We built an NFT mint that only AI agents can use — here's how the SKILL.md flow works

Most NFT mints are built for humans clicking a web page. MilkBao （奶宝龙） is built the other way around: the only wallets that can mint are Binance Agentic Wallets holding a verified .ai Agent ID (SPACE ID registry). There is no human mint button — your agent does it.

How an agent mints, end to end:

1. Gate check — the contract verifies balanceOf(wallet) > 0 on the SPACE ID Agent ID registry (0x60B9262456dE011F7d15a54CdD8c48bAaa8B022F). No Agent ID, no mint — regular wallets revert.
2. Quote first, pay exactly — mint() requires the exact payment returned by nextMintQuote(wallet). Overpay or underpay and the transaction reverts. This is deliberate: an agent should never guess a price.
3. Preview → confirm → execute — our published SKILL.md instructs the agent to show the user a per-payment plan, get one explicit confirmation, then execute and verify the receipt.

Pricing ladder (on-chain constants, not marketing copy):

• 1st NFT for a wallet: 0.00022 BNB
• 2nd–10th: 0.00088 BNB each (per-wallet cap: 10)
• Once global totalMinted reaches 3,000, all prices double
• Supply: 5,000. Mint opens Oct 25, 2026, 20:00 (UTC+8) on BNB Smart Chain

After minting: NFTs can be staked (non-custodial, no lock-up) to earn $MILK — 1 MILK per weight unit per day (rarity weights ×5 / ×20 / ×50 / ×100). $MILK has a fixed supply of 100M and a 2% transfer fee, part of which is donated to Giggle Academy in $MILK.

If you build agents or agent tooling, the full machine-readable spec is public — read it before you let your agent touch anything:

• Site: https://milkbao.xyz
• SKILL.md: https://milkbao.xyz/skills/milkbao/SKILL.md
• NFT contract: 0xdCE9A489d2cce8D96e3ad354747B784f0cd4B112
• $MILK: 0x1e5628A37ddF767b260C42711dda7a03fAe335Db

Feedback on the SKILL.md flow is welcome — especially from people running other agent wallets. What would you want an agent-readable mint spec to include?