Payclaw

kya labs — Badge + Spend for AI Agents

Your agent isn't a bot. kya proves it — then lets it pay.

Your AI agent looks like a bot to every merchant on the internet. kya gives it two things:

Badge — Declares your agent as an authorized actor. The Universal Commerce Protocol "identity" token for a merchant handshake. Free. No card required.

Spend — Issues a single-use virtual Visa when your agent needs to pay. Human-approved. Self-destructs after use. Your real card never enters the chat.

If you're like 20% of Americans last year - you used an agent to shop. And you probably ran into a ton of login walls, workarounds, bumps?

So did we. So we created kya - the first MCP tool suite that works with the new Universal Commerce Protocol to easily handshake verified agents at supporting merchants (Shopify, Target, Walmart, Etsy... it's a lot). Badge for identity. Spend for payment.

🧪 Developer Sandbox is open. Real infrastructure, test money. Get sandbox access →

[npm version] [License: MIT]

Quick Start

npx @kyalabs/mcp-server

OR add to your MCP client config (Claude Desktop, Cursor, or any MCP client):

{  "mcpServers": {    "kyalabs": {      "command": "npx",      "args": ["@kyalabs/mcp-server"]    }  }}

That's it. Badge works immediately — no API key, no signup, no network calls on install.

The first time your agent calls kya_getAgentIdentity, it declares itself to the merchant and gets back a response with next_step guidance. One anonymous event is recorded. Your agent is now a declared, authorized actor.

Or install via ClawHub:

clawhub install payclaw-io

Upgrade to verified mode + Spend

For cryptographic identity and virtual card issuance, add an API key:

"env": {  "KYA_API_KEY": "pk_live_your_key_here",  "KYA_API_URL": "https://www.kyalabs.io"}

Get your API key at kyalabs.io/signup. API keys don't expire.

Without an API key, Badge uses device auth when a merchant requires verified identity — your agent shows a code and URL, you approve on your phone. This only happens when a merchant asks for it. We never ask for it ourselves. Sign up + API key means 1. you dont have to use phone OAuth every time and 2. you can track your agentic shopping (custom avatars included)

Node version

kya MCP requires Node.js 20 or newer. Node 18 is end-of-life and unsupported.

If you see engine or compatibility errors: node -v — install Node 20+ from nodejs.org or nvm install 20

How Badge Works: Two Modes

Declared (default)

First time your agent goes to a merchant with Badge, Badge generates an anonymous install ID — a random UUID stored locally at ~/.kya/install_id. It has no connection to you, your device, or any personal information.

Your agent gets back a declaration and a next_step guiding it to report its badge presentation at the merchant.

This is the default mode. It's how Badge works out of the box, for every user, forever.

Verified (when merchant requires it)

When a merchant requires verified identity — their UCP manifest says required: true — your agent will ask you to approve a device flow. You visit a merchant-kya URL, enter the OAuth code from your agent, and prove you're a real person.

Badge issues a tokenized credential: an ES256-signed JWT, signed by kya's private key, verifiable locally by the merchant. Your agent is free to continue - no login, PII or anything needed.

Our Data Philosophy

The server start ping contains no persistent identifiers — a new random session ID is generated each time and never saved to disk. You can disable it entirely:

"env": { "KYA_PING": "false" }

The install_id is a file we wrote to your disk. You can delete it (rm ~/.kya/install_id) and get a new one.

Full data practices: kyalabs.io/trust

The Universal Commerce Protocol

Badge is a UCP (Universal Commerce Protocol) Credential Provider. Merchants who declare the kya identity extension signal to every UCP-compliant agent that authorized agents are preferred at their store.

When your agent encounters a UCP merchant with Badge installed, it presents a cryptographic badge automatically — no extra steps.

We believe the UCP is the future of commerce and are proud to support reduce friction for agents and users.

• Extension spec + schema: github.com/kyalabs/ucp-agent-badge
• Read more about the UCP: github.com/universal-commerce-protocol/ucp

Without kya: Agent browses → bot detection fires → blocked. Even if it gets through, it can't check out without your real card number. You're stuck finishing manually.

With Badge: Agent declares itself as an authorized actor → merchants see a verified identity → agent gets through. No bypass. Just proof.

With Spend: Agent declares a purchase → you approve with a tap → kya issues a single-use virtual Visa locked to that merchant → agent checks out → card self-destructs. Your real card never enters the chat.

Your agent will recognize when it needs this. When it encounters a merchant that may challenge automated traffic, or when it's ready to check out, it tells you: "I need kya installed to complete this." You click Allow. Done.

Tools

See docs/tool-contract.md for the formal input/output contract.

Every Badge tool call works immediately — no auth required. Events fire in both anonymous and verified modes.

Badge: Declare Identity

Agent → kya_getAgentIdentity({ merchantUrl })kya → browse_declared event fires automaticallykya → verification token + next_step + checkoutPatch (if merchant supports UCP)Agent → merges checkoutPatch into checkout payloadAgent → kya_reportBadgePresented({ merchantUrl, verification_token })Agent → kya_reportBadgeOutcome (accepted | denied | inconclusive)

Spend: Get a Card

Agent → kya_getCard (merchant, amount, description)User → approves via MFAkya → issues single-use virtual VisaAgent → uses card at checkoutAgent → kya_reportPurchase (closes audit trail)Card → self-destructs

One task. One approval. One card. Done.

Extended Auth (optional)

When enabled, kya checks back with your agent 7 seconds after each badge presentation to confirm whether the merchant accepted or denied. Results are logged to your dashboard so you can see when and which merchants are rejecting your agent.

"env": {  "KYA_EXTENDED_AUTH": "true"}

How Authorization Scales

Browsing requires declaration. Spending money requires declaration + stated intent + explicit human approval + an ephemeral card that self-destructs after one use.

Why kya labs

Badge Only?

If you only need identity (no payment), use the lighter package:

npx @kyalabs/badge

What's New (v2.3)

KYA — Know Your Agent

kya is KYA infrastructure. Every declaration creates a verified record of agentic commerce behavior — building the trust signal that merchants need to tell authorized agents from anonymous bots.

Links

• Website: kyalabs.io
• npm: @kyalabs/mcp-server
• Badge npm: @kyalabs/badge
• UCP Extension: github.com/kyalabs/ucp-agent-badge
• ClawHub: payclaw-io
• Trust: kyalabs.io/trust
• Merchants: kyalabs.io/merchants
• Contact: [email protected]

Agents are not bots. kya labs proves it. Your real card never enters the chat.