Blockstream Assets API

openapi: 3.1.0
info:
  title: Blockstream Esplora HTTP Addresses Assets API
  version: '1.0'
  description: Esplora is Blockstream's open-source Bitcoin block explorer and its HTTP REST API. It provides read access to blocks, transactions, addresses, the mempool, fee estimates, and (on Liquid/Elements networks) issued assets. The API is public and requires no authentication. The same API backs blockstream.info and its testnet, signet, and Liquid networks. Amounts are in satoshis; hashes and txids are hex-encoded.
  x-generated: '2026-07-18'
  x-method: generated
  x-source: https://github.com/Blockstream/esplora/blob/master/API.md
  contact:
    name: Blockstream Esplora
    url: https://github.com/Blockstream/esplora
  license:
    name: MIT
    url: https://github.com/Blockstream/esplora/blob/master/LICENSE
servers:
- url: https://blockstream.info/api
  description: Bitcoin mainnet
- url: https://blockstream.info/testnet/api
  description: Bitcoin testnet
- url: https://blockstream.info/signet/api
  description: Bitcoin signet
- url: https://blockstream.info/liquid/api
  description: Liquid mainnet
- url: https://blockstream.info/liquidtestnet/api
  description: Liquid testnet
tags:
- name: Assets
paths:
  /asset/{asset_id}:
    get:
      operationId: getAsset
      summary: Get asset information (Liquid/Elements only)
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Asset object
  /asset/{asset_id}/txs:
    get:
      operationId: getAssetTransactions
      summary: Get transactions for an asset (Liquid/Elements only)
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Array of transaction objects
  /asset/{asset_id}/txs/mempool:
    get:
      operationId: getAssetMempoolTransactions
      summary: Get mempool transactions for an asset (Liquid/Elements only)
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: Array of unconfirmed transaction objects
  /asset/{asset_id}/txs/chain/{last_seen}:
    get:
      operationId: getAssetTransactionsChain
      summary: Paginate confirmed asset transactions (Liquid/Elements only)
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        schema:
          type: string
      - name: last_seen
        in: path
        required: false
        schema:
          type: string
      responses:
        '200':
          description: Array of confirmed transaction objects
  /asset/{asset_id}/supply:
    get:
      operationId: getAssetSupply
      summary: Get current total asset supply (Liquid/Elements only)
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: The current asset supply
  /asset/{asset_id}/supply/decimal:
    get:
      operationId: getAssetSupplyDecimal
      summary: Get asset supply with decimal formatting (Liquid/Elements only)
      tags:
      - Assets
      parameters:
      - name: asset_id
        in: path
        required: true
        schema:
          type: string
      responses:
        '200':
          description: The current asset supply
          decimal-formatted: null
  /assets/registry:
    get:
      operationId: getAssetsRegistry
      summary: Get the list of issued assets (Liquid/Elements only)
      tags:
      - Assets
      responses:
        '200':
          description: Array of registered assets with filtering and sorting