Fletch
BuildRegistry

Robinhood Chain · 4663

Build on Robinhood Chain. Fletch verifies it.

Describe the dapp. Fletch writes the contract and the page, compiles it, tests it, and hosts it. It is the source of truth for Robinhood Chain: live blocks, APIs, and verified contract addresses. Close the tab. Your app keeps running.

No VPS, no RPC keys.

Enter to send. Shift + Enter for a new line. Ctrl or Command + Enter also sends. Ctrl or Command + K to focus. Text files: 5 maximum, 64 KB each, 128 KB total. PNG/JPEG images: 3 maximum, 2 MB each, 4 MB total, 4096 pixels per side.

Opens your prompt in Build. Review it there, then click Ship to start.

BuildRegistryAPI & developer tools

For agents API instructions in Markdown

what fletch can do

Built for the Chain,not just the prompt.

01

On-Chain Truth Oracle

Fletch gives the builder recorded Robinhood Chain addresses, identity checks and market observations. The builder can request relevant data from the registry, with the source and freshness limits attached.

02

Persistence Beyond the Tab

Browser builders stop working the second you walk away. Fletch runs a background daemon that reads every block, handles reorgs, and delivers alerts wherever you want them - Telegram, webhooks, your own agent.

03

The Compiler is the Judge

Every line compiles before you see it. Fletch runs Foundry test suites inside an isolated sandbox and shows the compiler output and source verification.

04

Zero Infrastructure Overhead

You never set up an RPC, a VPS, or a deploy script. Fletch compiles, tests in Foundry, deploys to testnet, and hosts your dApp on a live subdomain.

Apps built by users

The latest apps their owners submitted to the public beta directory. New listings appear here after review. Arcade games get their own cabinet.

Browse all apps

Loading public apps…

see the output

Apps you build in secondsthat keep running.

Build a page or a tool from a prompt: token launchers, live trackers, and on-chain games.
Interactive dApp

Describe a testnet token launch page with a trading curve and wallet actions. Review the generated contract and test the trade flow before publishing.

Analytics

Build a dashboard from recorded token activity. Show the source and age of each reading, with missing data clearly marked.

Interactive dApp

Describe a game whose moves are signed transactions. Fletch builds the contract and interface on testnet so you can play through the rules before publishing.

pump-aapl.apps.fletch.now

Example UI · illustrative data

Example market price

$184.20

Bonding curve

74%

Example volume

$42,100 USDG

Amount500 USDG
Swap On-Chain
  1. ✓ Contract compiled in Foundry
  2. ✓ Sandbox deployed
  3. 0x7a2… bought 2,400 AAPL
ROBINHOOD CHAIN · 4663

Give your app chain data it can explain.

The builder starts with recorded chain configuration and addresses. It can query Fletch for token identities and indexed pools as the app needs them. The response shows the observed facts and their age.

Token identity

Listing and contract checks

Build reports

Inspect compiler and test output

Watch checkpoints

Recorded block and observation time

beyond pages

Complex DeFi logicand event automation.

Deploy custom yield vaults, real-time indexers, and background daemons that run 24/7 on Robinhood Chain.
DeFi protocol

Build a vault with deposits, shares and withdrawals on testnet. A demo strategy must label its test assets and calculate returns from funds the contract can pay.

Dev infra

Build a view of indexed contract events with their block numbers and decoding source. Show the covered range and any indexing delay.

Automation

Design an alert dashboard with conditions and delivery history. Fletch Watch already supports mainnet events with dashboard matches and optional Telegram or webhook delivery.

vault-aapl.apps.fletch.now

Example UI · illustrative data

Example TVL (USDG)

$1,240,500

Example APY

8.4%

Collateral ratio

150%

Example collateral reading

Amount1,000 USDG
Stake & Yield
  1. ✓ Oracle price feed synced
  2. ✓ Foundry strategy test passed
  3. 0x3f1… deposited 100 AAPL
always on

Alerts that keep working after you close the tab.

Choose a supported mainnet token or event in Watch. Matches appear in your dashboard, with optional Telegram or webhook delivery. Each alert includes the recorded event so you can check what triggered it.

Join the Fletch Telegram
live registry

Robinhood Chain datawith its source and age.

Fletch checks published token identities against Robinhood Chain and records the evidence. Pages, JSON and feeds expose the observed state with its source, age and coverage limits. The counters below use the registry's own tables.

206

verified listings

194

records with a canonical beacon

45

assets with a feed reading

stale

registry status, self-reported

Reading checked . The registry daemon last reported 8 d ago; every figure is as old as its last run. Source times and coverage.

Listed token identities

Robinhood's Stock Token list compared with bytecode and contract metadata. A ticker alone does not establish an issuer relationship.

Beacon dependency

Recorded beacon addresses show which implementation a Stock Token depends on. Listing and metadata checks establish the verified identity.

Multipliers and pauses

The current split multiplier, scheduled changes and pause states, with the time each contract was read.

Price feeds and history

Recorded Chainlink answers and available round history. A heartbeat check flags old readings.

Supply reconciliation

Indexed mint and burn events compared with contract supply. Coverage and unexplained differences stay visible.

Holder observations

Balances derived from indexed transfers, with pool and bridge labels where a match is known. Read the indexed range before treating a total as complete.

Markets and pool selection

Compare prices, measured depth and available trading activity. Selected pools and observation times explain each reading.

Bridge activity

Recorded deposits and withdrawals through the Arbitrum gateway, with escrow and supply observations.

Lookalike tokens

Discovered contracts that share a listed ticker or name. Compare their addresses and recorded identity checks.

Issuer documents

Tracked prospectuses and Final Terms, with source links and detected revisions.

Changelog and alerts

Recorded changes in the page, Atom, JSON and live stream. Watchers can deliver matching events to Telegram or a webhook.

Freshness and coverage

Job results, observation ages and indexing gaps show what is current and what still needs a reading.

Browse the live registryfor agents:JSON, listed assets and recorded stateChangelog as a live streamOpenAPIllms.txtMCP server, on GitHub
integrations

Use Fletch from your own tools.

Connect your model API key for builds or a webhook for alerts. Developers can read Registry data through the JSON API and MCP server, with OpenAPI and an agent skill to describe the interfaces.

LLM

Claude Code

Verified Stock Tokens, queried over MCP.

IDE

Cursor

soon

Fletch's CLI skill in your workspace.

Compiler

Foundry

Compilation and sandboxed test suites.

Comms

Telegram

Watcher alerts delivered to your linked chat.

Explorer

Chain explorer

Source verification attempts after deployment.

Network

Robinhood Chain

Mainnet data and testnet app deployment.

Protocol

Fletch MCP

Registry reads over MCP, from GitHub.

Data
{ }

JSON Endpoints

Token records with provenance and reading times.

Devs

Custom Webhooks

Signed watcher events with delivery retries.

Agent

llms.txt

A chain map for any LLM's context.

Payments
$

USDG

soon

Credit purchases signed from your wallet.

Alerts

Webhook Routers

soon

Alerts to Slack and Discord channels.

Pricing · coming soon

Pay for builds. Watch for free.

Start with 1 free build credit for each new address after wallet sign-in. Paid checkout is not open. The Builder subscription is planned at $19/month. A failed charged build refunds its Fletch credit.

BETA
01

Free

For a first app and a first alert

$0

wallet sign-in, no card

  • 1 free build credit for each new address after wallet sign-in
  • A failed compile refunds its credit
  • A saved preview, with hosting when you click Publish live app
  • 5 watchers for supported mainnet events
  • The public registry, every token page, and an API key
Start free
PLANNED
02

Builder

For shipping something every week

$19/mo

planned subscription; checkout is not open

  • 100 build credits a month, unused ones roll over
  • Use your own model API key (also available in beta)
  • Mainnet deployment with source verification attempts
  • Hosted apps at your own domain
  • Front of the sandbox queue
  • 25 watchers, with Telegram or webhook delivery
  • Build history exported as a repository

Planned. The current beta is available while subscriptions are being prepared.

Coming soon

FOR TEAMS
03

Desk

For a team that works on one chain

Coming soon

invoiced in USDG, priced on volume

  • A shared workspace with roles
  • Dedicated sandbox capacity
  • Watchers beyond the cap, Slack and email delivery
  • API keys with higher limits, machine-payable per call (x402)
  • A named contact
Talk to us
Wallet sign-in, no cardA failed compile refunds its platform creditThe source is yours to take anywhere
The full pricing page

Start here

Build your first app on testnet.

Sign in with a new wallet address to receive 1 free build credit. A failed compile refunds its platform credit. Watchers record matches in your dashboard; Telegram and webhooks are optional notifications. Use the platform model or connect your own model API key.

Open Build →Read docs

Wallet sign-in, no card, testnet 46630