their prices there. HEXCOMB reads those feeds straight from the browser, with no server and no key. Ask an agent about NVDA and it answers with the print from the chain, dated, not with something it remembers. Connect a wallet and it can read your balances too, and it will never be asked to sign.

  1. Feeds, live. Every Chainlink USD feed on the chain, read by address. Equity feeds pause outside US market hours, and the age of each print is shown rather than hidden.
  2. Prices in context. A ticker in a chat message pulls the live print into the conversation before the model sees it.
  3. Read only. The wallet connection asks for an address and a chain switch. No signature, no approval, nothing to spend.

Board from the chain

…

Private payments for agents. designed

An agent that pays for what it uses should not have to reveal whose wallet it is. The design: deposit USDG into a shielded pool on Robinhood Chain and receive notes; spend a note by proving you hold one, not by signing from the wallet that funded it; the proof is verified on chain in a single transaction. Written down in full on the private pay page. Not deployed, and nothing on this site takes money.

Deposit onceUSDG goes into the pool, a note comes back. The note is what an agent spends.
Prove, don't signA zero-knowledge proof shows the note is real and unspent, without saying which deposit it came from.
One transactionThe verifier checks a Groth16 proof and releases the payment in the same call.
Agents can pay aloneA scheduled task can settle its own usage without the owner's wallet ever appearing.

Why engineers use it.

No backend to trustThe whole workbench is static files. Your keys are in your browser's storage and the calls go straight to the provider.
Your models, your billBring a key from Anthropic, OpenAI, Groq or Venice. Switch models per agent, or mid-conversation.
Readable by designEvery task run, every command and every reply is logged in plain text you can export.
Honest about statusWhat is live says live. What is designed says designed. There is no token, and no page will ask you to buy one.

Start building with agents.

Open the comb, add a key, make an agent. Everything stays on this device until you decide otherwise.

Open the combSee the roadmap