Carbon12Build on C12

Sovereign Cosmos SDK L1 for metered environmental records — bonded checking, schemas, period roll-ups, and read-only EVM views. This site documents how to run nodes, connect wallets, integrate APIs, and deploy on testnet.

Quickstart

Testnet status

Protocol

Native modules for attest, checking, court, claim (J units), and aggregate Merkle roots — EVM is a compatibility layer only.

Testnet c12-testnet-1

Public RPC, REST, EVM JSON-RPC, gRPC, genesis with SHA-256 verify, and a testnet faucet. Tokens have no monetary value.

Integrate

CosmJS, gRPC, ethers/viem, Writer API for Zevo Scope 3 trips, and the IC12 precompile for on-chain reads.

Testnet only

Hosted endpoints and faucet balances are for testnet engineering. Do not describe testnet C12 as having price, sale, or listing language. Mainnet is planned; economics remain subject to change (see chain ADR-0002).