Kroki Diagram API — Diagrams

naftiko: 1.0.0-alpha2
info:
  label: Kroki Diagram API — Diagrams
  description: 'Kroki Diagram API — Diagrams. 2 operations. Lead operation: Post Diagram for Rendering. Self-contained Naftiko
    capability covering one Uml business surface.'
  tags:
  - Uml
  - Diagrams
  created: '2026-05-19'
  modified: '2026-05-19'
binds:
- namespace: env
  keys:
    UML_API_KEY: UML_API_KEY
capability:
  consumes:
  - type: http
    namespace: kroki-diagrams
    baseUri: https://kroki.io
    description: Kroki Diagram API — Diagrams business capability. Self-contained, no shared references.
    resources:
    - name: diagram_type-output_format
      path: /{diagram_type}/{output_format}
      operations:
      - name: postdiagram
        method: POST
        description: Post Diagram for Rendering
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: diagram_type
          in: path
          type: string
          description: 'The type of diagram to generate. Supported types: plantuml, mermaid, graphviz, blockdiag, seqdiag,
            actdiag, nwdiag, bpmn, c4plantuml, d2, ditaa, erd, excalidraw'
          required: true
        - name: output_format
          in: path
          type: string
          description: Output format for the diagram (svg, png, jpeg, pdf)
          required: true
        - name: body
          in: body
          type: object
          description: Request body (JSON).
          required: true
    - name: diagram_type-output_format-encoded_diagram
      path: /{diagram_type}/{output_format}/{encoded_diagram}
      operations:
      - name: getdiagramget
        method: GET
        description: Get Diagram via GET
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: diagram_type
          in: path
          type: string
          description: 'The type of diagram to generate. Supported types: plantuml, mermaid, graphviz, blockdiag, seqdiag,
            actdiag, nwdiag, packetdiag, rackdiag, bpmn, bytefield, c4pla'
          required: true
        - name: output_format
          in: path
          type: string
          description: 'Output format for the diagram. Supported formats: svg, png, jpeg, pdf (availability depends on diagram
            type)'
          required: true
        - name: encoded_diagram
          in: path
          type: string
          description: Deflate + base64url encoded diagram source text
          required: true
  exposes:
  - type: rest
    namespace: kroki-diagrams-rest
    port: 8080
    description: REST adapter for Kroki Diagram API — Diagrams. One Spectral-compliant resource per consumed operation, prefixed
      with /v1.
    resources:
    - path: /v1/{diagram-type}/{output-format}
      name: diagram-type-output-format
      description: REST surface for diagram_type-output_format.
      operations:
      - method: POST
        name: postdiagram
        description: Post Diagram for Rendering
        call: kroki-diagrams.postdiagram
        with:
          diagram_type: rest.diagram_type
          output_format: rest.output_format
          body: rest.body
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/{diagram-type}/{output-format}/{encoded-diagram}
      name: diagram-type-output-format-encoded-diagram
      description: REST surface for diagram_type-output_format-encoded_diagram.
      operations:
      - method: GET
        name: getdiagramget
        description: Get Diagram via GET
        call: kroki-diagrams.getdiagramget
        with:
          diagram_type: rest.diagram_type
          output_format: rest.output_format
          encoded_diagram: rest.encoded_diagram
        outputParameters:
        - type: object
          mapping: $.
  - type: mcp
    namespace: kroki-diagrams-mcp
    port: 9090
    transport: http
    description: MCP adapter for Kroki Diagram API — Diagrams. One tool per consumed operation, routed inline through this
      capability's consumes block.
    tools:
    - name: post-diagram-rendering
      description: Post Diagram for Rendering
      hints:
        readOnly: false
        destructive: false
        idempotent: false
      call: kroki-diagrams.postdiagram
      with:
        diagram_type: tools.diagram_type
        output_format: tools.output_format
        body: tools.body
      outputParameters:
      - type: object
        mapping: $.
    - name: get-diagram-get
      description: Get Diagram via GET
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: kroki-diagrams.getdiagramget
      with:
        diagram_type: tools.diagram_type
        output_format: tools.output_format
        encoded_diagram: tools.encoded_diagram
      outputParameters:
      - type: object
        mapping: $.