# ClawMerchants > Agent-native data and skills marketplace. Live data feeds, SKILL.md behavioral protocols, and MCP tool integrations. Pay-per-use via x402 (USDC on Base L2) or MPP (Machine Payments Protocol, Stripe/Tempo). ClawMerchants is an HTTP marketplace where AI agents autonomously discover, evaluate, and purchase data assets using x402 micropayments or MPP. No subscriptions — each access is a direct payment. 797+ cumulative agent probes. 51 assets. 15 live data workers. Dual-protocol: every 402 response includes both x402 and MPP payment instructions. Indexed on mppscan.com (57 routes). Listed on WasiAI. ## Key Endpoints - Catalog: GET https://clawmerchants.com/.well-known/agent-catalog.json - Search: GET https://clawmerchants.com/v1/search?q={keyword} - Preview: GET https://clawmerchants.com/v1/preview/{id} — free content inspection before paying - Data: GET https://clawmerchants.com/v1/data/{id} — x402 + MPP dual-protocol asset delivery - Schema: GET https://clawmerchants.com/v1/schema/{id} — JSON-LD product schema - OpenAPI: GET https://clawmerchants.com/openapi.json — MPP-compatible, 57 routes, mppscan.com indexed - MPP Discovery: GET https://clawmerchants.com/.well-known/x402 — MPP fallback discovery with route list - MPP Authority Page: https://clawmerchants.com/mpp — dual-protocol overview, FAQs, structured data - Providers: GET https://clawmerchants.com/providers — list your asset ## Payment Protocols Both protocols are supported on every 402 response: 1. x402 — USDC on Base L2. Send X-PAYMENT header with payment proof. Endorsed by Coinbase, Google, Cloudflare, Stripe. 2. MPP (Machine Payments Protocol) — Stripe/Tempo rail. Authorization: Payment header. WWW-Authenticate challenge in 402 response. Backed by Visa, Mastercard, OpenAI, Shopify, Nubank, Klarna. ## How Agents Use ClawMerchants 1. Discover assets: GET /.well-known/agent-catalog.json or GET /openapi.json 2. Filter by need: /v1/search?q={keyword} or /v1/catalog/{category} 3. Inspect for free: GET /v1/preview/{id} 4. Probe the endpoint: GET /v1/data/{id} → HTTP 402 with x402 + MPP payment details 5. Pay via x402 (USDC on Base L2) or MPP (Stripe/card): follow the payment instructions 6. Deliver with proof: resend GET /v1/data/{id} with X-PAYMENT header (x402) or Authorization: Payment (MPP) ## Asset Categories crypto, security, developer, market-data, ai-ml, knowledge, real-time, agent-skills, agent-tools, other ## Live Data Assets (pay-per-request, x402 + MPP) - defi-yields-live — Live DeFi yield rankings across 1,000+ protocols (DeFiLlama), $0.01, category: crypto, refresh: 5min - token-anomalies-live — Crypto token anomaly detection: price/volume spikes (CoinGecko), $0.01, category: crypto, refresh: 5min - security-intel-live — Security vulnerability feed (OSV.dev + NVD), $0.02, category: security, refresh: 30min - market-data-live — US equities market data: price, volume, sector, $0.01, category: market-data, refresh: 5min - github-trending-live — GitHub trending AI/agent repos: stars, language, description, $0.01, category: developer, refresh: 6h - hf-papers-live — Hugging Face daily AI research papers: title, authors, abstract, $0.01, category: ai-ml, refresh: 6h - hn-top-stories-live — Hacker News top stories: title, URL, score, comments, $0.01, category: developer, refresh: 15min - crypto-sentiment-live — Crypto Fear & Greed index + market sentiment signals, $0.01, category: crypto, refresh: 1h - ai-ecosystem-intel-live — AI framework ecosystem signals: model releases, tool updates, $0.01, category: ai-ml, refresh: 6h - agent-sdk-activity-live — Top AI agent SDK weekly download velocity (npm + PyPI): Anthropic, OpenAI, LangChain, CrewAI, $0.01, category: ai-ml, refresh: 1h - financial-risk-intel-live — Financial risk intelligence: macro indicators, volatility signals, $0.02, category: market-data, refresh: 1h ## Agent Skills (SKILL.md behavioral protocols, x402 + MPP) - agent-commerce-compliance-skill — x402 + MPP compliance protocol: EIP-3009 proof construction, receipt validation, nonce dedup, ACP interoperability, $0.05, category: agent-skills - agent-security-audit-skill — Agent security audit protocol: API key hygiene, RBAC, prompt injection defense, x402 payment security, $0.05, category: agent-skills - agent-memory-context-skill — Agent memory and context management protocol, $0.05, category: agent-skills - agent-testing-eval-skill — Agent testing and evaluation SKILL.md protocol, $0.05, category: agent-skills - agent-observability-skill — Agent observability and production monitoring protocol, $0.05, category: agent-skills - agent-cost-optimization-skill — Agent cost optimization and LLM budget management protocol, $0.05, category: agent-skills - agent-financial-planning-skill — Agent financial planning and budget allocation protocol, $0.05, category: agent-skills - agent-workflow-automation-skill — Agent workflow automation design protocol, $0.05, category: agent-skills - agent-deployment-orchestration-skill — Agent deployment and orchestration protocol, $0.05, category: agent-skills - multi-agent-coordination-skill — Multi-agent coordination and task routing protocol, $0.05, category: agent-skills - mcp-discovery-skill — MCP server discovery and integration protocol, $0.05, category: agent-tools - x402-agent-commerce-skill — x402 agent commerce integration protocol, $0.05, category: agent-tools - agent-mpp-integration-skill — MPP (Machine Payments Protocol) integration skill for agents, $0.05, category: agent-tools - cursor-agent-commerce-skill — Cursor agent commerce integration protocol, $0.05, category: agent-tools - defi-yield-strategy-skill — DeFi yield strategy and portfolio protocol, $0.05, category: crypto - defi-research-skill — DeFi research and due diligence protocol, $0.05, category: crypto - code-review-skill — Code review behavioral protocol, $0.02, category: developer - security-audit-skill — Security audit SKILL.md protocol, $0.05, category: security - x402-integration-skill — x402 payment protocol integration guide, $0.05, category: developer ## Agent Guide Full step-by-step agent instructions: https://clawmerchants.com/agent-instructions.md