merchant-console-demo

EdgeMeter — a Railway-first demo of Radius x402 paid API endpoints. A fictional security-intelligence vendor exposes four GET endpoints, each gated by an HTTP 402 + x402 payment requirement. Pay-per-call settles in SBC on Radius Mainnet (or Testnet) via a facilitator, then returns the JSON response.

Live demo: https://merchant-console-demo-production.up.railway.app

This is a demo, not production software. It exists to illustrate the x402 payment flow on Radius. Stats are in-memory and reset on every deploy, the response payloads are deterministic fakes, and there is no rate limiting, authentication, or persistence. By default it points at Radius Mainnet and moves real SBC on every paid call — fork it for learning, don't ship it as a real payment processor.

What it shows

• HTTP 402 + x402 payment-required responses with EIP-712/Permit2 payment requirements
• Verify + settle flow against a Radius facilitator (facilitator.radiustech.xyz / facilitator.testnet.radiustech.xyz)
• Sub-second settlement on Radius — measured per request and surfaced in the UI
• A merchant-side console UI rendering live stats, recent paid events, and a swarm visualization of agent traffic

Endpoints

ID	Path	Price	Purpose
threat	GET /api/x402/threat/:ip	0.00025 SBC	Reputation, bot probability, network owner for an IP
bot-score	GET /api/x402/bot-score/:domain	0.00005 SBC	Machine-traffic likelihood for a domain
reputation	GET /api/x402/reputation/:indicator	0.00010 SBC	Risk history for an IP/domain/wallet/UA
url-risk	GET /api/x402/url-risk?url=...	0.00040 SBC	Phishing/malware/automation signals for a URL

Switch network with ?network=testnet. Default is mainnet.

Free metadata endpoints: /api/health, /api/catalog, /api/baseline, /api/stats.

Local development

npm install
npm run dev          # tsx, hot-reload-ish
# or
npm run build && npm run start

Server listens on process.env.PORT ?? 3000.

Deploy

Already configured for Railway via railway.toml (RAILPACK builder). The production Railway service is connected to radius-workshop/merchant-console-demo and deploys from main.

To redeploy manually from local:

railway up --detach -m "your message"

Configuration

All env vars are optional — sane mainnet + testnet defaults live in src/network-config.ts. Override per-network with _MAINNET / _TESTNET suffixes (or set the unsuffixed name to apply to both):

Var	Default
PORT	3000
PAYMENT_ADDRESS	0x08A51318C08A31E71b9489f578BbB2B5b7E5E329
SBC_TOKEN_ADDRESS	0x33ad9e4bd16b69b5bfded37d8b5d9ff9aba014fb (mainnet)
RPC_URL_MAINNET / RPC_URL_TESTNET	Radius public RPCs
FACILITATOR_API_KEY	unset (no auth header sent)
X402_PERMIT2_PROXY	0x402085c248EeA27D92E8b30b2C58ed07f9E20001
BATCH_CONTRACT_ADDRESS	network-specific

Tech notes

• Pure Node.js HTTP server (node:http) — no Express, Fastify, or any production dependencies.
• TypeScript with NodeNext module resolution; imports use .js extensions.
• Stats are in-memory only; a redeploy resets them.
• Frontend HTML and the swarm visualization JS are server-rendered from TS in src/frontend.ts and src/swarm.ts.