x402watch

Wash-filtered intelligence layer for the x402 ecosystem.

x402watch indexes 36,000+ x402 services across Base, Solana, Polygon, and Arbitrum, classifies them with AI, and detects wash trading patterns using cohort signal analysis. All data is published daily under CC0.

4-Axis Differentiation

1. Wash Filter — 8-label classification + cohort signal detection

2. Free Public Data — every label, every benchmark

3. Time-Series Asset — daily snapshots committed to GitHub

4. AI-Native — public API, MCP server (Day 21), llms.txt

Live

• Site: https://x402.printmoneylab.com

• API: https://api.x402.printmoneylab.com/api/v1

• API docs: https://api.x402.printmoneylab.com/docs

• Data: https://github.com/printmoneylab/x402watch-data

• Methodology: https://x402.printmoneylab.com/docs/methodology

Tech Stack

• Backend: FastAPI + PostgreSQL (TimescaleDB) + Redis

• Frontend: Next.js 16 + Tailwind v4 + Recharts

• Indexing: Helius (Solana), public RPC (Base/Arbitrum)

• AI: Claude Haiku 4.5 (categorization), Claude Sonnet 4.5 (validation)

• Hosting: Oracle ARM (free tier) + Vercel + Cloudflare

Repository Layout

This repo holds the public Next.js site under src/. The methodology markdown lives in content/methodology.md and is rendered at /docs/methodology. The FastAPI backend and indexers live on a separate Oracle host.

License

• Code: Apache 2.0 (see LICENSE)

• Data: CC0 (public domain), published daily to x402watch-data

Status

Phase 1 MVP — under active development. Issue templates and contribution guidelines coming as the project stabilizes.

Built by PrintMoneyLab.