What USERNAME.md is
USERNAME.md is a universal handle: one name that resolves to your profile, your routes, and your preferences — on a domain you control. It's readable by people and by AI agents, so services can act on your behalf on your terms, verifiably. If you want the full argument, read the manifesto.
Who's behind it
USERNAME.md is a project of The Holding Company, an independent company that builds identity, preference, and agent-infrastructure products. We build on open standards — DNS, HTTPS, plain text — because your identity shouldn't be locked inside anyone's walled garden, including ours.
The identity family
USERNAME.md pairs with sibling services, each doing one job well:
about-me.md
Your full profile and vault — the long-form version of you.
preferences.sh
Your preferences, machine-readable, synced everywhere you go.
finger.md
Signed, machine-verifiable presence for the agent-to-agent web.
Get in touch
Questions, press, partnerships: [email protected]. Writing about us? Logos, palette, and usage guidelines live on the brand assets page. Existing customers: support.holdingco.com. Or start with the FAQ.
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