Silverback Defi

DeFi intelligence powered by Silverback — 19 x402 endpoints on Base chain. Market data, swap quotes, technical analysis, yield opportunities, token audits, whale tracking, and AI chat. Pay per call with USDC.

Security Scan

The skill is an instruction-only wrapper around a paid HTTP API for DeFi analytics and does not request unrelated credentials or install code; the requested capabilities align with its description, though you should verify the external service and be careful when signing payments or permits.

Purpose & Capability

The name/description advertise paid DeFi endpoints on the Base chain; the SKILL.md contains only curl examples calling an x402 payment endpoint and documentation for paid features. Required binaries (curl, jq) are consistent with the provided examples. No unrelated credentials, binaries, or config paths are requested.

Instruction Scope

Runtime instructions are limited to issuing HTTP POST/GET requests to the documented API host (x402.silverbackdefi.app) and installing an optional npm helper for specific clients. The instructions do not direct the agent to read local files, other env vars, or system configuration. They do instruct the user/agent to perform payments via x402 and to sign EIP-712 Permit2 data client-side — which is expected for non-custodial DeFi flows but carries the usual signing risks.

Install Mechanism

There is no install spec; the skill is instruction-only. The SKILL.md mentions an optional npm package (silverback-x402-mcp) hosted on the public npm registry, but the skill does not automatically install it. No suspicious download URLs or archive extraction are present.

Credentials

The skill declares no required environment variables or credentials. The documentation references using an x402 client and a wallet for payments/signing, but this is an expected operational requirement for pay-per-call DeFi operations rather than the skill requesting secrets itself. There is no unexplained request for unrelated secrets or system credentials.

Persistence & Privilege

The skill is user-invocable and sets disable-model-invocation: true (the agent is prevented from autonomously calling it), and always is false. It does not request persistent presence or system-level modifications.

Assessment

This skill is coherent with its stated purpose (paid DeFi endpoints). Before installing or using it: 1) Verify the service identity — check the homepage and the linked GitHub repo for matching source code and recent commits. 2) Use the provided free endpoints (health/pricing/endpoints) first to confirm the service behavior. 3) Never paste or import private keys into the skill; when asked to sign Permit2 or payment transactions, review the unsigned payload carefully and use a non-custodial wallet you control. 4) If you plan to use the optional npm MCP helper, inspect its package source on npm/GitHub before installing. 5) Because this contacts an external domain and requires on-chain signing to complete requests, treat payments and signed permits with the usual DeFi caution. If you want a stronger assurance level, obtain the upstream source code and verify the API and npm package before trusting it with real funds.

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.

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)

# 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

# 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

# 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

# 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.

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

# 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:

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