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io.github.payclaw/badge

Official registry AI and agents

Agents are not bots. Prove it. MCP-native identity declaration for authorized agents.

Source code Documentation

Install

Add this to your client's MCP configuration (Claude Desktop: claude_desktop_config.json; Cursor: .cursor/mcp.json; VS Code and others use the same "mcpServers" shape).

NPM package @payclaw/badge
Claude Code 
claude mcp add badge -e 'PAYCLAW_API_KEY=<your payclaw_api_key>' -e 'PAYCLAW_API_URL=<PAYCLAW_API_URL>' -- npx -y @payclaw/badge@0.4.0
JSON configuration (Claude Desktop, Cursor, VS Code) 
{
    "mcpServers": {
        "badge": {
            "command": "npx",
            "args": [
                "-y",
                "@payclaw/badge@0.4.0"
            ],
            "env": {
                "PAYCLAW_API_KEY": "<your payclaw_api_key>",
                "PAYCLAW_API_URL": "<PAYCLAW_API_URL>"
            }
        }
    }
}

Environment variables

  • PAYCLAW_API_KEY required secret Your PayClaw API key (get one at payclaw.io)
  • PAYCLAW_API_URL PayClaw API URL (default: https://payclaw.io)

Documentation

From the project's README on GitHub, refreshed weekly. Links open on GitHub.

Contents
  1. Badge by kya labs
  2. Badge SDK
  3. Badge MCP Server
  4. Links
  5. License

Badge by kya labs

Persistent identity for AI agents across merchant sites. Badge gives agents a credential they carry on every request — merchants verify it, trust accumulates across visits, and agents that build history earn better treatment over time.

Framework-agnostic. Transport-agnostic. Zero runtime dependencies.

Badge SDK

The SDK is the primary integration surface. Three methods cover the full lifecycle:

import { Badge } from "@kyalabs/badge-sdk";

const badge = await Badge.init();
const runId = badge.startRun();

await badge.declareVisit({
  merchant: "store.example.com",
  runId,
  url: "https://store.example.com/cart",
});

await badge.reportOutcome({
  merchant: "store.example.com",
  runId,
  outcome: "not_denied",
});

No signup. No API key. Badge.init() issues a guest pass on first run and caches it to disk. Identity survives process restarts.

npm install @kyalabs/badge-sdk

Full SDK documentation →

What the SDK covers
  • Identity model — three-tier ladder: guest pass (gp_v1_*) → badge token (kya_*) → authenticated identity
  • Lifecycle tracking — declare visits, report outcomes, correlate with run IDs
  • Offline resilience — never throws on network failure, deterministic fallback on every call
  • UCP integration — io.kyalabs.common.identity Credential Provider, published schemas, ES256-signed JWTs
  • Scoring — outcomes feed kyaScore (500–850), portable across merchants

Badge MCP Server

For MCP client users (Claude Desktop, Cursor, Windsurf), Badge also ships as an MCP tool server. The MCP server wraps the SDK — same identity model, same tokens, same scoring.

npx @kyalabs/badge

The SDK is the canonical integration path for platform builders and agent frameworks. The MCP server is a convenience wrapper for end users working within MCP clients.

License

MIT

Frequently asked questions

What is io.github.payclaw/badge?

Agents are not bots. Prove it. MCP-native identity declaration for authorized agents.

How do I install io.github.payclaw/badge?

It runs on your machine. In Claude Code: claude mcp add badge -e 'PAYCLAW_API_KEY=<your payclaw_api_key>' -e 'PAYCLAW_API_URL=<PAYCLAW_API_URL>' -- npx -y @payclaw/badge@0.4.0. For other clients, paste the JSON configuration from this page into their MCP settings.

Does io.github.payclaw/badge need an API key?

Yes. It expects PAYCLAW_API_KEY, which you set in its configuration.

Is io.github.payclaw/badge open source?

Yes. Its code is on GitHub under the MIT license.

Who maintains io.github.payclaw/badge?

It is published by payclaw. AI.tn lists it but does not maintain or endorse it.

From the official MCP Registry. Listing is not an endorsement: review a server's code and permissions before giving it access to your data.