Finance & Business4 hours ago
hashcash — pay USD to any email
Send USD payments to any email address; recipients claim with Google without needing a wallet.
@RyanChang720 · X
A tool that can send crypto by email
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Send USD payments to any email address; recipients claim with Google without needing a wallet.
@RyanChang720 · X
A tool that can send crypto by email
Send and receive money in USD, EUR, and NGN with a debit card.
@FischervHelene · X
Check out what I just built with Lovable!
Settle USDC payments atomically on Base L2 in under 2 seconds for AI agents.
@CRYPtoKong32 · X
also Join our $MUSKOX Ai Ecosystem built on Base Coin. 🪙 $AGWC Websites:
Email verification API with real-time validation via syntax, domain, MX, and SMTP checks.
@sachinbapure · X
Set up free business email accounts on your domain with webmail and API.
@collinsjimu404 · X
Ready to ditch gmail and yahoo emails for something professional? Claim up to 15 FREE business email accounts on your own domain ([email protected]). No card needed. Quick setup. Professional, secure, and built to grow your brand. Start now.
Embed a payment button on your website to accept payments instantly.
@coinmoebius · X
We built the buy button founders and merchants need. We'll be their payment layer.
Set up a paid contact link for your bio where visitors deposit money to email you—reply to refund them or keep the fee.
@NicholasalohciN · X
goodfaith — a paid contact link for your bio. strangers pay a deposit to email you. reply and they get it back. ignore them and you keep it. reply = free, silence = pays you. turns "please stop pitching me" into "sure, put money behind it."
Create and own AI agents as NFTs with custom skills that earn USDC daily.
@CRYPtoKong32 · X
also Join our $MUSKOX Ai Ecosystem built on Base Coin. 🪙 $AGWC Websites:
Generate follow-up emails for unpaid invoices instantly, no signup needed.
@forgeos_ai · X
🚀 First public build. I just launched Forge Invoice — a tiny tool that helps freelancers generate follow-up emails for unpaid invoices. No signup. Free. Copy & send instantly. I'd love your feedback. #buildinpublic #indiehackers
AI contract reviewer that flags risks and tracks signatures directly from your inbox.
@raeezatameez · X
dropping mine - would love your take!
Protect your email and calendar by requiring unknown senders to solve a CAPTCHA or pay a fee.
felixdoerp · HN
Hi HN, The one thing AI reliably does is generate noise. Half the tools I see launch are just machines for producing more noise across more channels. And people are starting to see this in the form of emails in their inboxes as spam filters are struggling. There used to be a useful signal in email: the effort a sender put into customizing a message was a rough proxy for how relevant it actually was. AI killed that. Now it's customized slop with the appearance of effort with none of the cost. It is painful that the open internet / open channels have been abused like this. Captchainbox applies the idea of proof-of-work to email. If a sender is willing to do a bit of work to reach you, the message is more likely to be worth your time and the sender more likely to be real. The work is a traditional captcha. You can also set a pay-to-deliver amount if you want more friction. The proceeds of the delivery payment after transaction costs go to the Internet Archive and the EFF. The tool curr
Purchase international travel eSIM profiles with cryptocurrency, delivered instantly via QR code, no registration required.
@tigerfpvteam · X
Building - eSIM store for buying eSIM instantly without any registration. For now supports only crypto payments but It's only starting point :)