Arweave Blocks API

openapi: 3.1.0
info:
  title: Arweave HTTP Node Blocks API
  description: 'The core Arweave node REST API for submitting and retrieving transactions, uploading data chunks, querying wallet balances, fetching blocks, and inspecting network state. Requests target any Arweave node on port 1984 (default gateway arweave.net). Amounts are denominated in winstons (1 AR = 10^12 winstons).

    '
  version: 1.0.0
  contact:
    name: Arweave Team
    url: https://www.arweave.org/
    email: team@arweave.org
  termsOfService: https://www.arweave.org/legal/terms-of-use
  license:
    name: MIT
    url: https://opensource.org/licenses/MIT
servers:
- url: https://arweave.net
  description: Arweave public gateway
- url: http://localhost:1984
  description: Local Arweave node (default port 1984)
tags:
- name: Blocks
  description: Endpoints for retrieving block data
paths:
  /block/hash/{id}:
    get:
      operationId: getBlockByHash
      summary: Get block by hash
      description: 'Retrieve a full block object by its independent hash (indep_hash). Include the header X-Block-Format: 2 to request the v2 block format.

        '
      tags:
      - Blocks
      parameters:
      - name: id
        in: path
        required: true
        description: Block independent hash (indep_hash, Base64URL encoded)
        schema:
          type: string
      responses:
        '200':
          description: Block returned
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Block'
        '404':
          description: Block not found
  /block/height/{height}:
    get:
      operationId: getBlockByHeight
      summary: Get block by height
      description: 'Retrieve a full block object by its block height (block number). Include the header X-Block-Format: 2 to request the v2 block format.

        '
      tags:
      - Blocks
      parameters:
      - name: height
        in: path
        required: true
        description: Block height (block number, 0-indexed)
        schema:
          type: integer
          minimum: 0
      responses:
        '200':
          description: Block returned
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Block'
        '404':
          description: Block not found
components:
  schemas:
    Block:
      type: object
      description: An Arweave block
      properties:
        nonce:
          type: string
          description: Block nonce used in proof of work
        previous_block:
          type: string
          description: Hash of the previous block (indep_hash)
        timestamp:
          type: integer
          description: Unix timestamp of the block
        diff:
          type: string
          description: Mining difficulty at the time of the block
        height:
          type: integer
          description: Block height
        hash:
          type: string
          description: Mining hash of the block
        indep_hash:
          type: string
          description: Independent hash uniquely identifying the block
        txs:
          type: array
          description: List of transaction IDs in the block
          items:
            type: string
        wallet_list:
          type: string
          description: Hash of the wallet list merkle tree
        reward_addr:
          type: string
          description: Wallet address of the miner who found this block
        reward_pool:
          type: string
          description: Current mining reward pool size in winstons
        weave_size:
          type: string
          description: Total size of the weave in bytes at this block
        block_size:
          type: string
          description: Size of all transaction data in this block in bytes
        cumulative_diff:
          type: string
          description: Cumulative mining difficulty up to this block
        hash_list_merkle:
          type: string
          description: Merkle root of the block hash list
        poa:
          type: object
          description: Proof of access data
          properties:
            option:
              type: string
            tx_path:
              type: string
            data_path:
              type: string
            chunk:
              type: string
externalDocs:
  description: Arweave HTTP API Documentation
  url: https://docs.arweave.org/developers/arweave-node-server/http-api