x402basequality 0.72

Track large wallet movements and whale transactions on Base via x402 micropayments.

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

What it does

The Silverback whale-moves endpoint tracks large wallet movements and whale transactions on EVM chains (defaulting to Base, chain ID 8453). It is part of the Silverback x402 DeFi Intelligence API, which provides 11 pay-per-use endpoints for DeFi analysis, execution, and market intelligence. Payment is handled via the x402 micropayment protocol using USDC on Base, Solana, or SKALE.

The whale-moves endpoint accepts POST requests with optional parameters: a token contract address, a minimum USD value threshold (default $100,000), a result limit (default 10, max 50), and a chain ID. The response includes whale transaction data with summary information, net flow analysis, and top buyers/sellers. The endpoint costs $0.02 per call, settled in USDC.

Silverback positions itself as autonomous DeFi infrastructure for the agent economy. All endpoints return JSON with a `success` boolean field. The API supports both GET (query params) and POST (JSON body) on most endpoints. A 15% discount is available when paying with the $BACK token via Permit2 on Base.

Capabilities

whale-trackingon-chain-analyticslarge-transaction-detectionnet-flow-analysisx402-micropaymentsusdc-paymentbase-chainevm-compatible

Use cases

  • —Monitor large token transfers to detect accumulation or distribution patterns
  • —Identify top buyers and sellers for a specific token on Base
  • —Analyze net flow of whale transactions to gauge market sentiment
  • —Build automated trading signals based on whale activity
  • —Integrate whale movement data into DeFi agent decision-making pipelines

Fit

Best for

  • —AI agents needing real-time whale movement intelligence via pay-per-use
  • —DeFi traders monitoring large wallet activity for trading signals
  • —On-chain analysts tracking token accumulation and distribution
  • —Developers building automated DeFi strategies that react to whale moves

Not for

  • —Historical whale data over long time periods (endpoint appears to return recent moves only)
  • —Non-EVM chains other than Base (chain ID must be specified, defaults to 8453)
  • —Free or subscription-based access — requires x402 micropayment per call

Quick start

curl -X POST https://x402.silverbackdefi.app/api/v1/whale-moves \
  -H "Content-Type: application/json" \
  -d '{"token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913", "minValueUsd": 100000, "limit": 10, "chainId": 8453}'

Example

Request

{
  "limit": 10,
  "token": "0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913",
  "chainId": 8453,
  "minValueUsd": 100000
}

Endpoint

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

Quality

0.72/ 1.00

Full OpenAPI schema with clear endpoint description, parameters, and pricing. The endpoint is live (402 challenge captured). However, no example response body is available, the docs link returns a 404, and the 402 challenge object is empty, so exact payment details (token address, amount in base units) are not directly confirmed from the probe.

Warnings

  • —Docs link (https://docs.silverbackdefi.app/) was not crawled; the /docs path on the x402 subdomain returns 404.
  • —The x402 challenge object captured is empty — payment details (accepts array) were not included in the probe.
  • —No example response schema is provided in the OpenAPI spec; response structure is inferred from the summary only.
  • —All request parameters are optional per the schema — calling with no body may return generic/default whale data.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-22 01:02:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

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