See what a B20
really is.
The canonical toolkit for Base's native token standard — explorer, SDK, launchpad, agents. Evidence over hype.
Deploy a B20 in ~12 lines.
One open SDK — byte-exact encoders, zero-RPC address derivation, typed error decoding.
import { encodeAssetCreateParams,
buildCreateB20Tx, B20Variant } from "@b20labs/sdk";
const params = encodeAssetCreateParams(
"My Token", "MYT", account, 18);
const tx = buildCreateB20Tx({
variant: B20Variant.ASSET, salt, params });
await walletClient.sendTransaction(tx);Seven products. One core.
Everything runs on one open SDK — build a policy decoder once, power every surface.
Explorer
The only B20-native block explorer. Generic explorers flatten a B20 into a plain ERC-20 — we decode what it really is: policies, pauses, admin power, seizability.
- ▸Every token indexed from block one of activation — 🔥 Trend (24h) & ⚡ Hot (1h) rankings
- ▸Safety pre-checks: policy-gated · paused · admin-held · supply cap — provable on-chain reads
- ▸Top holders + concentration, live transfers with Memo decoding, deployer rug-farm warnings
- ▸Embedded DexScreener charts with live USD price, volume & liquidity
B20 Kit — SDK
The canonical open TypeScript SDK for B20 — encoders proven byte-for-byte against base-std by a golden-vector differential test that runs in CI.
- ▸Byte-exact createB20 encoding + zero-RPC deterministic address derivation
- ▸decodeB20Error — all 48 precompile errors typed, incl. the failing-initCall index
- ▸On-chain activation gates: the only correct write-gate
- ▸viem-native · tree-shakeable · zero runtime deps
Launchpad
The no-code front door that won't let you deploy a token you don't understand — mandatory simulation before every signature.
- ▸Pre-sign simulation against the real precompiles, decoded errors, plain-English Deploy Plan
- ▸Quick Token & RWA/Stablecoin presets · Uniswap v4 fair-launch module
- ▸Cobalt-ready: sponsored first mint, pay gas in your own B20
b20-operator
A vendor-neutral MCP server — Claude, ChatGPT or Cursor inspect and simulate B20 tokens in natural language, with guardrails that survive prompt injection.
- ▸Read + simulate first; writes gated behind on-chain activation
- ▸Exact failing-initCall surfacing — 'your 3rd initCall is invalid', not 'it reverted'
- ▸Cobalt-ready: EIP-8130 smart-account agent wallets
Studio
A testnet lab where every B20 capability fires live — and the revert is the lesson.
- ▸Mint without MINT_ROLE → watch it revert · blocklist → PolicyForbids
- ▸Freeze-and-seize, granular pause, rebase — decoded results on every action
B20 Card
A shareable, read-only safety card that drops into a Farcaster cast or the Base App — instant 'can this token hurt me?' in the feed.
- ▸Paste an address → inline safety read, no wallet, no app switch
- ▸One codebase, two registrations: Farcaster manifest + Base.dev
Payments
ETH-less B20 payments, built on exactly what Cobalt unlocks.
- ▸x402 checkout with the B20 memo as a self-reconciling order ledger
- ▸Virtual-address deposit routing · pay gas in B20 — no ETH anywhere in the flow
Built Cobalt-ready, from day one
Cobalt is Base's next hard fork — the upgrade that turns B20 from a token standard into full financial infrastructure. Every B20 Labs product ships with an adapter seam, so activation day is a config flip, not a rewrite.
No ETH required — the sequencer accepts B20 as gas. Our SDK & Launchpad are designed for ETH-less flows.
EIP-8130 protocol-level smart accounts: sponsorship & batching without bundlers. Agent wallets, ready.
Balances & history straight from the node. Our explorer flips via an adapter — and keeps the pre-Cobalt history no node can serve.
Per-invoice deposit addresses forwarding to a treasury — the backbone of our Payments product.
soft-targeted ~Sep 2026 · we track the devnet branches so you don't have to
Evidence over hype
B20 didn't activate at 18:00 UTC on July 8. It activated at 21:56:17 UTC, block 48,379,215, in two stages — stablecoins first, assets 30 seconds later. We know because we measured it on-chain. Competitors' genesis blocks are hours or days off.
99%+ of B20 tokens are one admin transaction away from a honeypot. Our safety checks are verifiable on-chain reads — verdicts where we can prove them, indeterminate where we can't.