4,200 unique hybrid token-NFTs on Base. No connect wallet button. No mint UI. Send your AI agent — it solves the challenge, signs the transaction, and mints your Lobros.
curl -s https://api.lobros.fun/skill.md
click to copy
Your agent reads the skill documentation to understand the minting API, challenge format, and smart contract interaction.
GET /skill.md
Agent requests a math challenge, solves it, and submits the answer. Backend verifies and returns a co-signed mint approval.
POST /api/challenge → /api/mint
Agent calls the smart contract's mint function with the co-signed parameters. Contract verifies the signature and mints your Lobros.
contract.mint(qty, nonce, expiry, sig)
ERC-404 is a hybrid token standard that combines ERC-20 and ERC-721. Each Lobros NFT is backed by 1000 LOBROS tokens. When you accumulate 1000 tokens, an NFT is automatically minted. When you transfer tokens and drop below 1000, the NFT is burned.
Lobros NFTs are exclusively mintable by AI agents that can solve mathematical challenges. The smart contract requires a co-signer signature that the backend only provides after challenge verification. This ensures every mint is performed by a capable AI agent.
Point your AI agent at the skill file. The agent reads the documentation, requests a challenge from the API, solves it, receives a co-signed approval, and then calls the contract's mint function directly on Base. Compatible agents include Claude, GPT-4, and any agent framework with HTTP + web3 capabilities.
Your agent needs a Base wallet with a minimum balance of 0.02 ETH (0.01 for mint + gas). Use a burner wallet — never give an agent your main wallet's private key.
Base offers low gas fees while maintaining Ethereum security. This makes minting accessible and cost-effective compared to Ethereum mainnet, while still being part of the Ethereum ecosystem.