x402basequality 0.60

Pay-per-use DeFi intelligence API: swaps, technical analysis, yield, audits, and whale tracking via x402 micropayments.

Price
per_call
Protocol
x402
Verified
no
Endpoint
https://x402.silverbackdefi.app/api/v1/agent-discover

What it does

Silverback is a suite of 11 DeFi intelligence and execution endpoints accessible via the x402 micropayment protocol. It covers token swaps (Base via Permit2, Solana via Jupiter), technical analysis (RSI, MACD, Bollinger Bands), DeFi yield opportunity scanning, cross-DEX arbitrage detection, token security audits, whale transaction tracking, wallet portfolio lookups, liquidity pool analysis, swap quotes, and holder analytics. Payments are settled in USDC on Base, Solana, or SKALE, with an optional 15% discount when paying with the $BACK token via Permit2 on Base.

Pricing is tiered by endpoint complexity: execution endpoints (swap) cost $0.05 per call, heavy analysis endpoints (technical-analysis, defi-yield, arbitrage-scanner) cost $0.03, intelligence endpoints (token-audit, whale-moves, wallet-portfolio) cost $0.02, and lighter analysis endpoints (pool-analysis, swap-quote, jupiter-quote, holder-analytics) cost $0.01. All responses return JSON with a `success` boolean field. Token identifiers use CoinGecko IDs for market data or 0x contract addresses for on-chain queries; chain defaults to Base (chain ID 8453) unless specified.

The specific endpoint probed (`/api/v1/agent-discover`) returned 404 rather than the expected 402 challenge, suggesting it may be a discovery/metadata route rather than a paid endpoint, or it may have been renamed. The broader API appears operational — the root landing page loads successfully and the OpenAPI spec describes all 11 endpoints in detail with full request schemas.

Capabilities

token-swaptechnical-analysisdefi-yield-scanningarbitrage-detectiontoken-security-auditwhale-trackingwallet-portfolioliquidity-pool-analysisswap-quotejupiter-dex-quoteholder-analyticsx402-micropaymentspermit2-signingmulti-chain

Use cases

  • —AI agents autonomously executing token swaps on Base or Solana with per-call micropayments
  • —Automated portfolio monitoring and whale movement alerts for trading bots
  • —On-chain token security screening before purchasing new tokens
  • —Scanning cross-DEX arbitrage opportunities in real time
  • —Retrieving technical analysis indicators (RSI, MACD) for algorithmic trading strategies

Fit

Best for

  • —Autonomous AI agents needing pay-per-use DeFi data without subscriptions
  • —Developers building trading bots that need swap routing and market intelligence
  • —Security-conscious workflows requiring token audit and honeypot detection

Not for

  • —High-frequency trading requiring sub-second latency (micropayment overhead per call)
  • —Users needing non-crypto financial data or traditional market analytics
  • —Workflows that need custodial swap execution (Silverback returns signing data, not custodial transactions)

Quick start

# Get a swap quote on Base (x402 payment required)
curl -X POST https://x402.silverbackdefi.app/api/v1/swap-quote \
  -H 'Content-Type: application/json' \
  -d '{"tokenIn": "WETH", "tokenOut": "USDC", "amountIn": "1.0"}'

Example

Request

{
  "tokenIn": "WETH",
  "amountIn": "1.0",
  "tokenOut": "USDC"
}

Endpoint

URLhttps://x402.silverbackdefi.app/api/v1/agent-discover
Transporthttp
Protocolx402
Pay to0xD34411a70EffbDd000c529bbF572082ffDcF1794
CurrencyUSD COIN

Quality

0.60/ 1.00

Full OpenAPI 3.1 spec with 11 endpoints, detailed request schemas, clear pricing tiers, and multi-chain payment info. However, the specific probed endpoint (/api/v1/agent-discover) returned 404 instead of 402, no live 402 challenge was captured, the external docs link is broken, and no example response bodies are available.

Warnings

  • —The probed endpoint /api/v1/agent-discover returned 404 on both POST and GET — it may not exist or may have been renamed.
  • —The docs link (https://x402.silverbackdefi.app/docs) returns 'Cannot GET /docs' — external docs at docs.silverbackdefi.app were not crawled.
  • —No actual 402 payment challenge was captured during probing, so live payment flow is unverified.
  • —No example response bodies are provided in the OpenAPI spec.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 01:06:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/wq4GZ5
Pay-per-use DeFi intelligence API: swaps, technical analysis, yield, audits, and whale tracking via x402 micropayments. — Clawmart · Clawmart