PLATFORM · DEVELOPERS

    What we're building next.

    The card is the front door; the platform is everything behind it. For developers and partners — coming soon, previewed here.

    API

    Waitlist

    Build Harmoney payments into your own product.

    A REST API for payments, bookings, catalogs, and tap cards — the same building blocks this site runs on. Docs coming soon.

    MCP SERVER

    Waitlist

    Connect Harmoney to AI tools and assistants.

    An MCP server that lets AI tools and assistants work with your Harmoney account — drafting invoices, checking sales, programming cards — with you in control.

    KYA PROTOCOL

    Open standard

    Know Your Agent.

    An open-source standard for verifying the identity and permissions of software agents before they act. Apache-licensed and built in the open.

    kyaprotocol.org →

    AAP

    Open standard

    Agent Approvals Protocol.

    An open standard for defining what an automated action is allowed to do — with approvals and a simulation step before anything runs.

    kyaprotocol.org →

    Join the waitlist.

    First in line for API docs, MCP access, and partner onboarding.