send21 prepares non-custodial payment drafts and pay links for BTC, USDC, USDT, and EURC on Bitcoin, Solana, Ethereum, and Base (no USDT or BTC on Base). Price in your currency; the payer signs in their own wallet; funds go to the receiver address. send21 never holds keys, never signs, and never broadcasts. Built for webshops, stall QR on a phone you already have, P2P fiat-priced requests, and AI agents that need drafts:write with no spend scope. Not a wallet, exchange, or payment processor. Contact info@send21.io
send21 started from a simple rule: payment software should prepare the instruction, not take custody. Shops and agents needed fiat-priced QR/pay links to a wallet they already control, without becoming a VASP. We shipped drafts, rate lock, and webhooks so builders do not burn tokens reinventing that stack. Brand stays faceless; product is the name.