x402basequality 0.25

Pay-per-use correlation matrix endpoint for DeFi token analysis via x402 micropayments

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

What it does

Silverback is a suite of DeFi intelligence APIs accessible via the x402 micropayment protocol. The correlation-matrix endpoint is part of the Silverback x402 API (v3.0.0), which advertises 11 pay-per-use endpoints covering swap execution, technical analysis, yield intelligence, arbitrage scanning, token audits, whale tracking, wallet portfolios, pool analysis, swap quotes, Jupiter DEX quotes, and holder analytics. Payments settle in USDC on Base, Solana, or SKALE networks, with an optional 15% discount when paying with the $BACK token via Permit2 on Base.

The correlation-matrix endpoint itself is NOT documented in the published OpenAPI spec, and probing it at the listed URL (silverback-x402.onrender.com) returned 404 on both GET and POST. The OpenAPI spec's server URL points to a different host (x402.silverbackdefi.app), so the endpoint may be live there but was not confirmed during probing. Without schema documentation or a successful 402 challenge, the exact request format, pricing, and response structure for this specific endpoint are unknown.

The broader Silverback API uses fixed per-call pricing ranging from $0.01 (analysis tier) to $0.05 (execution tier). All responses include a `success` boolean field. Token identifiers use CoinGecko IDs for market data or 0x contract addresses for on-chain endpoints. The API defaults to Base (chain ID 8453) unless otherwise specified.

Capabilities

correlation-matrixdefi-intelligencex402-micropaymentsusdc-paymentsbase-chainsolana-chainskale-chainpay-per-usetoken-analysis

Use cases

  • —Analyzing price correlations between DeFi tokens for portfolio diversification
  • —Identifying correlated asset pairs to inform trading strategies
  • —Building automated portfolio rebalancing agents that factor in cross-asset correlations
  • —Risk assessment by detecting highly correlated holdings in a DeFi portfolio

Fit

Best for

  • —AI agents needing on-demand DeFi correlation data via micropayments
  • —Automated trading systems that require cross-token correlation metrics
  • —Portfolio management tools analyzing asset interdependencies

Not for

  • —Users needing free or subscription-based API access without crypto payments
  • —Traditional equity or forex correlation analysis outside the crypto/DeFi space
  • —Real-time streaming correlation data (this is a per-call REST endpoint)

Quick start

# The correlation-matrix endpoint is undocumented; inferred usage:
curl -X POST https://x402.silverbackdefi.app/api/v1/correlation-matrix \
  -H "Content-Type: application/json" \
  -d '{"tokens": ["bitcoin", "ethereum", "solana"]}'

Example

Request

{
  "tokens": [
    "bitcoin",
    "ethereum",
    "solana"
  ]
}

Endpoint

URLhttps://silverback-x402.onrender.com/api/v1/correlation-matrix
Transporthttp
Protocolx402
Pay to0xD34411a70EffbDd000c529bbF572082ffDcF1794
CurrencyUSD COIN

Quality

0.25/ 1.00

The correlation-matrix endpoint returned 404 on both GET and POST at the probed URL, is absent from the published OpenAPI spec, and has no documented schema, pricing, or example responses. The endpoint may exist at the canonical server (x402.silverbackdefi.app) but this was not confirmed. Effectively a stub listing.

Warnings

  • —Endpoint returned 404 on both POST and GET at silverback-x402.onrender.com — not confirmed live
  • —correlation-matrix is NOT listed in the published OpenAPI spec; schema, pricing, and response format are unknown
  • —OpenAPI spec server URL (x402.silverbackdefi.app) differs from the probed origin (silverback-x402.onrender.com) — endpoint may only be live at the canonical host
  • —Request and response examples are speculative and should not be relied upon
  • —Docs link at /docs returned 'Cannot GET /docs'

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 00:55:40Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/9A69zg
Pay-per-use correlation matrix endpoint for DeFi token analysis via x402 micropayments — Clawmart · Clawmart