RWA · Carbon / ESG · BCT
Toucan Protocol tokenizes verified carbon credits (BCT / NCT pool tokens), bridging credits from registries like Verra onto chain for transparent on-chain offsetting and liquid carbon markets. BCT admin was transferred to KlimaDAO in 2024.
Tokenized verified carbon credits.
Assets under management
$536.6K
Latest data · 15 min delay
Bridges Verra-registry carbon credits on-chain into liquid BCT / NCT pool tokens for transparent retirement.
Toucan's original on-chain infrastructure for tokenizing verified carbon credits. A credit issued by a conventional registry (e.g. Verra) was retired off-chain and a matching TCO2 token minted on Polygon, one token per tonne of CO2. This retirement-based bridging was the mechanism Verra prohibited in May 2022; Toucan has since shifted toward registry-native and 'immobilized'/bi-directional bridging (e.g. its Puro.earth bridge).
A tokenized carbon credit. Each TCO2 is 1:1 linked to a specific real-world credit and carries that credit's attributes (project, vintage, methodology). Only TCO2s can be retired to claim the underlying climate benefit; carbon pool reference tokens must first be redeemed for TCO2s before retirement.
Toucan's first carbon reference token and pool, launched October 2021 alongside KlimaDAO. The BCT pool accepts a broad range of tokenized credits (fungible carbon commodity). BCT became the liquidity backbone for on-chain carbon, seeing multi-billion-dollar trading volume in its first weeks.
A more restrictive reference token/pool that accepts only nature-based credits (e.g. reforestation, conservation) using nature-based methodologies from 2012 onward. Designed to give higher-integrity, nature-focused exposure versus the broad BCT pool.
Smart-contract pools that bundle eligible TCO2s into fungible reference tokens (BCT, NCT) subject to on-chain 'pool acceptance criteria' (methodology, vintage, region). Pools provide deep liquidity and price discovery for otherwise heterogeneous carbon credits.
An automated bridge launched October 2023 connecting Toucan to Puro.earth's carbon standard, enabling instant settlement of engineered carbon-removal credits. This forms the basis of newer removal-focused products such as CHAR (biochar credits, launched March 2024).
Not a security; tied to Verra registry retirement.
Toucan Protocol~22 million Verra-issued carbon credits (≈4% of all issued credits) had been bridged on-chain via Toucan by May 2022.
S&P Global — Verra halts tokenization (May 2022)In roughly the first month after October 2021 launch, 12M+ carbon credits were bridged and on-chain carbon trading volume surpassed USD 2 billion.
Toucan blog — historyToucan states it has brought roughly USD 100 million in carbon credits on-chain since its 2021 launch.
Toucan Protocol contracts repo (GitHub README)How Toucan Protocol maps onto established TradFi structures, and where it diverges.
Voluntary carbon market (VCM) / carbon offset brokers
Toucan Protocol
Both let buyers acquire and retire carbon credits to offset emissions, sourced from registries like Verra using project, vintage and methodology attributes.
TradFi analogue
The traditional VCM is opaque, bilaterally brokered and slow to settle. Toucan puts credits on public blockchains as tradable tokens with transparent, composable settlement and pooled liquidity, but adds smart-contract, bridging and registry-recognition risks the off-chain market does not have.
Commodity registry / warehouse receipt system
Toucan Protocol
Like a commodity registry, Toucan maintains a ledger of standardized, fungible units (reference tokens like BCT/NCT) backed by underlying specific assets (TCO2s), enabling price discovery and exchange.
TradFi analogue
A commodity registry is centrally operated and legally authoritative; Toucan's ledger is on-chain and permissionless, and its authority depends on recognition by the source registry (e.g. Verra), which Toucan lacked when its retirement-based bridge was banned.
Toucan (Toucan Protocol)
Carbon market infrastructure developer Switzerland-based (Zug) team of technologists and carbon-market experts, co-founded by Raphaël Haupt (CEO), building open infrastructure for tokenized carbon. Operates as a small remote team backed by venture and climate funds; has stated intentions to progressively open-source the protocol.
Seed
2022-06-01Seed (amount undisclosed in sourced material)
Key milestones: launches, upgrades, exploits and governance events.
CO2ken prototype (ETHLondon)
ExecutedRaphaël Haupt and James Farrell built CO2ken, an early prototype carbon-offsetting app on Ethereum with a single carbon token and a DAO, at ETHLondon.
SourceProtocol + BCT launch
ExecutedToucan Protocol and the Base Carbon Tonne pool went live on Polygon alongside KlimaDAO.
SourcePivot away from retirement-based bridging
ExecutedFollowing Verra's ban, Toucan paused retirement-based bridging and committed to bi-directional / immobilized-credit bridging in cooperation with registries.
SourceRegistry-native removal bridging (Puro.earth)
ExecutedToucan shipped an automated Puro.earth bridge for engineered removals, executing its post-Verra strategy of registry-cooperative bridging.
SourceToucan builds public blockchain infrastructure for carbon markets. It tokenizes verified carbon credits so they can be traded, pooled and retired on-chain with transparency and composability, aiming to increase liquidity and integrity in the voluntary carbon market (VCM).
TCO2 is a tokenized carbon credit (one tonne, 1:1 with a real registry credit and its attributes). BCT (Base Carbon Tonne) and NCT (Nature Carbon Tonne) are fungible 'reference' tokens backed by pools of TCO2s: BCT accepts a broad range of credits, NCT accepts only nature-based credits. Reference tokens can be redeemed for TCO2s, and only TCO2s can be retired.
In May 2022 Verra prohibited creating tokens from already-retired credits, arguing that retirement means the environmental benefit has been consumed, so a token on top could enable double claims. Toucan had bridged roughly 22 million Verra credits (~4% of issued credits) using retirement-based bridging. Verra then opened a public consultation on a safer 'immobilized' credit model.
Toucan publicly welcomed the decision, said its retirement-based bridge had always been a compromise, asked bridgers to pause tokenization, and committed to participate in Verra's consultation and to keep the 'Web3 ethos alive' while moving toward bi-directional/immobilized bridging.
Toucan's carbon infrastructure originated on Polygon and has expanded to Celo and Base, targeting low-cost, proof-of-stake networks suited to high-volume, low-value carbon transactions.
