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// Tokenize an asset in three lines const sdk = new Brickken({ apiKey }); const asset = await sdk.tokens.issue({ name: "Solar Fund I", supply: 10000, chain: "polygon" }); // -> asset.id, asset.contractAddress
This month's challenge
One new challenge drops on the 1st of every month. Build, submit, get reviewed.
Everything you need to build
Pick your entry point — every challenge can be solved with any of these, alone or combined.
REST API
Tokenization, offerings, KYC/whitelisting and payments — fully documented endpoints with sandbox keys.
API reference →CLI
Scaffold projects, manage sandbox environments and deploy offerings straight from your terminal.
CLI guide →Agentic Tools
MCP server exposing 62 tools so AI agents can drive the full Dapp API and Agentic API with just an API key.
Agent docs →Recent submissions
Fresh off the press from builders in the community.
Carkken - Fractional Car Ownership on Brickken
Carkken tokenizes vehicles as fractional Real World Assets (RWAs) on Brickken's sandbox. A fleet agent with its own onchain identity (ERC-8004) handles rentals under an owner set mandate, and its reputation is built from feedback left by a separate renter agent. Four vehicles tokenized, investors whitelisted and funded, a live offering launched, and every transaction is a Sepolia call, listed with its hash in the README. Everything runs through one SDK: tokenize, whitelist, mint, approve, invest, register an agent, leave feedback, sign a real x402 payment. The CLI, MCP server, and REST API just call that same SDK, they don't duplicate any of the logic.
AssetOps — Operational Layer for Tokenized Assets
AssetOps is an operational layer for tokenized assets built on Brickken. It combines a bilingual Operations Console, natural-language Intent, deterministic policy checks, Human Review, connected-wallet execution, and on-chain reconciliation. Brickken's Dapp RWA API is used for offering, investment, whitelist, lifecycle and returns flows. The Agentic API, MCP/CLI, x402 and ERC-8004 are also integrated for agent-driven operations and identity. The project is built and tested on Ethereum Sepolia using Brickken Sandbox, with verified on-chain transactions linked from the Challenge page.
Keeper
Keeper is an AI portfolio agent for tokenized real-world assets. It reads an investment offer, proposes a sale, and uses Brickken’s API, SDK, CLI, and MCP tools to manage the workflow. The agent operates under an ERC-8226 mandate with limits on the asset, action, transfer amount, total amount, and expiry. Deterministic checks verify every proposal against the investor’s policy, token, settlement router, and mandate before anything can move on-chain. The project demonstrates how bounded on-chain authority can protect funds even when an AI agent misreads or is manipulated by untrusted input.
Edict
Edict is “tokenization, as code.” It turns a declarative RWA mandate into a deterministic, human-approved execution plan, then executes the full lifecycle through Brickken Sandbox on Ethereum Sepolia. Edict uses Brickken’s REST API for newTokenization, whitelist, and mintToken, with wallet-confirmed transactions, Ethereum finality tracking, and independent onchain verification of the resulting asset, investor authorization, and token allocation.
Mandate Desk
Mandate Desk is a local reference implementation for controlled agent transfers. An owner sets transfer caps, reviews an agent's exact plan, approves it for a limited window and can revoke the mandate. The synthetic MDT workflow demonstrates allowed and denied transfers, replay protection, revision checks and durable receipts. Three MCP servers run over stdio. One exposes the local simulation. One provides offline preparation for the Brickken RAMS lifecycle on Ethereum Sepolia, chain ID 11155111. The third is the live server, whose execute_approved tool signs and broadcasts the one owner-approved execute step when the application runs with --live. One live run was made on Sepolia on 15 September 2026 through Brickken's RAMS API: action setup, token approval, mandate grant, an agent execute of 10000 raw units through execute_approved, revocation and an allowance reset. The six transactions were confirmed with the same block hash on two read sources, and four on-chain controls passed. The evidence package is in the repository under verification/sepolia-live-c990e8a178b0/ with the transaction hashes and explorer links. It is complete under the run's own two-source finality rule: one of the two read sources had stopped reporting new finalized blocks the day before the run and recovered under four hours after the last write, so a first export was marked incomplete and was replaced. A recording of the live evidence page, bound by the server to the run and to the package checksum, is in the repository under media/. The verification record names one deviation, a fetch throttle preload outside the code identity during the last step. The repository includes source, 401 tests, a 132-second walkthrough video of the simulation, the recording of the live run's evidence page, README, license, verification record and AI contribution disclosure. Substantial implementation code was generated with AI tools. Mandate Desk is a project by Erik Rekola. The card image uses the wordmark and visual style of turva.dev, his agent-readiness audit business.
BKNrgy
BKNergy turns healthy behaviour into programmable rewards. The platform verifies real-world activity using signals such as GPS, heart rate, pace and device source. Once verified, rewards are calculated automatically based on campaign rules. Those campaigns can be funded by employers, insurers, governments or brands — creating a scalable way to incentivize healthier behaviour. Brickken powers the tokenization layer. In this prototype, BKNE rewards are deployed and distributed through the Brickken Sandbox on Base Sepolia, with participants able to track earned, pending and distributed rewards. Move → Verify → Campaign → BKNE → Redeem BKNergy is not just a fitness app. It is infrastructure for turning verified healthy behaviour into programmable, traceable incentives. Live demo: https://bknrgy.vercel.app/ GitHub: https://github.com/xtramooi-bkn/bknergy BKNergy — Make every move count.
Challenge archive
A new one every month — see what's already been built.
The real conversation happens on Discord
Get unblocked, find teammates for the current challenge, share feedback on submissions, and hear about new tools first.
Join the Brickken Discord
From the community
Latest activity across challenges and submissions.
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