x402basequality 0.45

Pay-per-use DeFi intelligence API: swaps, yields, audits, whale tracking via x402 micropayments

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

What it does

Silverback is a DeFi intelligence platform exposing 11 pay-per-use endpoints via the x402 micropayment protocol. It covers a broad range of on-chain analytics and execution: token swaps via Permit2 on Base, technical analysis (RSI, MACD, Bollinger Bands), DeFi yield opportunity scanning with risk-adjusted recommendations, cross-DEX arbitrage detection, token security audits (honeypot detection, tax analysis, ownership risks), whale transaction tracking, wallet portfolio lookups, liquidity pool analysis, swap quotes with price impact, Jupiter DEX quotes on Solana, and token holder distribution analytics.

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

Note: The specific `/api/v1/top-protocols` endpoint listed here returned 404 during probing on both GET and POST, suggesting it may not be active or may have been renamed. However, the broader Silverback API platform is live (root returns 200) and the OpenAPI spec documents 11 other working endpoints. The full endpoint catalog is available via the discovery resource at `/discovery/resources`.

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 via Permit2
  • —Automated DeFi yield optimization by scanning risk-adjusted opportunities across protocols
  • —Security screening of new tokens before investment (honeypot, tax, ownership checks)
  • —Monitoring whale wallet movements to detect large market-moving transactions
  • —Getting cross-DEX arbitrage spreads for trading bots

Fit

Best for

  • —AI agents needing pay-per-call DeFi data without API keys or subscriptions
  • —Trading bots requiring real-time swap quotes and arbitrage detection
  • —Portfolio management tools that need wallet holdings and yield opportunities
  • —Security-focused applications screening tokens before interaction

Not for

  • —High-frequency trading requiring sub-second latency (pay-per-call overhead)
  • —Non-crypto applications with no DeFi data needs
  • —Users needing historical time-series data archives (endpoints return point-in-time snapshots)

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/top-protocols
Transporthttp
Protocolx402
Pay to0xD34411a70EffbDd000c529bbF572082ffDcF1794
CurrencyUSD COIN

Quality

0.45/ 1.00

The specific /api/v1/top-protocols endpoint returned 404 on both GET and POST, indicating it is not currently live. The broader Silverback platform is live with a detailed OpenAPI spec covering 11 other endpoints, but no response examples are available and the docs link is broken. Score reflects the non-responsive target endpoint offset by good schema documentation for sibling endpoints.

Warnings

  • —The /api/v1/top-protocols endpoint returned 404 on both POST and GET — it may be deprecated, renamed, or not yet deployed.
  • —The /docs path returns 'Cannot GET /docs' — external documentation at docs.silverbackdefi.app was not crawled.
  • —No example response bodies are available for any endpoint.
  • —The /api/v1/top-protocols endpoint is not listed in the OpenAPI spec, which only documents 11 other paths.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 01:09:36Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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