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chainquery utxoupdatepsbt – Fill PSBT UTXOs via Bitcoin Core
x402
chainquery utxoupdatepsbt – Fill PSBT UTXOs via Bitcoin Core is a paid API for AI agents from x402.chainquery.com, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-15).
Fills missing UTXO and script data in a PSBT by querying the live UTXO set on chainquery's independent Bitcoin full node (Bitcoin Core utxoupdatepsbt RPC).
Price / call$0.01
Success—
StatusUnknown
How this service works
chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Fill a PSBT's missing UTXO and script data from the UTXO set, via chainquery's independent full node. Bitcoin Core utxoupdatepsbt.
Output
Returns the Bitcoin Core utxoupdatepsbt result: an updated PSBT (base64-encoded) with any missing UTXO fields (witness_utxo, non_witness_utxo, scriptPubKey, amount, redeemScript, witnessScript) populated from the current live UTXO set on chainquery's full node.
Example use cases
Example prompt
“I have a PSBT that's missing its UTXO inputs — can you call utxoupdatepsbt on chainquery to fill in the missing UTXO and script data so I can sign it? Here's the base64 PSBT: cHNidP8BAH...”
Technical details
Endpoint
GEThttps://x402.chainquery.com/v1/rpc/utxoupdatepsbtWhen to prefer
Use this endpoint when you need to enrich a PSBT with live UTXO data without running your own Bitcoin full node. It is ideal for wallet builders, PSBT signing workflows, and multi-party transaction construction where inputs lack witness/script metadata. Prefer it over alternatives when you want pay-per-call access with no API key setup and trust in an independent (non-custodial) full node.
Side effects
- PSBT inputs reference UTXOs already spent or not found in the UTXO set — result may be partial or unchanged
- Malformed or invalid base64 PSBT string — RPC returns an error
- Missing required 'params' query parameter containing the PSBT — request fails
- Payment of $0.01 USDC not fulfilled via x402 protocol — 402 Payment Required returned
- Node temporarily unavailable — connection or timeout error
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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