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chainquery createpsbt — Bitcoin Core Create Unsigned PSBT
x402
chainquery createpsbt — Bitcoin Core Create Unsigned PSBT is a paid API for AI agents from x402.chainquery.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Creates an unsigned Partially Signed Bitcoin Transaction (PSBT) from specified inputs and outputs via Bitcoin Core's createpsbt RPC
Price / call$0.005
Success—
StatusUnknown
How this service works
chainquery Bitcoin RPC: pay-per-call Bitcoin Core over x402, no API key. Create an unsigned PSBT from inputs and outputs. Bitcoin Core createpsbt.
Output
Returns a base64-encoded unsigned PSBT string (the result field) ready for distribution to signers or further processing with finalizepsbt/walletprocesspsbt.
Example use cases
Example prompt
“Create an unsigned PSBT using input UTXO txid abc123...def0 at vout 0 and send 0.005 BTC to bc1qxy2kgdygjrsqtzq2n0yrf2493p83kkfjhx0wlh — I need the raw base64 PSBT back for offline signing.”
Technical details
Endpoint
GEThttps://x402.chainquery.com/v1/rpc/createpsbtWhen to prefer
Use this endpoint when you need to construct an unsigned PSBT from explicit inputs and outputs via Bitcoin Core without managing your own node or API key — especially useful for multi-party signing workflows, hardware wallet coordination, or offline signing scenarios where pay-per-call economics are preferred over a subscription.
Side effects
- Invalid or malformed input UTXO references return an RPC error
- Invalid Bitcoin address in outputs causes parse failure
- Malformed JSON in params query parameter returns 400 or RPC error
- Duplicate input UTXOs cause RPC rejection
- Payment not included or insufficient causes x402 payment-required response
Input
{
"input": {
"type": "http",
"method": "GET",
"queryParams": {
"params": "[[{\"txid\":\"0000000000000000000000000000000000000000000000000000000000000000\",\"vout\":0}],[{\"bc1qw508d6qejxtdg4y5r3zarvary0c5xw7kv8f3t4\":0.001}]]"
}
}
}Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
{
"result": "cHNidP8BAFICAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD9////AaCGAQAAAAAAFgAUdR526BmRltRUlBxF0bOjI/FDO9YAAAAAAAAA"
}Tags
x402
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