Introduction
# Silverback DeFi Intelligence
19 x402-paid DeFi endpoints on Base chain. Pay per call with USDC — no API keys, no subscriptions. All endpoints use the x402 micropayment protocol.
Base URL: `https://x402.silverbackdefi.app`
## Endpoints
### Chat ($0.05) AI chat with all 19 intelligence tools. Ask any DeFi question.
```bash curl -s -X POST https://x402.silverbackdefi.app/api/v1/chat \ -H "Content-Type: application/json" \ -d '{"message": "What are the top coins right now?"}' ```
### Market Data ($0.001 each)
```bash # Top coins by market cap curl -s -X POST https://x402.silverbackdefi.app/api/v1/top-coins \ -H "Content-Type: application/json" -d '{}'
# Top liquidity pools on Base curl -s -X POST https://x402.silverbackdefi.app/api/v1/top-pools \ -H "Content-Type: application/json" -d '{}'
# Top DeFi protocols by TVL curl -s -X POST https://x402.silverbackdefi.app/api/v1/top-protocols \ -H "Content-Type: application/json" -d '{}'
# Trending tokens curl -s -X POST https://x402.silverbackdefi.app/api/v1/trending-tokens \ -H "Content-Type: application/json" -d '{}'
# Base gas prices curl -s -X POST https://x402.silverbackdefi.app/api/v1/gas-price \ -H "Content-Type: application/json" -d '{}'
# Token details curl -s -X POST https://x402.silverbackdefi.app/api/v1/token-metadata \ -H "Content-Type: application/json" -d '{"token": "ETH"}' ```
### Trading & Analysis
```bash # Swap quote with routing ($0.002) curl -s -X POST https://x402.silverbackdefi.app/api/v1/swap-quote \ -H "Content-Type: application/json" \ -d '{"fromToken": "ETH", "toToken": "USDC", "amount": "1"}'
# Technical analysis — RSI, MACD, Bollinger ($0.02) curl -s -X POST https://x402.silverbackdefi.app/api/v1/technical-analysis \ -H "Content-Type: application/json" \ -d '{"token": "ETH"}'
# Backtest a strategy ($0.10) curl -s -X POST https://x402.silverbackdefi.app/api/v1/backtest \ -H "Content-Type: application/json" \ -d '{"token": "ETH", "strategy": "rsi", "days": 30}'
# Token correlation matrix ($0.005) curl -s -X POST https://x402.silverbackdefi.app/api/v1/correlation-matrix \ -H "Content-Type: application/json" \ -d '{"tokens": ["ETH", "BTC", "VIRTUAL"]}' ```
### Yield & DeFi
```bash # Yield opportunities ($0.02) curl -s -X POST https://x402.silverbackdefi.app/api/v1/defi-yield \ -H "Content-Type: application/json" \ -d '{"token": "USDC"}'
# Pool health analysis ($0.005) curl -s -X POST https://x402.silverbackdefi.app/api/v1/pool-analysis \ -H "Content-Type: application/json" \ -d '{"pool": "ETH/USDC"}' ```
### Security & Intelligence
```bash # Token contract audit ($0.01) curl -s -X POST https://x402.silverbackdefi.app/api/v1/token-audit \ -H "Content-Type: application/json" \ -d '{"token": "0x558881c4959e9cf961a7E1815FCD6586906babd2"}'
# Whale movement tracking ($0.01) curl -s -X POST https://x402.silverbackdefi.app/api/v1/whale-moves \ -H "Content-Type: application/json" \ -d '{"token": "VIRTUAL"}'
# Arbitrage scanner ($0.005) curl -s -X POST https://x402.silverbackdefi.app/api/v1/arbitrage-scanner \ -H "Content-Type: application/json" -d '{}'
# Agent reputation — ERC-8004 ($0.001) curl -s -X POST https://x402.silverbackdefi.app/api/v1/agent-reputation \ -H "Content-Type: application/json" \ -d '{"agentId": "13026"}'
# Discover agents by capability ($0.002) curl -s -X POST https://x402.silverbackdefi.app/api/v1/agent-discover \ -H "Content-Type: application/json" \ -d '{"capability": "defi"}' ```
### Non-custodial Swap ($0.05) Returns unsigned EIP-712 Permit2 data for client-side signing.
```bash curl -s -X POST https://x402.silverbackdefi.app/api/v1/swap \ -H "Content-Type: application/json" \ -d '{"fromToken": "USDC", "toToken": "ETH", "amount": "10", "walletAddress": "0xYOUR_WALLET"}' ```
## Payment (x402 Protocol)
All endpoints return HTTP 402 with a USDC payment requirement. Your agent handles payment using `@x402/fetch` or any x402-compatible client with its own wallet.
Prices range from $0.001 to $0.10 per call. The exact amount is specified in the 402 response.
## Free Endpoints
```bash # Health check curl -s https://x402.silverbackdefi.app/api/v1/health
# Pricing info curl -s https://x402.silverbackdefi.app/api/v1/pricing
# Endpoint list curl -s https://x402.silverbackdefi.app/api/v1/endpoints ```
## MCP Server
For Claude Desktop, Cursor, or Claude Code: ```bash npm install -g silverback-x402-mcp ``` https://www.npmjs.com/package/silverback-x402-mcp
## Links
- **Website**: https://silverbackdefi.app - **x402 Docs**: https://silverbackdefi.app/x402 - **API**: https://x402.silverbackdefi.app - **Source**: https://github.com/RidingLiquid/silverback-skill