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Start freeGet verified — free
NEWCheck any seal in your browser →

Proof a real human did it.

Human verification for people and AI agents. 5arz seals each action with a signed credential anyone can check — free, without asking us.

Start free Check a seal
  • Free to verify
  • Works offline
  • API and MCP
AI-generated image
Verified humanID + liveness · just now
★ SealValid
WHOVerified personDIDApproved paymentWHENJust now
A person verified on her phone, and the seal that proves it.
7,500+
human tasks completed
$0
to verify any seal
51%
of web traffic is bots*
1 call
to verify with API or MCP

*Imperva Bad Bot Report, 2025

How proof of personhood works

See a seal happen.

Four steps, about ten seconds. Tap a step or let it play.

Try it with a real seal
Step 1 of 4 · Verify onceSample
3D phone running a face liveness scan
Verified human ✓
On your own phone
ID document
Liveness
Done by our ID partner. 5arz never sees your selfie.
3D render of a phone with a verification check next to an ID card
The difference

An ID says who you are. A seal proves what you did.

  • One verified person
  • One exact action, one moment
  • Tamper-proof — change one character and it fails
Try it yourself →
Products

One seal. Many uses.

See all products →
Live

Proof-of-Human API

Confirm a real person is behind any action.

Learn more →
Live

Know Your Agent

Prove there’s a real person behind an AI agent.

Learn more →
Early access

Data and evals

Human-labeled data with a seal on every row.

Learn more →
Testnet

On-chain personhood

A credential smart contracts can check.

Learn more →
Built for AI agentsLive

Know Your Agent

AI agent verification: prove a verified person stands behind every agent you run.

  • pop_jwt credential
  • MCP server
  • Free to start
Register an agent Learn about KYA
51%bots
Why now

Most of the web is bots. Your systems still assume a person.

A seal turns that guess into proof — a bot detection alternative that doesn’t guess.

Bots · 51% Humans · 49%

Imperva Bad Bot Report, 2025

For developers

Verify in three lines.

Any JWT library works. No account needed to check.

32API endpoints
9MCP tools
ES256signatures
Read the docs →
verify.js
import { importJWK, jwtVerify } from "jose";

const key = await importJWK(jwk, "ES256");
const { payload } = await jwtVerify(seal, key);
Man doing a short task on his phone in a café AI-generated image
★ Task sealedStars added to your balance
For people

Get paid for being human.

Verify once. Then earn Stars for short tasks only a person can do.

  • Free to join, always
  • Cash out from 23 Nov 2026
  • Paid in USDC to your own wallet

Tasks depend on demand, so earnings aren’t guaranteed.

Get verified — free How it works

Don’t trust us. Check.

Start free. No card, no sales call.

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