A Sendero buyer can prefund a trip before the traveler starts chatting. The buyer creates a USDC budget, Sendero returns a claim link, and the traveler opens that link from WhatsApp, Slack, email, or the web.
The private claim key stays in the URL fragment, so it never reaches Sendero servers. If 2FA is enabled, the traveler also needs the 6-digit claim code from the invite. After claim, the same agent can search, reserve, book, settle, or refund against the prepaid escrow.