{"uid":"cap_kg_Ydm_MhVAorui1DW0mo","slug":"saylor-innovations-data-desk-evm-multi-chain-activity-map-2f942ec9","name":"Saylor Innovations Data Desk – EVM Multi-Chain Activity Map","description":"Where a wallet is active: native balance, transaction count and contract flag on all 16 EVM chains in one call, with the most active chain.","url":"https://saylorinnovations.com/api/chain/activity-map?utm_source=zero.xyz","method":"GET","headers":{},"bodySchema":{"type":"object","$schema":"https://json-schema.org/draft/2020-12/schema","required":["input"],"properties":{"input":{"type":"object","required":["type","method"],"properties":{"type":{"type":"string","const":"http"},"method":{"enum":["GET"],"type":"string"},"queryParams":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"the wallet or contract address to look up on every chain"}}}},"additionalProperties":false},"output":{"type":"object","required":["type"],"properties":{"type":{"type":"string","const":"json"},"example":{"type":"object","required":["address","chains_queried","chains_answered","chains_active","results","note","source"],"properties":{"note":{"type":"string","description":"plain-language reading of the result"},"source":{"type":"string","description":"where the data was read from or how it was computed"},"address":{"type":"string","description":"the address queried"},"results":{"type":["array","null"],"items":{"type":"object","properties":{"ms":{"type":["number","null"],"description":"time taken for that chain"},"ok":{"type":["boolean","null"],"description":"false when the chain did not answer"},"chain":{"type":["string","null"],"description":"chain name"},"active":{"type":["boolean","null"],"description":"true when balance or nonce is above zero"},"tx_count":{"type":["number","null"],"description":"outgoing transactions (nonce)"},"is_contract":{"type":["boolean","null"],"description":"true when the address is a contract there"},"native_symbol":{"type":["string","null"],"description":"native currency"},"native_balance":{"type":["number","null"],"description":"native balance"}}},"description":"one entry per chain"},"elapsed_ms":{"type":"number","description":"total time for all chains"},"active_chains":{"type":["array","null"],"description":"names of those chains"},"chains_active":{"type":"number","description":"chains where it has a balance or has sent transactions"},"chains_queried":{"type":"number","description":"chains asked"},"chains_answered":{"type":"number","description":"chains that answered"},"most_active_chain":{"type":["string","null"],"description":"chain with the most outgoing transactions"},"total_transactions_sent":{"type":"number","description":"sum of outgoing transactions over answering chains"}}}}}}},"responseSchema":null,"example":null,"exampleRequest":null,"tags":["x402"],"displayCostAmount":"0.01","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":"$0.01/call","primary":{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"},"accepted":[{"kind":"static","protocol":"x402","network":"base","amountUsd":"0.01","per":"call","confidence":"exact"}]},"paymentMethods":[{"uid":"pm_WIWrp87M6ErND926KMSB-","protocol":"x402","methodType":"crypto","chain":"base","mode":"charge","costAmount":"0.01","costPer":"request","priority":0,"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","unit":"request","depositMicros":null,"planRef":null}],"brandName":null,"brandSlug":null,"brandBaseUrl":null,"brandDocsUrl":null,"whatItDoes":"Returns native balance, transaction count, and contract flag for a wallet or contract address across 16 EVM chains in a single call, identifying which chains are active.","exampleAgentPrompt":"Can you check which of the 16 EVM chains the wallet 0x742d35Cc6634C0532925a3b8D4C9C0F8f89c2Ad7 is active on — show me the native balance, transaction count, and whether it's a contract on each chain?","exampleUseCases":[{"title":"Cross-chain wallet due diligence","prompt":"I need to verify if the address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 has any activity on any EVM chains — can you check all 16 chains and tell me the native balances, transaction counts, and which chain it's most active on?"},{"title":"Detecting contract vs EOA across chains","prompt":"Is 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D a smart contract on any of the major EVM chains, or just a regular wallet? Please scan all 16 chains."},{"title":"Airdrop eligibility multi-chain scan","prompt":"Before we finalize the airdrop list, can you check if 0xAbCd1234567890EFabcd1234567890efABCD1234 has sent any transactions or holds any native balance on each of the 16 supported EVM chains?"}],"resultDescription":"A JSON object containing the queried address, total chains queried and answered, number of active chains, a per-chain array with chain name, native symbol, native balance, outgoing transaction count (nonce), contract flag, response time, and a success flag — plus a plain-language summary note identifying the most active chain and data source.","failureModes":["Invalid or malformed address returns an error or null results","Chain RPC node timeout causes ok=false for that chain entry","Address with zero activity on all chains returns chains_active=0 and empty active_chains array","Rate limiting or payment failure returns HTTP 402 or 429","Truncated response if chain query time exceeds service timeout"],"whenToPreferThis":"Choose this endpoint when you need a single-call snapshot of an address's presence across all 16 major EVM chains simultaneously, rather than querying each chain's RPC individually. Ideal for wallet profiling, airdrop verification, cross-chain due diligence, or any workflow where you need to know which chains an address is live on without managing multiple provider connections.","instructions":null,"reviewSummary":null,"reviewSummaryHighlights":null,"reviewSummaryConcerns":null,"reviewSummaryGeneratedAt":null,"activationCount":0,"lastUsedAt":null,"lastSuccessfullyRanAt":null,"lastHealthCheckAt":"2026-10-27T13:03:57.345Z","isFirstParty":false,"canonicalSlug":"saylor-innovations-data-desk-evm-multi-chain-activity-map-2f942ec9"}