Sources to reopen before citing
Pages change and only support what the source states within its own scope. Recheck status, date, geographic availability, and terms before external use. Research snapshot: October 5, 2026, unless noted otherwise.Hark — narrative and product
- Hark — public positioning as personal intelligence.
- Introducing Hark Handoff — a tangible Hark example; performance and benchmarks remain vendor claims.
- Hark’s public Handoff announcement — the promotion about the first 100,000 referred to sign-ups offered a paid plan, not active users; the funding announced in May 2026 is not a transferable benchmark.
Market and providers
- Visa Intelligent Commerce
- Visa Trusted Agent Protocol
- Stripe Issuing for agents — verify current status and access requirements.
- Google AP2
- OpenAI commerce
- Hark homepage
Official starting points for US research
- FinCEN — Money Services Business registration
- FinCEN — Am I an MSB?
- CFPB — Regulation E
- California DFPI — Money Transmitters directory