> ## 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.

> Get Merkle block proof for a Bitcoin transaction in serialized format for SPV verification.

# Transaction Merkleblock Proof



## OpenAPI

````yaml bitcoin/esplora-api/openapi.json get /tx/{txid}/merkleblock-proof
openapi: 3.0.3
info:
  title: Bitcoin - Esplora API
  version: 1.0.0
  description: >
    OpenAPI spec for core Esplora endpoints: blocks, transactions, addresses,
    mempool, fees, UTXO data and more.
servers:
  - url: https://xbt-mainnet.gomaestro-api.org/v0/esplora
  - url: https://xbt-testnet.gomaestro-api.org/v0/esplora
security:
  - api-key: []
paths:
  /tx/{txid}/merkleblock-proof:
    get:
      tags:
        - Transactions
      summary: Transaction Merkleblock Proof
      description: >-
        Returns a merkle inclusion proof for the transaction using bitcoind's
        merkleblock format.
      parameters:
        - name: txid
          in: path
          required: true
          schema:
            type: string
            example: d78b1139140848e646cfd7eb95868d2e01c600c3922de88038c591d2fb55cf96
          description: The transaction ID to retrieve the merkleblock proof for.
      responses:
        '200':
          description: Merkleblock proof in binary format (as raw hex string)
          content:
            application/octet-stream:
              schema:
                type: string
                format: binary
                description: Raw merkleblock proof binary data
        '400':
          description: Invalid txid format
        '404':
          description: Transaction not found or not confirmed
components:
  securitySchemes:
    api-key:
      type: apiKey
      in: header
      name: api-key
      description: Project API Key

````