Kraken · Capability

Kraken Spot WebSocket API v2 — Streams

Kraken Spot WebSocket API v2 — Streams. 12 channel operations covering ticker, book, ohlc, trade, instrument, and the connection-level ping/heartbeat/status frames. Self-contained Naftiko capability covering one Kraken business surface.

Run with Naftiko KrakenCryptocurrencyStreams

What You Can Do

POST
Subscribe ticker — Receive ticker snapshot and updates from the server.
/v1/streams/ticker/subscribe
POST
Publish ticker — Subscribe or unsubscribe from the ticker channel.
/v1/streams/ticker/publish
POST
Subscribe book — Receive book snapshot and update messages.
/v1/streams/book/subscribe
POST
Publish book — Subscribe or unsubscribe from the book channel.
/v1/streams/book/publish
POST
Subscribe ohlc — Receive OHLC snapshot and update messages.
/v1/streams/ohlc/subscribe
POST
Publish ohlc — Subscribe or unsubscribe from the ohlc channel.
/v1/streams/ohlc/publish
POST
Subscribe trade — Receive trade snapshot and update messages.
/v1/streams/trade/subscribe
POST
Publish trade — Subscribe or unsubscribe from the trade channel.
/v1/streams/trade/publish
POST
Subscribe instrument — Receive instrument snapshot and update messages.
/v1/streams/instrument/subscribe
POST
Publish instrument — Subscribe or unsubscribe from the instrument channel.
/v1/streams/instrument/publish
POST
Subscribe ping — Receive pong response from the server.
/v1/streams/ping/subscribe
POST
Publish ping — Send a ping to the server.
/v1/streams/ping/publish

MCP Tools

receive-ticker-snapshot-and-updates

Receive ticker snapshot and updates from the server.

read-only idempotent
subscribe-unsubscribe-ticker-channel

Subscribe or unsubscribe from the ticker channel.

idempotent
receive-book-snapshot-and-update

Receive book snapshot and update messages.

read-only idempotent
subscribe-unsubscribe-book-channel

Subscribe or unsubscribe from the book channel.

idempotent
receive-ohlc-snapshot-and-update

Receive OHLC snapshot and update messages.

read-only idempotent
subscribe-unsubscribe-ohlc-channel

Subscribe or unsubscribe from the ohlc channel.

idempotent
receive-trade-snapshot-and-update

Receive trade snapshot and update messages.

read-only idempotent
subscribe-unsubscribe-trade-channel

Subscribe or unsubscribe from the trade channel.

idempotent
receive-instrument-snapshot-and-update

Receive instrument snapshot and update messages.

read-only idempotent
subscribe-unsubscribe-instrument-channel

Subscribe or unsubscribe from the instrument channel.

idempotent
receive-pong-response-server

Receive pong response from the server.

read-only idempotent
send-ping-server

Send a ping to the server.

idempotent

Capability Spec

spot-websocket-v2-streams.yaml Raw ↑ 
naftiko: 1.0.0-alpha2
info:
  label: Kraken Spot WebSocket API v2 — Streams
  description: Kraken Spot WebSocket API v2 — Streams. 12 channel operations covering ticker, book, ohlc, trade, instrument, and the connection-level ping/heartbeat/status frames. Self-contained Naftiko capability covering one Kraken business surface.
  tags:
    - Kraken
    - Cryptocurrency
    - Streams
  created: '2026-05-30'
  modified: '2026-05-30'
binds:
  - namespace: env
    keys:
      KRAKEN_WS_TOKEN: KRAKEN_WS_TOKEN
capability:
  consumes:
    - type: websocket
      namespace: spot-websocket-v2-streams
      baseUri: wss://ws.kraken.com/v2
      description: Kraken Spot WebSocket API v2 — Streams business capability. Self-contained, no shared references.
      authentication:
        type: bearer
        token: '{{env.KRAKEN_WS_TOKEN}}'
      resources:
        - name: channels
          path: /
          operations:
            - name: subscribe-ticker
              method: RECEIVE
              description: Receive ticker snapshot and updates from the server.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: publish-ticker
              method: SUBSCRIBE
              description: Subscribe or unsubscribe from the ticker channel.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: subscribe-book
              method: RECEIVE
              description: Receive book snapshot and update messages.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: publish-book
              method: SUBSCRIBE
              description: Subscribe or unsubscribe from the book channel.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: subscribe-ohlc
              method: RECEIVE
              description: Receive OHLC snapshot and update messages.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: publish-ohlc
              method: SUBSCRIBE
              description: Subscribe or unsubscribe from the ohlc channel.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: subscribe-trade
              method: RECEIVE
              description: Receive trade snapshot and update messages.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: publish-trade
              method: SUBSCRIBE
              description: Subscribe or unsubscribe from the trade channel.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: subscribe-instrument
              method: RECEIVE
              description: Receive instrument snapshot and update messages.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: publish-instrument
              method: SUBSCRIBE
              description: Subscribe or unsubscribe from the instrument channel.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: subscribe-ping
              method: RECEIVE
              description: Receive pong response from the server.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
            - name: publish-ping
              method: SUBSCRIBE
              description: Send a ping to the server.
              inputParameters:
                - name: channel
                  in: body
                  type: string
                  required: true
                  description: Channel name.
                - name: params
                  in: body
                  type: object
                  required: false
                  description: Channel-specific subscribe params.
              outputRawFormat: json
              outputParameters:
                - name: result
                  type: object
                  value: $.
  exposes:
    - type: rest
      namespace: spot-websocket-v2-streams-rest
      port: 8080
      description: REST adapter for Kraken Spot WebSocket API v2 — Streams.
      resources:
        - path: /v1/streams/ticker/subscribe
          name: ticker-subscribe
          description: REST surface for ticker subscribe.
          operations:
            - method: POST
              name: subscribe-ticker
              description: Receive ticker snapshot and updates from the server.
              call: spot-websocket-v2-streams.subscribe-ticker
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/ticker/publish
          name: ticker-publish
          description: REST surface for ticker publish.
          operations:
            - method: POST
              name: publish-ticker
              description: Subscribe or unsubscribe from the ticker channel.
              call: spot-websocket-v2-streams.publish-ticker
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/book/subscribe
          name: book-subscribe
          description: REST surface for book subscribe.
          operations:
            - method: POST
              name: subscribe-book
              description: Receive book snapshot and update messages.
              call: spot-websocket-v2-streams.subscribe-book
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/book/publish
          name: book-publish
          description: REST surface for book publish.
          operations:
            - method: POST
              name: publish-book
              description: Subscribe or unsubscribe from the book channel.
              call: spot-websocket-v2-streams.publish-book
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/ohlc/subscribe
          name: ohlc-subscribe
          description: REST surface for ohlc subscribe.
          operations:
            - method: POST
              name: subscribe-ohlc
              description: Receive OHLC snapshot and update messages.
              call: spot-websocket-v2-streams.subscribe-ohlc
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/ohlc/publish
          name: ohlc-publish
          description: REST surface for ohlc publish.
          operations:
            - method: POST
              name: publish-ohlc
              description: Subscribe or unsubscribe from the ohlc channel.
              call: spot-websocket-v2-streams.publish-ohlc
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/trade/subscribe
          name: trade-subscribe
          description: REST surface for trade subscribe.
          operations:
            - method: POST
              name: subscribe-trade
              description: Receive trade snapshot and update messages.
              call: spot-websocket-v2-streams.subscribe-trade
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/trade/publish
          name: trade-publish
          description: REST surface for trade publish.
          operations:
            - method: POST
              name: publish-trade
              description: Subscribe or unsubscribe from the trade channel.
              call: spot-websocket-v2-streams.publish-trade
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/instrument/subscribe
          name: instrument-subscribe
          description: REST surface for instrument subscribe.
          operations:
            - method: POST
              name: subscribe-instrument
              description: Receive instrument snapshot and update messages.
              call: spot-websocket-v2-streams.subscribe-instrument
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/instrument/publish
          name: instrument-publish
          description: REST surface for instrument publish.
          operations:
            - method: POST
              name: publish-instrument
              description: Subscribe or unsubscribe from the instrument channel.
              call: spot-websocket-v2-streams.publish-instrument
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/ping/subscribe
          name: ping-subscribe
          description: REST surface for ping subscribe.
          operations:
            - method: POST
              name: subscribe-ping
              description: Receive pong response from the server.
              call: spot-websocket-v2-streams.subscribe-ping
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
        - path: /v1/streams/ping/publish
          name: ping-publish
          description: REST surface for ping publish.
          operations:
            - method: POST
              name: publish-ping
              description: Send a ping to the server.
              call: spot-websocket-v2-streams.publish-ping
              with:
                channel: rest.channel
                params: rest.params
              outputParameters:
                - type: object
                  mapping: $.
    - type: mcp
      namespace: spot-websocket-v2-streams-mcp
      port: 9090
      transport: http
      description: MCP adapter for Kraken Spot WebSocket API v2 — Streams.
      tools:
        - name: receive-ticker-snapshot-and-updates
          description: Receive ticker snapshot and updates from the server.
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.subscribe-ticker
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: subscribe-unsubscribe-ticker-channel
          description: Subscribe or unsubscribe from the ticker channel.
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.publish-ticker
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: receive-book-snapshot-and-update
          description: Receive book snapshot and update messages.
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.subscribe-book
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: subscribe-unsubscribe-book-channel
          description: Subscribe or unsubscribe from the book channel.
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.publish-book
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: receive-ohlc-snapshot-and-update
          description: Receive OHLC snapshot and update messages.
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.subscribe-ohlc
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: subscribe-unsubscribe-ohlc-channel
          description: Subscribe or unsubscribe from the ohlc channel.
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.publish-ohlc
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: receive-trade-snapshot-and-update
          description: Receive trade snapshot and update messages.
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.subscribe-trade
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: subscribe-unsubscribe-trade-channel
          description: Subscribe or unsubscribe from the trade channel.
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.publish-trade
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: receive-instrument-snapshot-and-update
          description: Receive instrument snapshot and update messages.
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.subscribe-instrument
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: subscribe-unsubscribe-instrument-channel
          description: Subscribe or unsubscribe from the instrument channel.
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.publish-instrument
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: receive-pong-response-server
          description: Receive pong response from the server.
          hints:
            readOnly: true
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.subscribe-ping
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.
        - name: send-ping-server
          description: Send a ping to the server.
          hints:
            readOnly: false
            destructive: false
            idempotent: true
          call: spot-websocket-v2-streams.publish-ping
          with:
            channel: tools.channel
            params: tools.params
          outputParameters:
            - type: object
              mapping: $.