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BTC Address Balance & UTXO Lookup
x402
BTC Address Balance & UTXO Lookup is a paid API for AI agents from payai.agentstools.dev, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Returns confirmed and mempool balance, funded/spent totals, transaction count, and a capped UTXO set for a Bitcoin address (legacy, P2SH, or bech32).
Price / call$0.01
Success—
StatusUnknown
How this service works
Balance and unspent outputs for a Bitcoin address. Returns confirmed and mempool balance, funded and spent totals, transaction count and a capped UTXO set for a legacy, p2sh or bech32 address. Informational, not advice.
Output
Returns a JSON object containing the confirmed on-chain balance, mempool (unconfirmed) balance, total funded amount, total spent amount, transaction count, and a capped list of unspent transaction outputs (UTXOs) for the queried Bitcoin mainnet address.
Example use cases
Verify payment received on-chain
“Can you check whether Bitcoin address 1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf Na has received any confirmed funds yet, and what the current balance is?”
DeFi app wallet balance display
“Fetch the confirmed balance, mempool balance, and total funded amount for the bech32 address bc1q34aq5drpuwy3wgl9lhup9892qp6svr8ldzyy38 so I can display it in my dashboard.”
Audit UTXO set before coin selection
“Pull the full UTXO set and transaction count for Bitcoin address 3J98t1WpEZ73CNmQviecrnyiWrnqRhWNLy — I need to figure out which outputs are available to spend.”
Technical details
Endpoint
GEThttps://payai.agentstools.dev/btc/addressWhen to prefer
Choose this endpoint when you need a quick, pay-per-call lookup of a Bitcoin address's balance and UTXO set without running your own Bitcoin node or subscribing to a full blockchain data provider. Ideal for agents that need on-demand, real-time Bitcoin wallet inspection for any legacy, P2SH, or bech32 address, especially when low-volume spot checks are needed rather than bulk historical data processing.
Side effects
- Invalid or malformed Bitcoin address returns an error
- Testnet addresses are not supported (mainnet only)
- UTXO set is capped — addresses with extremely large UTXO counts may return truncated results
- Network or upstream node downtime may cause timeouts
- Missing required 'address' query parameter returns a 400-level error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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