x402basequality 0.30

Pay-per-use DeFi intelligence and execution via x402 micropayments on Base, Solana, and SKALE.

Price
per_call
Protocol
x402
Verified
no
Endpoint
https://silverback-x402.onrender.com/api/v1/agent-reputation

What it does

Silverback is an autonomous DeFi infrastructure API designed for the agent economy. It exposes 11 pay-per-use endpoints covering swap execution, technical analysis, DeFi yield intelligence, arbitrage scanning, token security audits, whale tracking, wallet portfolio lookups, liquidity pool analysis, swap quotes (Base and Solana via Jupiter), and token holder analytics. All endpoints use the x402 micropayment protocol, accepting USDC on Base, Solana, and SKALE (with a 15% discount available when paying with the $BACK token via Permit2 on Base).

The specific endpoint listed here — `/api/v1/agent-reputation` — is NOT documented in the OpenAPI spec, which covers 11 other paths. Probing this endpoint returned 404 on both GET and POST, meaning it is either deprecated, not yet deployed, or unlisted. The broader Silverback API platform is live (root returns 200, OpenAPI spec is well-structured), but this particular path cannot be confirmed as functional.

Pricing across the documented Silverback endpoints ranges from $0.01 (pool analysis, swap quotes, holder analytics) to $0.05 (swap execution). Payments settle in USDC. All responses return JSON with a `success` boolean field. Token identifiers use CoinGecko IDs for market data or 0x contract addresses for on-chain operations, defaulting to Base (chain ID 8453) unless otherwise specified.

Capabilities

defi-intelligencetoken-swaptechnical-analysisyield-optimizationarbitrage-scanningtoken-security-auditwhale-trackingwallet-portfolioliquidity-pool-analysisswap-quotejupiter-dex-quoteholder-analyticsx402-micropaymentserc-8004-identity

Use cases

  • —Autonomous agents performing DeFi trades and portfolio rebalancing on Base
  • —Security-checking tokens before purchase via honeypot and ownership risk audits
  • —Monitoring whale wallet movements to detect large market-moving transactions
  • —Scanning cross-DEX arbitrage opportunities with spread analysis
  • —Getting Jupiter DEX swap quotes on Solana for routing optimization

Fit

Best for

  • —AI agents needing pay-per-call DeFi data without subscriptions
  • —Developers building autonomous trading or portfolio management bots
  • —On-chain analysts who want programmatic access to whale and holder data

Not for

  • —Users needing historical time-series data or charting (this is point-in-time intelligence)
  • —Applications requiring free or subscription-based pricing models
  • —Non-crypto use cases with no DeFi component

Quick start

# Get a swap quote on Base (requires x402 payment)
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://silverback-x402.onrender.com/api/v1/agent-reputation
Transporthttp
Protocolx402
Pay to0xD34411a70EffbDd000c529bbF572082ffDcF1794
CurrencyUSD COIN

Quality

0.30/ 1.00

The specific endpoint `/api/v1/agent-reputation` returned 404 on both GET and POST and is not documented in the OpenAPI spec. The broader Silverback platform is live and well-documented with 11 other endpoints, but this particular path appears non-functional or unlisted. Score reflects the endpoint-specific unavailability despite good surrounding documentation.

Warnings

  • —The /api/v1/agent-reputation endpoint returned 404 on both GET and POST — it is not live or not publicly accessible.
  • —This endpoint is absent from the OpenAPI specification which documents 11 other paths.
  • —The docs link (https://docs.silverbackdefi.app/) was not crawled; external documentation status is unknown.
  • —The OpenAPI server URL (https://x402.silverbackdefi.app) differs from the probed origin (https://silverback-x402.onrender.com) — the endpoint may only be live at the canonical server URL.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:53:18Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/FW7fEg