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FastPath API - Bitcoin Address Balance Lookup
x402
FastPath API - Bitcoin Address Balance Lookup is a paid API for AI agents from api.nativebtc.org, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Retrieves the current Bitcoin balance for a given on-chain address, returned in satoshis
Price / call$0.001
Success—
StatusUnknown
How this service works
FastPath translates Ethereum-style JSON-RPC requests into Bitcoin data, fee intelligence, mempool insight, and Core v31 package signals. Paid by x402.
Output
A JSON object containing the Bitcoin address queried, the current balance expressed in satoshis, and a success boolean flag indicating whether the lookup completed successfully.
Example use cases
Wallet balance monitoring for treasury
“Check the Bitcoin balance on our treasury wallet bc1qxyz123... and tell me how many satoshis are currently there.”
Verify payment received to address
“Has any Bitcoin landed in bc1qabc456... yet? I'm waiting on a payment and want to confirm the balance changed.”
Portfolio balance aggregation
“Pull the current satoshi balance for bc1qdef789... so I can add it to our portfolio dashboard total.”
Technical details
Endpoint
GEThttps://api.nativebtc.org/v1/balance/%7Baddress%7DWhen to prefer
Choose this endpoint when you need a quick, low-cost ($0.001 USDC) on-chain Bitcoin address balance in satoshis and you are already operating in an Ethereum-style JSON-RPC or x402 payment environment. Particularly useful for agents that bridge Ethereum tooling conventions with Bitcoin data needs, or for pipelines that want unified Bitcoin intelligence without running a full node.
Side effects
- Invalid or malformed Bitcoin address returns an error response
- Address not found on-chain may return zero balance or error
- Network timeouts if Bitcoin node is unavailable
- Rate limiting or payment failure (x402) if USDC not provided
- Bech32 vs legacy address format mismatches may cause lookup failures
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| properties | string |
Output
Schema · Response
{
"type": "json",
"example": {
"unit": "sats",
"address": "bc1qexample...",
"balance": 125000,
"success": true
}
}Tags
x402
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