{"success":true,"data":{"id":"svc_wallet_watch_01","slug":"wallet-watch","name":"Wallet Activity Monitor (balance changes, outgoing tx)","description":"Wallet monitoring for agents: watch an EVM address and get only what changed since your last call: native coin and token balance deltas (USDC always included, up to 10 more tokens) and the number of outgoing transactions. Read directly from the blockchain. First call saves a baseline and returns a cursor; pass it on the next call. For treasury and payment tracking, whale and smart-money watching, deposit detection. Chains: base, ethereum, bsc, arbitrum, polygon. Params: address, chain (default base), tokens (list of ERC-20 contracts), min_change_pct (ignore smaller balance moves), cursor.","category":"finance","endpoint":"https://agentsvc.io/api/v1/proxy/wallet-watch","price_usdc":0.003,"latency_p99_ms":4000,"input_schema":{"type":"object","required":["address"],"properties":{"address":{"type":"string","description":"EVM address (0x...)"},"chain":{"type":"string","enum":["base","ethereum","bsc","arbitrum","polygon"],"default":"base"},"tokens":{"type":"array","items":{"type":"string"},"maxItems":10,"description":"Extra ERC-20 contracts to track (USDC is always included)"},"min_change_pct":{"type":"number","default":0,"description":"Only report balance changes of at least this percentage"},"cursor":{"type":"string","description":"Cursor from your previous call; omit on the first call"}}},"output_schema":{"type":"object","properties":{"address":{"type":"string"},"chain":{"type":"string"},"first_check":{"type":"boolean"},"changed":{"type":"boolean"},"cursor":{"type":"string"},"since":{"type":"string"},"checked_at":{"type":"string"},"cursor_help":{"type":"string"},"summary":{"type":"string"},"changes":{"type":"array","items":{"type":"string"}},"balances":{"type":"array","items":{"type":"object","properties":{"asset":{"type":"string"},"contract":{},"balance":{"type":"string"},"previous":{"type":"string"},"delta":{"type":"string"}}}},"outgoing_tx_since":{"type":"integer"},"nonce":{"type":"integer"},"explorer":{"type":"string"}},"required":["changed","cursor","summary","changes"],"example":{"address":"0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27","chain":"base","first_check":false,"changed":true,"cursor":"PvCmm57ILQUJX5jd","since":"2026-10-09T06:57:47.318Z","checked_at":"2026-10-09T06:57:47.459Z","cursor_help":"Pass this cursor on your next call. It only advances when a change is reported.","summary":"Since 2026-10-09T06:57:47.318Z: USDC +0.009.","changes":["USDC +0.009"],"balances":[{"asset":"ETH","contract":null,"balance":"0.000997335048115414","previous":"0.000997335048115414","delta":"0"},{"asset":"USDC","contract":"0x833589fcd6edb6e08f4c7c32d4f71b54bda02913","balance":"2.1175","previous":"2.1085","delta":"0.009"}],"outgoing_tx_since":0,"nonce":6,"explorer":"https://basescan.org/address/0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27"}},"is_active":true,"provider":"agentsvc.io","tags":["wallet-monitor","whale-tracking","balance-alert","onchain","monitoring"],"method":"POST","example_input":{"address":"0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27","chain":"base"},"price_atomic":"3000","price_display":"$0.003 USDC","try_url":"https://agentsvc.io/api/v1/try/wallet-watch","try_limit_per_day":3,"info_url":"https://agentsvc.io/api/v1/services/wallet-watch","page_url":"https://agentsvc.io/services/wallet-watch","curl_example":"curl -X POST https://agentsvc.io/api/v1/proxy/wallet-watch -H \"Content-Type: application/json\" -d '{\"address\":\"0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27\",\"chain\":\"base\"}'","status":{"ok":true,"latency_ms":51,"checked_at":"2026-10-09T08:38:36.836Z"}},"payment":{"protocol":"x402","x402_versions_accepted":[1,2],"scheme":"exact","network":"eip155:8453","network_v1":"base","chain_id":8453,"asset":"USDC","asset_contract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913","asset_decimals":6,"eip712_domain":{"name":"USD Coin","version":"2","chainId":8453,"verifyingContract":"0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913"},"pay_to":"0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27","facilitator":"https://api.cdp.coinbase.com/platform/v2/x402","request_header_v2":"PAYMENT-SIGNATURE","request_header_v1":"X-PAYMENT","requirements_v2":"base64 JSON in the PAYMENT-REQUIRED response header of the 402","requirements_v1":"JSON body of the 402 (accepts[0])","receipt_header":"PAYMENT-RESPONSE (and X-PAYMENT-RESPONSE): base64 JSON with transaction hash","accounts_required":false,"api_keys_required":false,"settlement":"per call, on-chain, after the service succeeded. Failed calls are never charged.","also_accepted":[{"network":"solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp","network_v1":"solana","asset":"USDC","asset_mint":"EPjFWdd5AufqSSqeM2qN1xzybapC8G4wEGGkZwyTDt1v","pay_to":"5JzPS5qpEwUM1vTC9GG7uqvwJdHzbEwfoPHf2Ki977tg","note":"Solana option is accepts[1] in the 402. The facilitator pays the transaction fee (extra.feePayer); the payer needs only USDC, no SOL."}]},"links":{"catalog":"https://agentsvc.io/api/v1/services","payment_requirements":"https://agentsvc.io/api/v1/payment-requirements","credits":"https://agentsvc.io/api/v1/credits","openapi":"https://agentsvc.io/openapi.json","llms_txt":"https://agentsvc.io/llms.txt","llms_full_txt":"https://agentsvc.io/llms-full.txt","agents_md":"https://agentsvc.io/AGENTS.md","skill_md":"https://agentsvc.io/SKILL.md","status":"https://agentsvc.io/api/v1/status","docs":"https://agentsvc.io/docs","mcp_server":"https://agentsvc.io/mcp-server.mjs","discovery":"https://agentsvc.io/.well-known/x402","agent_card":"https://agentsvc.io/.well-known/agent-card.json"}}