Self-serve · zero human contact · runs entirely in your browser

Claim your invite, seal your first receipt

Everything below runs live against the real, public Open Evidence Rail API from your browser — nothing is simulated. Have an invite code (e.g. OER-VILLAGE-ALPHA)? Claim it, and this page will register a test format, seal a real receipt, and verify it offline for you, end to end.

1

Claim your invite code

2

Your API key

Generated for a fresh tenant, in your browser, from this page's claim call — never seen by any human on our side.

3

Register a format

Registers plain-json@1.0.0 (the zero-friction on-ramp — any JSON object, no schema constraints) if it doesn't already exist, or resolves it if it does. Same call the public SDK's plain-json adapter makes.

4

Seal a receipt

Seals a small demo payload through the format above, using the real POST /api/v1/rail/seal endpoint.

5

Verify it

Fetches the signed evidence bundle and checks the Ed25519 signature via Web Crypto, right here in your browser — the same offline check anyone, anywhere, with no CapchaCloud account, can run against your receipt forever.

No invite code? Codes are handed out to Village participants and early integrators. Everything above also works with a regular provisioned API key — see the Open Evidence Rail overview for the full SDK quickstart.