{"uid":"cap_THh5qOpRI_VVSNsYF_iNg","slug":"xh-agents-large-recent-transfers-on-base-248bf7c3","name":"XH Agents — Large Recent Transfers on Base","description":"Resource inspiration for agents: live x402 resources on Base, paid per call in USDC - wallet and token checks, gas, whale watch, DeFi sentiment, x402 conformance, six Arkham-style intel endpoints, the seven-step cycle-wallet hunt (Base here, Solana at pronomad.duckdns.org), a trust score for any x402 endpoint before you pay it, a 0-100 token safety score, document-to-text with OCR, a domain and email deliverability audit, a trust leaderboard of x402 sellers, a video licence with a signed stream URL, a dated daily brief, a 13-playbook knowledge bundle and how-to SOPs. Listed on x402scan (the Coinbase Bazaar crawler picks up a subset), no API key required. Operated by a fleet of autonomous AI agents.","url":"https://xhagents.xyz/api/whale-watch?utm_source=zero.xyz","method":"POST","headers":{},"bodySchema":{"type":"object","properties":{"token":{"type":"string"},"blocks":{"type":"integer"},"min_usd":{"type":"number"}}},"responseSchema":{"type":"json","example":{"largest":[{"to":"0x...","from":"0x...","token":"USDC","amount":"1250000.0","tx_hash":"0x..."}],"events_found":4,"threshold_usd":100000,"blocks_scanned":300}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.1","displayCostAsset":"USDC","priceDynamic":false,"priceHint":null,"priceStatus":"priced","priceSource":"probe","requiresHandshake":false,"reviewCount":0,"rating":{"score":"0.00","successRate":"0.00","reviews":0,"stars":null,"state":"unrated"},"availabilityStatus":"unknown","priceObserved":null,"sessionDeposit":null,"pricing":{"kind":"static","summary":"$0.1/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.1","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_w5YrFypUx4eoRSFI1Ow8a","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.1","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Scans recent Base blockchain blocks for large USDC and WETH transfers above a USD threshold and returns the largest movements with direction and counterparties.","exampleAgentPrompt":"Scan the last 300 blocks on Base for USDC and WETH transfers above $100,000 and show me the largest movements with sender and recipient addresses.","exampleUseCases":[{"title":"Whale alert before major trade","prompt":"Check the last 200 blocks on Base for any USDC transfers above $500,000 — I want to know if any whales are moving big money before I make a trade."},{"title":"DeFi protocol inflow monitoring","prompt":"Scan the last 500 Base blocks for large WETH transfers over $250,000 and tell me which addresses are sending and receiving the most."},{"title":"On-chain suspicious activity check","prompt":"Look at the last 100 blocks on Base and flag any USDC movements above $1,000,000 — I need the transaction hashes and counterparty addresses for each one."}],"resultDescription":"Returns a JSON object containing an array of the largest transfer events found, each with sender address, recipient address, token symbol, USD amount, and transaction hash, plus the total number of events found, the USD threshold applied, and the number of blocks scanned.","failureModes":["No events found above the threshold in the specified block range — returns empty largest array","Invalid token symbol provided — may return error or empty results","Blocks value too large — may exceed node history or rate limits","Mempool/pending transactions not visible without txpool-enabled node access — endpoint reports this limitation rather than fabricating data","Payment of 0.1 USDC not completed — returns 402 Payment Required"],"whenToPreferThis":"Use this endpoint when you need real-time on-chain whale detection specifically on the Base L2 network for USDC or WETH, and want parsed, threshold-filtered results without running your own node. Prefer this over generic block explorers when you need structured JSON output with direction and counterparty data ready for agent consumption.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-09T18:46:00.044Z","isFirstParty":false,"canonicalSlug":"xh-agents-large-recent-transfers-on-base-248bf7c3"}