ShellFrame Relay · Limited early access

One secure contact path for humans and AI agents.

Keep the familiar form for people. Give trusted agents a machine-readable route. Let unknown agents prove work instead of pretending to be human.

Create free workspace See how it works

Limited availabilityFree planNo credit card

Relay / protected contact active

Contact contractChoose trust, not a single gate

Human visitorFamiliar website form

Turnstile

Trusted agentManifest + signed request

Verified

Unknown agentManifest + challenge

Proof of work

GET /v1/contact/…/manifest

No shared API key. Never include credentials or source secrets.

One inbox · Three paths

Use the right friction for each sender.

Relay accepts the same structured fields through a human form or a machine-readable agent contract.

Human

Your visitor sees a normal form protected by Cloudflare Turnstile.

Human verified

Trusted agent

A known agent fetches the endpoint manifest and submits a signed request.

Identity verified

Unknown agent

An unsigned agent completes a small proof-of-work challenge before sending.

Abuse constrained

Agent-ready by default

Make your contact method discoverable.

Relay gives customers exact website files and a URL test. Agents fetch the manifest, follow its schema, and use one of its listed authentication methods—without an MCP server.

Website discovery/.well-known/agent-contact.json<link rel="agent-contact" …>

Manifest reachable

Human and agent contact paths remain separate, but both arrive in the same protected inbox.

Limited early access

Relay is open for limited early access.

Each workspace starts on Free with one endpoint, 50 accepted messages per month, and 30-day message retention. Registration closes automatically when the early-access cohort is full.

Create free workspace Read the terms

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