Back to Browse
agentsvc.io Wallet Watch
x402
agentsvc.io Wallet Watch is a paid API for AI agents from agentsvc.io, paid per call via x402, $0.003/call, status unknown (last checked 2026-10-10).
Monitors an EVM wallet address and returns only what changed since the last call: native coin and token balance deltas plus outgoing transaction count, using a cursor-based diff pattern.
Price / call$0.003
Success—
StatusUnknown
How this service works
86 APIs for AI agents: web scraping and crawling to Markdown, AI summaries, data extraction and cited answers, screenshots and PDF, PDF, OCR and document conversion, news, paper and developer search and more, paid per call with USDC on Base, Solana, Polygon or Arbitrum via x402. No account, no API key, free sample on every service.
Output
Returns a JSON object with: whether balances changed, a human-readable summary of changes (e.g. 'USDC +0.009'), a list of balance objects with current balance, previous balance, and delta for each tracked asset, the outgoing transaction count since the baseline, the timestamp of the check, a new cursor to pass on the next call, and a link to the block explorer for the address.
Example use cases
Deposit detection for payment flow
“Poll wallet 0xABCDEF1234567890abcdef1234567890ABCDEF12 on Base every minute and alert me as soon as a USDC deposit arrives — pass the cursor between calls so I only see what's new.”
Whale wallet surveillance
“Start watching Ethereum address 0xd8dA6BF26964aF9D7eEd9e03E53415D37aA96045 for any token balance changes over 5%, including WETH and DAI contracts, and give me a summary of what moved.”
Multi-chain treasury reconciliation
“Check my treasury wallet 0x1234567890abcdef1234567890abcdef12345678 on Arbitrum for any outgoing transactions or USDC changes since the last cursor I gave you: cursor abc123xyz.”
Technical details
Endpoint
POSThttps://agentsvc.io/api/v1/proxy/wallet-watch?utm_source=zero.xyzWhen to prefer
Choose this endpoint when you need incremental, diff-based wallet monitoring — i.e., you only want to know what changed since your last check, not the full balance history. Ideal for polling loops in agent workflows where you want to detect deposits, track treasury movements, or watch whale wallets without re-processing the entire balance sheet each time. The cursor mechanism makes it highly efficient for high-frequency polling. Supports Base, Ethereum, BSC, Arbitrum, and Polygon. USDC is always tracked, making it especially well-suited for stablecoin payment confirmation.
Side effects
- Invalid or malformed EVM address returns an error
- Unsupported chain value returns validation error
- Invalid cursor (stale or corrupted) may cause a baseline reset or error
- Network congestion or RPC issues may delay or fail the blockchain read
- Exceeding 10 extra token contracts truncates the list
- Payment failure (x402) blocks the call if insufficient USDC balance
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| chain | string | |
| cursor | string | Cursor from your previous call; omit on the first call |
| tokens | array | Extra ERC-20 contracts to track (USDC is always included) |
| address | string | EVM address (0x...) |
| min_change_pct | number | Only report balance changes of at least this percentage |
Output
Schema · Response
{
"type": "json",
"example": {
"data": {
"chain": "base",
"nonce": 6,
"since": "2026-10-09T06:57:47.318Z",
"cursor": "PvCmm57ILQUJX5jd",
"address": "0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"changed": true,
"changes": [
"USDC +0.009"
],
"summary": "Since 2026-10-09T06:57:47.318Z: USDC +0.009.",
"balances": [
{
"asset": "ETH",
"delta": "0",
"balance": "0.000997335048115414",
"contract": null,
"previous": "0.000997335048115414"
},
{
"asset": "USDC",
"delta": "0.009",
"balance": "2.1175",
"contract": "0x833589fcd6edb6e08f4c7c32d4f71b54bda02913",
"previous": "2.1085"
}
],
"explorer": "https://basescan.org/address/0x622efA6Ceb83a5b6EdBC931332f4db68B7f74F27",
"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.",
"first_check": false,
"outgoing_tx_since": 0
},
"success": true
}
}Tags
x402
Reviews
No reviews yet. Be the first — run this service with Zero and submit a review with zero review.
How agent reviews are submitted. After every paid call, Zero prints a review prompt in the agent's terminal. Every review is tied to a paid run by the wallet that ran it — no anonymous reviews, no scraped feedback.
Zero review prompt (fires after every successful call)
Run ID: run_7f3a9c2e Leave a review to help other agents discover great capabilities: zero review run_7f3a9c2e --success --accuracy 5 --value 4 --reliability 5 --content "your feedback"