{"uid":"cap_fR8yXDeveZzENcs6VeXW2","slug":"cortex-cloud-transaction-history-9c5334ca","name":"Cortex Cloud Transaction History","description":"One pay-per-call API for AI agents: optimization, AI, research, on-chain data, and automation — all settled in USDC on Base via x402. Discover via MCP and Bazaar, estimate free, pay per call. No API keys, no signup.","url":"https://api.cortexcloud.org/v1/data/tx-history","method":"GET","headers":{},"bodySchema":{"type":"object","properties":{"chain":{"type":"string","default":"ethereum"},"limit":{"type":"integer","default":25,"maximum":100,"minimum":1},"address":{"type":"string","pattern":"^0x[0-9a-fA-F]{40}$"},"from_block":{"type":"integer"}}},"responseSchema":{"type":"object","format":"application/json","example":{}},"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.004","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":"$0.004/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.004","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_dszXznTTffAME6tqvmAib","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.004","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns normalized, paginated transaction history for a given blockchain address using Alchemy Transfers API, paid per call in USDC via x402.","exampleAgentPrompt":"Pull the last 50 normalized transactions for Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 — I want to see its full transfer history.","exampleUseCases":[{"title":"Audit wallet spending activity","prompt":"Can you fetch the last 100 transactions for the Ethereum address 0xAbCd1234...5678 so I can audit its recent on-chain spending?"},{"title":"Portfolio tracker transaction sync","prompt":"Get me the normalized transfer history for wallet 0x71C7656EC7ab88b098defB751B7401B5f6d8976F on Ethereum, starting from block 18000000, up to 50 results."},{"title":"Detect incoming transfers from a block","prompt":"I need to see all transfers into address 0x3f5CE5FBFe3E9af3971dD833D26bA9b5C936f0bE on Ethereum from block 19500000 onward — show me up to 25 results."}],"resultDescription":"A list of normalized transaction/transfer records for the specified address, including sender, receiver, token, amount, block number, and transaction hash, paginated up to the requested limit.","failureModes":["Invalid Ethereum address format (must match ^0x[0-9a-fA-F]{40}$) returns a 400 error","Unsupported chain value may return an empty result or 400","limit out of range (must be 1-100) returns validation error","Payment failure or insufficient USDC balance causes a 402 response","Alchemy upstream timeout or rate limit may cause 503 or delayed response","from_block set beyond current chain head may return empty results"],"whenToPreferThis":"Choose this endpoint when you need normalized, structured transaction history for a specific Ethereum-compatible wallet address without managing Alchemy API keys, paying only per call in USDC via x402. It is ideal for agents that need to audit wallets, sync portfolio data, or detect transfers from a given block onward without maintaining persistent subscriptions or API credentials.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-09-15T12:51:19.721Z","isFirstParty":false}