x402basequality 0.45

Pay-per-use DeFi intelligence API: swap quotes, yield analysis, whale tracking, and more via x402 micropayments.

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

What it does

Silverback is a DeFi intelligence API suite offering 11 pay-per-use endpoints accessible via the x402 micropayment protocol. It covers a broad range of DeFi operations and analytics on Base and Solana, including token swaps (via Permit2), swap quotes, Jupiter DEX quotes (Solana), technical analysis (RSI, MACD, Bollinger Bands), DeFi yield opportunities, cross-DEX arbitrage scanning, token security audits, whale transaction tracking, wallet portfolio lookups, liquidity pool analysis, and token holder analytics.

Payments are settled in USDC on Base, Solana, or SKALE (zero gas). Pricing ranges from $0.01 per call for lighter analytics (pool analysis, swap quotes, holder analytics) up to $0.05 for execution endpoints (swap). A 15% discount is available when paying with the $BACK token via Permit2 on Base. All responses return JSON with a `success` boolean field. Token identifiers use CoinGecko IDs for market data or 0x contract addresses for on-chain endpoints, with Base (chain ID 8453) as the default chain.

Note: The specific `/api/v1/dex-metrics` endpoint listed here returned 404 on both GET and POST during probing, suggesting it may not be a currently active endpoint or may have been renamed/removed. However, the broader Silverback API platform is live (root returns 200) and the OpenAPI spec documents 11 other working endpoints. The external docs link (docs.silverbackdefi.app) was not reachable during crawl.

Capabilities

token-swapswap-quotetechnical-analysisdefi-yieldarbitrage-scanningtoken-auditwhale-trackingwallet-portfoliopool-analysisholder-analyticsjupiter-dex-quotex402-micropaymentspermit2-signing

Use cases

  • —AI agents autonomously executing or quoting token swaps on Base or Solana
  • —Automated DeFi yield scanning with risk-adjusted portfolio allocation recommendations
  • —Monitoring whale wallet movements and large transactions for trading signals
  • —Running security audits on tokens before investing (honeypot detection, tax analysis)
  • —Analyzing liquidity pool health, TVL, and APR for LP decision-making

Fit

Best for

  • —Autonomous DeFi agents that need pay-per-call intelligence without subscriptions
  • —Developers building trading bots on Base or Solana
  • —Portfolio analysis tools needing on-chain wallet and token data
  • —Security-conscious traders wanting automated token audits

Not for

  • —High-frequency trading requiring sub-second latency (micropayment overhead per call)
  • —Non-crypto or traditional finance data needs
  • —Users who need free or subscription-based access without per-call payments

Quick start

# 1. Send request, receive 402 with payment challenge
curl -X POST https://x402.silverbackdefi.app/api/v1/swap-quote \
  -H 'Content-Type: application/json' \
  -d '{"tokenIn": "WETH", "tokenOut": "USDC", "amountIn": "1.0"}'

# 2. Sign USDC payment via x402 protocol, then resend with payment proof header

Example

Request

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

Endpoint

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

Quality

0.45/ 1.00

The specific /api/v1/dex-metrics endpoint returned 404 on both GET and POST, indicating it is not currently live or has been renamed. The broader Silverback platform is live with a detailed OpenAPI spec covering 11 other endpoints, but the external docs link failed and no example responses are available. Scoring reflects the non-responsive target endpoint despite good surrounding documentation.

Warnings

  • —The /api/v1/dex-metrics endpoint returned 404 on both POST and GET — it may have been removed, renamed, or is not a valid endpoint.
  • —The /api/v1/dex-metrics path is NOT listed in the OpenAPI spec; the spec documents 11 other endpoints but not this one.
  • —External docs at docs.silverbackdefi.app were not reachable during crawl.
  • —No example response data available for any endpoint.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 01:03:59Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/B9yHx8