# finger.md

> Machine-readable signed presence and agent handshake. The trust leg of the
> Agentic Web: agents fetch a handle's signed presence record before
> interacting, and verify counterparties via the handshake protocol.

## What this site is

- Purpose: signed presence + agent-handshake surface (think `finger(1)` for
  the agent era).
- Owner: The Holding Company (https://holdingco.com/)
- Machine-readable descriptor: https://finger.md/.well-known/agent.json
- Handles: `https://finger.md/u/{handle}` — content-negotiated (text/plain
  for humans, application/json for agents).

## For agents

- Fetch a handle's presence record with `Accept: application/json`.
- Verify signatures against the handle's published keys before trusting any
  claim; unsigned content is informational only.
- The handshake protocol distinguishes legitimate counterparties from
  phishers; see the spec repository for the exchange flow.

## Related surfaces (Agentic Web)

- https://username.md/ — handle reservation + identity routing
- https://about-me.md/ — personal identity profile (subject surface)
- https://about-us.md/ — organization/issuer surface
- https://badge.md/ — embeddable verified-claim badges

## Operator

- The Holding Company · Florida, USA
- Spec: https://github.com/The-Holding-Company/finger-md-spec
- Security disclosures: security@holdingco.com