{"id":"7630283d-eeb3-461a-b557-1b9ed747ba9d","shortId":"25KjuZ","kind":"x402","title":"Nansen address counterparties: top transaction partners, volume, and flow analysis for any wallet via x402","tagline":"Nansen address counterparties: top transaction partners, volume, and flow analysis for any wallet via x402","description":"The Nansen Profiler Address Counterparties endpoint returns the top counterparties that a given wallet address or entity has interacted with on-chain. It supports grouping by wallet or entity and filtering by source type (Combined, Tokens, ETH). The response includes interaction statistics such as transaction count, total volume in USD, inflow/outflow breakdowns, timing data, and token details per counterparty. Smart money label filtering (include/exclude) is available, along with premium label support.\n\nThis endpoint is part of the broader Nansen API v1, which provides blockchain analytics across 25+ chains including Ethereum, Solana, Base, Arbitrum, and others. The counterparties endpoint specifically requires a chain parameter and a date range. It accepts POST requests with a JSON body. Payment is handled via the x402 protocol at $0.05 per call (fixed pricing). The API also supports traditional API key authentication with a credit-based system (50 credits on free tier, 5 on pro).\n\nResults are paginated (up to 1000 per page) and sortable by interaction_count, total_volume_usd, last_interaction_date, volume_in_usd, or volume_out_usd. High-volume addresses are limited to 180-day lookback windows. The endpoint returns labeled counterparty addresses with Nansen's proprietary labeling system.","tags":[],"capabilities":["wallet-counterparty-analysis","on-chain-interaction-stats","volume-inflow-outflow","smart-money-label-filtering","multi-chain-support","entity-grouping","paginated-results","x402-payment"],"categories":["blockchain-analytics","wallet-profiling"],"synonyms":["wallet counterparties","address interactions","transaction partners","on-chain relationships","wallet profiler","nansen profiler","address flow analysis","counterparty volume"],"warnings":["No dedicated documentation pages were reachable (all returned 'no Route matched'); schema is the sole source of endpoint details.","Response example is inferred from the OpenAPI schema, not captured from a live call."],"endpointUrl":"https://api.nansen.ai/api/v1/profiler/address/counterparties","protocol":"x402","transport":"http","auth":{"type":"x402","details":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x93053f1e7A5eFEDa532Fe69CbbE43cBEc3A0F13f","amount":"50000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"},"payTo":"J7ZvJEspvwP1oRxQZ7mYmNmT22NTm3GWq3t7HEbvPZYx","amount":"50000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}]},"qualityScore":"0.880","qualityRationale":"Full OpenAPI 3.1 schema with detailed request/response models, clear pricing ($0.05/call via x402), and a confirmed live 402 challenge. The endpoint description is thorough with filter options and sort fields. Minor deduction because no example response was directly captured from the probe (only schema-inferred), and crawled docs pages returned 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'1000':187 '180':215 '25':118 '5':179 '50':174 'accept':140 'across':117 'address':2,17,34,45,211,224 'address flow analysis' 'address interactions' 'along':98 'also':162 'analysi':10,25 'analyt':116 'api':111,161,165 'arbitrum':124 'authent':167 'avail':97 'base':123,172 'blockchain':115 'bodi':146 'breakdown':83 'broader':109 'call':157 'chain':53,119,133 'combin':66 'count':77,194 'counterparti':3,18,35,40,90,128,223 'counterparty volume' 'credit':171,175 'credit-bas':170 'data':85 'date':137,200 'day':216 'detail':88 'endpoint':36,104,129,220 'entiti':47,60 'entity-grouping' 'eth':68 'ethereum':121 'filter':62,94 'fix':158 'flow':9,24 'free':177 'given':43 'group':56 'handl':149 'high':209 'high-volum':208 'includ':71,120 'include/exclude':95 'inflow/outflow':82 'interact':49,72,193,199 'json':145 'key':166 'label':93,101,222,229 'last':198 'limit':213 'lookback':217 'money':92 'multi-chain-support' 'nansen':1,16,32,110,226 'nansen profiler' 'on-chain':51 'on-chain relationships' 'on-chain-interaction-stats' 'other':126 'page':189 'pagin':184 'paginated-results' 'paramet':134 'part':106 'partner':6,21 'payment':147 'per':89,156,188 'post':141 'premium':100 'price':159 'pro':181 'profil':33 'proprietari':228 'protocol':153 'provid':114 'rang':138 'request':142 'requir':131 'respons':70 'result':182 'return':37,221 'smart':91 'smart-money-label-filtering' 'solana':122 'sortabl':191 'sourc':64 'specif':130 'statist':73 'support':55,102,163 'system':173,230 'tier':178 'time':84 'token':67,87 'top':4,19,39 'total':78,195 'tradit':164 'transact':5,20,76 'transaction partners' 'type':65 'usd':81,197,203,207 'v1':112 'via':14,29,150 'volum':7,22,79,196,201,205,210 'volume-inflow-outflow' 'wallet':13,28,44,58 'wallet counterparties' 'wallet profiler' 'wallet-counterparty-analysis' 'window':218 'x402':15,30,152 'x402-payment'","prices":[{"id":"fb8d4bfe-2ccc-4923-bb34-cdbf31923200","listingId":"7630283d-eeb3-461a-b557-1b9ed747ba9d","amountUsd":null,"unit":"per_call","nativeCurrency":"USD COIN","nativeAmount":null,"chain":"base","payTo":"0x93053f1e7A5eFEDa532Fe69CbbE43cBEc3A0F13f","paymentMethod":"x402-usd coin","isPrimary":true,"details":{"scheme":"exact","accepts_all":[{"asset":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","extra":{"name":"USD Coin","version":"2"},"payTo":"0x93053f1e7A5eFEDa532Fe69CbbE43cBEc3A0F13f","amount":"50000","scheme":"exact","network":"eip155:8453","maxTimeoutSeconds":300},{"asset":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","extra":{"feePayer":"2wKupLR9q6wXYppw8Gr2NvWxKBUqm4PPJKkQfoxHDBg4"},"payTo":"J7ZvJEspvwP1oRxQZ7mYmNmT22NTm3GWq3t7HEbvPZYx","amount":"50000","scheme":"exact","network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","maxTimeoutSeconds":300}],"asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","max_timeout_seconds":300},"createdAt":"2026-04-21T18:32:35.368Z"}],"sources":[{"listingId":"7630283d-eeb3-461a-b557-1b9ed747ba9d","source":"x402_bazaar","sourceId":"https://api.nansen.ai/api/v1/profiler/address/counterparties","sourceUrl":"https://api.cdp.coinbase.com/platform/v2/x402/discovery/resources","isPrimary":true,"firstSeenAt":"2026-04-21T18:32:35.368Z","lastSeenAt":"2026-04-22T05:32:27.293Z"}],"details":{"listingId":"7630283d-eeb3-461a-b557-1b9ed747ba9d","quickStartSnippet":"curl -X POST https://api.nansen.ai/api/v1/profiler/address/counterparties \\\n  -H 'Content-Type: application/json' \\\n  -H 'X-Payment: <x402_payment_header>' \\\n  -d '{\n    \"address\": \"0x28c6c06298d514db089934071355e5743bf21d60\",\n    \"chain\": \"ethereum\",\n    \"date\": {\"from\": \"2025-05-01T00:00:00Z\", \"to\": \"2025-05-03T23:59:59Z\"},\n    \"pagination\": {\"page\": 1, \"per_page\": 10}\n  }'","exampleRequest":{"date":{"to":"2025-05-03T23:59:59Z","from":"2025-05-01T00:00:00Z"},"chain":"ethereum","address":"0x28c6c06298d514db089934071355e5743bf21d60","group_by":"wallet","pagination":{"page":1,"per_page":10},"source_input":"Combined"},"exampleResponse":{"data":[{"tokens_info":[{"token_name":"USD Coin","num_transfer":"15","token_symbol":"USDC","token_address":"0xa0b86991c6218b36c1d19d4a2e9eb0ce3606eb48"}],"volume_in_usd":800000.25,"volume_out_usd":450000.25,"total_volume_usd":1250000.5,"interaction_count":42,"counterparty_address":"0x742d35cc6634c0532925a3b8d4c9db96c4b4d8b6","counterparty_address_label":["Binance Hot Wallet"]}],"pagination":{"page":1,"per_page":10,"is_last_page":false}},"schema":null,"openapiUrl":null,"agentsTxtUrl":null,"citations":[{"claim":"Endpoint price is $0.05 per call via x402 protocol with fixed pricing","source_url":"https://api.nansen.ai"},{"claim":"Supports grouping by wallet or entity with source filtering (Combined, Tokens, ETH)","source_url":"https://api.nansen.ai"},{"claim":"Credit cost is 50 on free tier, 5 on pro tier","source_url":"https://api.nansen.ai"},{"claim":"High-volume addresses are limited to 180-day lookback","source_url":"https://api.nansen.ai"},{"claim":"x402 challenge confirmed live with 402 status on POST","source_url":"https://api.nansen.ai"}],"useCases":["Identify the most frequent transaction partners of a wallet by count and volume","Analyze net value flows between addresses to detect funding sources","Map exchange and DeFi protocol interaction patterns for a specific wallet","Investigate high-value transfer relationships for compliance or research","Build wallet relationship graphs for on-chain intelligence"],"bestFor":["On-chain investigators analyzing wallet interaction patterns","Trading desks profiling counterparty relationships","Compliance teams mapping fund flows between entities","Researchers studying DeFi protocol usage by specific wallets"],"notFor":["Real-time trade execution or order routing","Historical price or OHLCV data (use the TGM token-ohlcv endpoint instead)","Bulk scanning of thousands of wallets simultaneously (rate-limited)"],"kindDetails":{},"updatedAt":"2026-04-22T01:40:57.626Z"}}