The federated transaction layer · mega apps are here

Every dapp.
One chat.

Fuse Uniswap, Snapshot, Robinhood — or your own MCP — into one agent that answers, votes, and builds safe, signed, receipted transactions. Compose it in minutes. Embed it in five lines.

Try it liveGet started

⇄ swap built on Uniswap · signed by your wallet · receipted

THE FUNDING LAYER

“Insufficient funds” isn’t an answer. It’s a to-do list.

Your users show up with money on the wrong chain — that’s not an edge case, that’s onboarding. Ask for $2 of AAPL with an empty Robinhood Chain wallet and the agent scans every chain, sizes the move with gas included, bridges, waits for settlement, and finishes the buy. Their wallet signs every step; nothing moves without them.

  • Scans, then offers Reads ETH + USDC across Base, Arbitrum and Ethereum — and answers with choices, not a lecture.
  • Gas rides along A wallet that can’t pay for the follow-up gets a gas leg first. Funds never land where they’d strand.
  • One job, your signatures Bridge → settle → act, compiled as one job. Each step is rebuilt and guard-checked when it’s your turn to sign.
  • Any MCP, same net Works for stakes, deposits, supplies, swaps — and the MCPs your users bring. Honest numbers when the wallet truly can’t cover it.
Try “Buy $2 of AAPL” →How one sentence becomes four transactions
COMPOSE YOUR SET

Pick two or three MCPs. Get one agent.

Combine our free first-party MCPs, anything in the directory, or bring your own. The combo is the point — each set unlocks turns no single dapp can do.

Uniswap+Snapshot

Trade + govern

“Swap 1 USDC to WETH, then vote FOR the treasury proposal.”

One conversation quotes the swap, builds the tx, and signs the EIP-712 vote — two dapps, one turn.

CoW Protocol+CoW docs

Trade + explain

“Quote 100 USDC → WETH — and how does MEV protection work here?”

Live quotes next to answers pulled from the protocol’s own docs. Ship your docs with your MCP and the agent answers from the latest push.

Hyperliquid+Uniswap

Positions + trade

“How’s my ETH perp doing — and swap 500 USDC to ETH on Base.”

Positions and funding from one MCP, a built-to-sign swap from another — read-only is $0, you sign the rest.

your MCP

Bring your own

Any MCP that speaks tools can join a set. We grade routability — schemas, params, docs — and tell you exactly what to fix so agents can actually drive it.

Add your MCP →
Sharp routing · the engine inside your set

Two MCPs in.
One agent out.

Inside every set, the sharp router reads the ask, picks the exact tool across your MCPs, and fills the params — Uniswap for the swap, Snapshot for the vote — then hands anything that moves money to the transaction builder. Over-cap asks get dropped, not built.

Open the chatPick your MCPs
THE TRANSACTION LAYER

From “swap this” to a signed, receipted transaction.

An agent that moves money should show its work — and learn from it. Every step receipted on every site it’s embedded in; every miss studied, so your set gets sharper the more people use it.

  1. 01Quote Live from the venue — CoW by default, Uniswap when you say so.
  2. 02Build Exact calldata or EIP-712, deterministic. Never freehand.
  3. 03Guardrails Re-fired per step. Over-cap gets dropped, not built.
  4. 04Sign Your wallet pops. We never hold keys.
  5. 05Receipt Tx hash on every settlement, in a public ledger.
  6. 06Learn Every dead-end conversation becomes an upgrade suggestion for your MCPs.
EMBED ANYWHERE

Embed the whole agent on your site. Five lines.

yeetful/embed mounts the full chat — receipts, guardrails, signing — as a bubble or inline. With wallet: ‘auto’, it uses the wallet already connected to the host page: signatures pop in the user’s own wallet, and we never hold keys.

npm i yeetfulv0.9
import { mountYeetfulChat } from 'yeetful/embed'

mountYeetfulChat({
  mode: 'bubble',
  mcps: ['uniswap-free', 'snapshot-free'],
  wallet: 'auto', // the host page's wallet signs
})
Read the embed docs →
Uniswap interface + Yeetful chatuniswap-embed.yeetful.com ↗

A fork of the open-source Uniswap interface with the chat mounted in ~25 lines. It auto-connects the page’s wallet, answers with your address, and quotes WETH→USDC through the free MCP.

LIVE DEMO
CoW Swap + Yeetful chatcow-embed.yeetful.com ↗

A fork of the open-source CoW Swap interface. The widget streams the connected wallet into the chat; quotes and MEV-docs answers run through the CoW MCP.

LIVE DEMO
your-app.com

Both demos are proof-of-concept forks of open-source interfaces, built to show the install. They are test cases only — not partnerships, and not affiliated with or endorsed by Uniswap Labs or CoW DAO. Logos identify the forked interfaces.

On the roadmap: the same agent in Discord · Telegram · X

THE TRUST LAYER

Why hosts embed it. Why users sign.

Guardrails, per step

Spend policy and budgets re-checked before every call and every transaction step. Denials get ledgered too.

Your policy →

Receipts, in the open

Every settled call carries a tx hash and lands in a public activity feed. No dashboards to trust.

Live activity →

Kill switch + org caps

Pause an agent or freeze an account server-side, instantly and reversibly. Orgs get a daily cap above per-key budgets.

How teams work →

Reputation, earned

MCPs score on reliability, liveness, speed, and settled history — so your set is built on proven routes.

Leaderboard →
THE WORKING SET

Start from MCPs that already work.

Browse the full directory →

Our free first-party fleet — swaps, governance, MEV-protected orders, live positions — is non-gated, rate-limited, and proven in the live chat. Select a couple, ask for a swap or a vote, then bring your own MCP alongside.

Uniswap (Free)

Trading

Uniswap v3 + v4 on Base, free and non-gated: live quotes across every fee tier (QuoterV2), spot prices, pool state, and deterministic swap-transaction building the user signs. Builds only — never holds keys, never submits. Rate-limited. By Yeetful.

FREE
DetailsTry in chat

Snapshot DAO (Free)

Data

Snapshot DAO governance, free and non-gated: browse spaces, proposals, and votes, then build the EIP-712 vote the user signs with their own wallet and relay it to the sequencer. The server never signs, never holds keys. Rate-limited. By Yeetful.

FREE
DetailsTry in chat

CoW Protocol (Free)

Trading

CoW Protocol, free and non-gated: live order-book quotes, MEV-protected swap + limit orders built into the exact EIP-712 order the user signs, open orders, trade history, portfolio, solver competition, and the official CoW docs (bundled, searchable). Builds only — never holds keys, never submits unsigned. Rate-limited. By Yeetful.

FREE
DetailsTry in chat

Hyperliquid (Free)

Trading

Hyperliquid, free and non-gated: live perp + spot markets, prices, orderbooks, candles, funding, and the full per-address account surface — positions, PnL, open orders, fills — plus a real-time settlement watch. Read-only by construction. Rate-limited. By Yeetful.

FREE
DetailsTry in chat

OpenSea NFTs (Free)

NFTs

OpenSea NFTs, free and non-gated: wallet NFT portfolios with images across Ethereum/Base/Arbitrum, collection floor prices and stats, live listings and best offers, plus construction-only NFT transactions — ERC-721/1155 transfers, Seaport sell listings the user signs gasless, cancels, and guarded buys. Ownership verified on-chain before any build; never holds keys, never signs. Rate-limited. By Yeetful.

FREE
DetailsTry in chat
Y

Yeetful Wallet

Wallets

Multichain wallet reads — an internal Yeetful tool: USD-priced whole-wallet portfolios across 9 top EVM chains (rendered as a rich card in chat), gas balances, precise token balances, recent transfers with scam-symbol flagging, and transaction confirmation status. The fresh-data layer after any swap or transfer settles. Read-only by construction. Rate-limited. By Yeetful.

FREE
DetailsTry in chat

Your MCP

BRING YOUR OWN

Paste a URL — we discover the tools, grade routability, and your MCP joins the set right next to ours.

Add your MCP →

Stay up to date

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