> ## Documentation Index > Fetch the complete documentation index at: https://docs.gomaestro.org/llms.txt > Use this file to discover all available pages before exploring further. > Decode a Partially Signed Bitcoin Transaction (PSBT) to analyze inputs, outputs, and signing requirements. # Decode PSBT ## OpenAPI ````yaml bitcoin/node-rpc-api/openapi.json post /transaction/psbt/decode openapi: 3.1.0 info: description: >- This API offers direct, low-latency access to Bitcoin full nodes via API (JSON-RPC protocol), giving developers reliable mempool visibility, transaction relay capabilities, and chain data without the hassle of running their own infrastructure. #### Key Features: - **Full JSON-RPC Support:** Access core Bitcoin functionality through RPC calls like `getblock`, `getrawtransaction`, `sendrawtransaction`, etc. - **Blockchain Data Retrieval:** Developers can fetch detailed information about blocks, transactions, and addresses. - **Mempool Insight:** Query unconfirmed transactions for faster, more responsive, real-time data access. - **High-Availability**: Enterprise-grade infrastructure ensures uptime, sync accuracy and fast transaction relay. #### Key Benefits for Developers: - Skip the operational complexity and computational overhead of maintaining self-hosted Bitcoin nodes. - Query mempool and chain data to power wallets, explorers, and backends with minimal latency. - Broadcast and verify transactions with trusted relay endpoints. - Build production-ready Bitcoin apps without worrying about node health, bandwidth, or reorg handling. title: Bitcoin - Node RPC API version: 0.1.1 servers: - description: Bitcoin Mainnet url: https://xbt-mainnet.gomaestro-api.org/v0/rpc - description: Bitcoin Testnet url: https://xbt-testnet.gomaestro-api.org/v0/rpc security: - api-key: [] externalDocs: description: '' url: '' paths: /transaction/psbt/decode: post: tags: - Transactions summary: Decode PSBT description: >- Takes a signed PSBT hex and returns the internal structure. Covers UTXO metadata, BIP32 deriv paths, inputs/outputs, etc. Useful for hardware wallet or multisig integrations. operationId: rpc_psbt_decode requestBody: content: application/json: schema: type: string description: Signed PSBT Hex. required: true responses: '200': content: application/json: schema: $ref: '#/components/schemas/api_bitcoin.PSBTResponseBody' description: OK '400': content: application/json: schema: $ref: '#/components/schemas/api_bitcoin.NodeRPCError' description: Node RPC error. '500': content: application/json: schema: $ref: '#/components/schemas/api_bitcoin.APIError' description: Internal server error. components: schemas: api_bitcoin.PSBTResponseBody: properties: data: $ref: '#/components/schemas/api_bitcoin.PSBT' last_updated: $ref: '#/components/schemas/api_bitcoin.LastUpdatedBlock' type: object api_bitcoin.NodeRPCError: properties: code: description: Error code returned from the API request example: 0 type: integer node rpc error: description: Error returned from the API request example: node rpc error type: string type: object api_bitcoin.APIError: properties: error: description: Error returned from the API request example: Bad Request type: string type: object api_bitcoin.PSBT: properties: fee: type: number global_xpubs: items: {} type: array uniqueItems: false inputs: items: properties: bip32_derivs: items: properties: master_fingerprint: type: string path: type: string pubkey: type: string type: object type: array uniqueItems: false non_witness_utxo: properties: hash: type: string locktime: type: integer size: type: integer txid: type: string version: type: integer vin: items: properties: scriptSig: properties: asm: type: string hex: type: string type: object sequence: type: integer txid: type: string vout: type: integer type: object type: array uniqueItems: false vout: items: properties: 'n': type: integer scriptPubKey: properties: address: type: string asm: type: string desc: type: string hex: type: string type: type: string type: object value: type: number type: object type: array uniqueItems: false vsize: type: integer weight: type: integer type: object witness_utxo: properties: amount: type: number scriptPubKey: properties: address: type: string asm: type: string desc: type: string hex: type: string type: type: string type: object type: object type: object type: array uniqueItems: false outputs: items: properties: bip32_derivs: items: properties: master_fingerprint: type: string path: type: string pubkey: type: string type: object type: array uniqueItems: false type: object type: array uniqueItems: false proprietary: items: {} type: array uniqueItems: false psbt_version: type: integer tx: properties: hash: type: string locktime: type: integer size: type: integer txid: type: string version: type: integer vin: items: properties: scriptSig: properties: asm: type: string hex: type: string type: object sequence: type: integer txid: type: string vout: type: integer type: object type: array uniqueItems: false vout: items: properties: 'n': type: integer scriptPubKey: properties: address: type: string asm: type: string desc: type: string hex: type: string type: type: string type: object value: type: number type: object type: array uniqueItems: false vsize: type: integer weight: type: integer type: object unknown: type: object type: object api_bitcoin.LastUpdatedBlock: properties: block_hash: type: string block_height: type: integer type: object securitySchemes: api-key: description: Project API Key in: header name: api-key type: apiKey ````