Arkham Cluster API

openapi: 3.0.0
info:
  title: Arkham Intel Analytics Cluster API
  version: 1.1.0
tags:
- name: Cluster
paths:
  /cluster/{id}/summary:
    get:
      summary: Get cluster summary statistics
      description: 'Returns summary statistics for the specified cluster, including:

        - Total number of unique addresses in the cluster

        - Total balance in USD

        - Total transaction volume in USD

        - First and last transaction timestamps


        Clusters are groups of addresses that have been linked together through on-chain heuristics (e.g., Bitcoin input clustering).


        To find a cluster ID, look up an address with GET /intelligence/address_enriched/{address} and read its clusterIds field.'
      operationId: GetClusterSummary
      parameters:
      - name: id
        in: path
        description: The ID of the cluster to summarize.
        required: true
        schema:
          type: string
          description: The ID of the cluster to summarize.
          example: 00000002aae817c1a0d2ec3c91ede74c64c92c83658decdad52b591451948d75a9ca
      responses:
        '200':
          description: OK
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/ClusterSummary'
        '400':
          description: Bad Request
        '500':
          description: Internal Server Error
      tags:
      - Cluster
components:
  schemas:
    ClusterSummary:
      required:
      - clusterId
      - numAddresses
      - volumeUsd
      - balanceUsd
      - firstTx
      - lastTx
      type: object
      properties:
        balanceUsd:
          type: number
          example: 270448104.02
        clusterId:
          type: string
          example: 00000002aae817c1a0d2ec3c91ede74c64c92c83658decdad52b591451948d75a9ca
        firstTx:
          type: string
          format: date-time
          nullable: true
          example: '2018-11-12T14:22:37Z'
        lastTx:
          type: string
          format: date-time
          nullable: true
          example: '2026-06-19T00:58:41Z'
        numAddresses:
          type: integer
          example: 1894908
        volumeUsd:
          type: number
          example: 1782634995673.44
      example:
        balanceUsd: 270448104.02
        clusterId: 00000002aae817c1a0d2ec3c91ede74c64c92c83658decdad52b591451948d75a9ca
        firstTx: '2018-11-12T14:22:37Z'
        lastTx: '2026-06-19T00:58:41Z'
        numAddresses: 1894908
        volumeUsd: 1782634995673.44