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Agent402 Bitcoin Address Validator
x402
Agent402 Bitcoin Address Validator is a paid API for AI agents from agent402.co.uk, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-14).
Validates Bitcoin address format and checksum for Base58Check (legacy/P2SH) and bech32/bech32m (native SegWit/Taproot) addresses without performing any on-chain UTXO lookup.
Price / call$0.001
Success—
StatusUnknown
How this service works
Don't burn tokens on deterministic work. Go/no-go jobs first: payout preflight, text firewall (PII/secrets), budget check — then rails, calendars, finmath. x402 USDC on Base. UK + global. agent402.co.uk — not agent402.tools. $0.001–$0.002 USDC on Base. No API keys.
Output
Returns a JSON object with a 'valid' boolean, an 'type' field indicating the address type (e.g. p2wpkh, p2pkh, p2sh, p2tr), and a 'chain' field (e.g. 'btc' or testnet equivalent). No on-chain state or UTXO balance is checked — purely structural and checksum validation.
Example use cases
Pre-withdrawal address sanity check
“I'm about to send 0.05 BTC to 1A1zP1eP5QGefi2DMPTfTL5SLmv7Divf — can you verify that address is valid and correctly formatted before I proceed?”
Classify SegWit vs legacy address
“Tell me what type of Bitcoin address bc1qrp33g0q5c5txsp9arysrx4k6zdkfs4nce4xj0gdcccefvpysxf3qccfmv3 is and whether it passes validation.”
Validate testnet address in dev workflow
“I'm testing my payment pipeline — check if this testnet Bitcoin address tb1qw508d6qejxtdg4y5r3zarvary0c5xw7kxpjzsx is structurally valid.”
Technical details
Endpoint
POSThttps://agent402.co.uk/v1/validate/btc-addressWhen to prefer
Use this endpoint when you need a cheap ($0.001), fast, offline-style structural and checksum validation of a Bitcoin address before initiating a payment or withdrawal. Prefer this over on-chain lookups when you only need to confirm the address is well-formed (not whether it has funds or has been used). It handles all major Bitcoin address formats: legacy Base58Check (1xxx, 3xxx), native SegWit bech32 (bc1q), and Taproot bech32m (bc1p).
Side effects
- Malformed or unsupported address format returns valid=false
- Non-Bitcoin addresses (Ethereum, Solana, etc.) are not recognized and will fail or return invalid
- Ambiguous or truncated addresses may return invalid
- Network errors may cause the endpoint to be temporarily unreachable
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| address | string | BTC address |
Output
Schema · Response
{
"type": "json",
"example": {
"type": "p2wpkh",
"chain": "btc",
"valid": true
}
}Tags
x402
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