Kraken Futures REST API — Charts

naftiko: 1.0.0-alpha2
info:
  label: Kraken Futures REST API — Charts
  description: 'Kraken Futures REST API — Charts. 1 operations. Lead operation: Kraken Get Chart Candles. Self-contained Naftiko capability covering one Kraken business surface.'
  tags:
    - Kraken
    - Cryptocurrency
    - Charts
  created: '2026-05-30'
  modified: '2026-05-30'
binds:
  - namespace: env
    keys:
      KRAKEN_FUTURES_API_KEY: KRAKEN_FUTURES_API_KEY
capability:
  consumes:
    - type: http
      namespace: futures-rest-charts
      baseUri: https://futures.kraken.com/derivatives/api/v3
      description: Kraken Futures REST API — Charts business capability. Self-contained, no shared references.
      authentication:
        type: apikey
        key: API-Key
        value: '{{env.KRAKEN_FUTURES_API_KEY}}'
        placement: header
      resources:
        - name: charts-ticksize-symbol-interval
          path: /charts/{tickSize}/{symbol}/{interval}
          operations:
            - name: getChartCandles
              method: GET
              description: Kraken Get Chart Candles
              inputParameters:
                - name: tickSize
                  in: path
                  type: string
                  required: true
                  description: tickSize
                - name: symbol
                  in: path
                  type: string
                  required: true
                  description: symbol
                - name: interval
                  in: path
                  type: string
                  required: true
                  description: interval
                - name: from
                  in: query
                  type: integer
                  required: false
                  description: from
                - name: to
                  in: query
                  type: integer
                  required: false
                  description: to
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
  exposes:
    - type: rest
      namespace: futures-rest-charts-rest
      port: 8080
      description: REST adapter for Kraken Futures REST API — Charts. One Spectral-compliant resource per consumed operation, prefixed with /v1.
      resources:
        - path: /v1/charts/{ticksize}/{symbol}/{interval}
          name: charts-ticksize-symbol-interval
          description: REST surface for /charts/{tickSize}/{symbol}/{interval}.
          operations:
            - method: GET
              name: getChartCandles
              description: Kraken Get Chart Candles
              call: futures-rest-charts.getChartCandles
              with:
                tickSize: rest.tickSize
                symbol: rest.symbol
                interval: rest.interval
                from: rest.from
                to: rest.to
              outputParameters:
                - type: object
                  mapping: $.
    - type: mcp
      namespace: futures-rest-charts-mcp
      port: 9090
      transport: http
      description: MCP adapter for Kraken Futures REST API — Charts. One tool per consumed operation, routed inline through this capability's consumes block.
      tools:
        - name: kraken-get-chart-candles
          description: Kraken Get Chart Candles
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: futures-rest-charts.getChartCandles
          with:
            tickSize: tools.tickSize
            symbol: tools.symbol
            interval: tools.interval
            from: tools.from
            to: tools.to
          outputParameters:
            - type: object
              mapping: $.