LangWatch · Capability

LangWatch Annotations API

Collaborative annotation and labeling workflows over traces. Self-contained Naftiko capability covering one LangWatch business surface.

LangWatch Annotations API is a Naftiko capability published by LangWatch, one of 20 capabilities the APIs.io network indexes for this provider. It bundles 6 operations across the GET, POST, PATCH, and DELETE methods rooted at /v1/api/annotations.

The capability includes 3 read-only operations and 3 state-changing operations. Lead operation: List annotations. Can be deployed as a REST endpoint, MCP tool, or Agent Skill via Naftiko.

Tagged areas include LangWatch, Annotations, and Labeling.

Run with Naftiko LangWatchAnnotationsLabeling

What You Can Do

GET

Listannotations — List annotations.

/v1/api/annotations

GET

Listtraceannotations — List annotations for a trace.

/v1/api/annotations/trace/{id}

POST

Createtraceannotation — Annotate a trace.

/v1/api/annotations/trace/{id}

GET

Getannotation — Retrieve an annotation.

/v1/api/annotations/{id}

PATCH

Updateannotation — Update an annotation.

/v1/api/annotations/{id}

DELETE

Deleteannotation — Delete an annotation.

/v1/api/annotations/{id}

MCP Tools

langwatch-listAnnotations

List annotations.

read-only idempotent

langwatch-listTraceAnnotations

List annotations for a trace.

read-only idempotent

langwatch-createTraceAnnotation

Annotate a trace.

langwatch-getAnnotation

Retrieve an annotation.

read-only idempotent

langwatch-updateAnnotation

Update an annotation.

langwatch-deleteAnnotation

Delete an annotation.

idempotent

Capability Spec

naftiko: 1.0.0-alpha2
info:
  label: LangWatch Annotations API
  description: 'Collaborative annotation and labeling workflows over traces. Self-contained Naftiko capability covering one LangWatch business surface.'
  tags:
  - LangWatch
  - Annotations
  - Labeling
  created: '2026-05-25'
  modified: '2026-05-25'
binds:
- namespace: env
  keys:
    LANGWATCH_API_KEY: LANGWATCH_API_KEY
capability:
  consumes:
  - type: http
    namespace: annotations
    baseUri: https://app.langwatch.ai
    description: Collaborative annotation and labeling workflows over traces.
    resources:
    - name: api-annotations
      path: /api/annotations
      operations:
      - name: listAnnotations
        method: GET
        description: List annotations.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
    - name: api-annotations-trace-id
      path: /api/annotations/trace/{id}
      operations:
      - name: listTraceAnnotations
        method: GET
        description: List annotations for a trace.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: id
          in: path
          type: string
          required: true
      - name: createTraceAnnotation
        method: POST
        description: Annotate a trace.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: id
          in: path
          type: string
          required: true
        - name: body
          in: body
          type: object
          description: Request body (JSON).
          required: false
    - name: api-annotations-id
      path: /api/annotations/{id}
      operations:
      - name: getAnnotation
        method: GET
        description: Retrieve an annotation.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: id
          in: path
          type: string
          required: true
      - name: updateAnnotation
        method: PATCH
        description: Update an annotation.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: id
          in: path
          type: string
          required: true
        - name: body
          in: body
          type: object
          description: Request body (JSON).
          required: false
      - name: deleteAnnotation
        method: DELETE
        description: Delete an annotation.
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: id
          in: path
          type: string
          required: true
    authentication:
      type: bearer
      value: '{{env.LANGWATCH_API_KEY}}'
      placement: header
  exposes:
  - type: rest
    namespace: annotations-rest
    port: 8080
    description: REST adapter for LangWatch Annotations API.
    resources:
    - path: /v1/api/annotations
      name: listannotations-resource
      description: REST surface for listAnnotations.
      operations:
      - method: GET
        name: listAnnotations
        description: List annotations.
        call: annotations.listAnnotations
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/api/annotations/trace/{id}
      name: listtraceannotations-resource
      description: REST surface for listTraceAnnotations.
      operations:
      - method: GET
        name: listTraceAnnotations
        description: List annotations for a trace.
        call: annotations.listTraceAnnotations
        with:
          id: rest.path.id
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/api/annotations/trace/{id}
      name: createtraceannotation-resource
      description: REST surface for createTraceAnnotation.
      operations:
      - method: POST
        name: createTraceAnnotation
        description: Annotate a trace.
        call: annotations.createTraceAnnotation
        with:
          id: rest.path.id
          body: rest.body
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/api/annotations/{id}
      name: getannotation-resource
      description: REST surface for getAnnotation.
      operations:
      - method: GET
        name: getAnnotation
        description: Retrieve an annotation.
        call: annotations.getAnnotation
        with:
          id: rest.path.id
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/api/annotations/{id}
      name: updateannotation-resource
      description: REST surface for updateAnnotation.
      operations:
      - method: PATCH
        name: updateAnnotation
        description: Update an annotation.
        call: annotations.updateAnnotation
        with:
          id: rest.path.id
          body: rest.body
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/api/annotations/{id}
      name: deleteannotation-resource
      description: REST surface for deleteAnnotation.
      operations:
      - method: DELETE
        name: deleteAnnotation
        description: Delete an annotation.
        call: annotations.deleteAnnotation
        with:
          id: rest.path.id
        outputParameters:
        - type: object
          mapping: $.
  - type: mcp
    namespace: annotations-mcp
    port: 9090
    transport: http
    description: MCP adapter for LangWatch Annotations API. One tool per consumed operation.
    tools:
    - name: langwatch-listAnnotations
      description: List annotations.
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: annotations.listAnnotations
      outputParameters:
      - type: object
        mapping: $.
    - name: langwatch-listTraceAnnotations
      description: List annotations for a trace.
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: annotations.listTraceAnnotations
      with:
        id: tools.id
      outputParameters:
      - type: object
        mapping: $.
    - name: langwatch-createTraceAnnotation
      description: Annotate a trace.
      hints:
        readOnly: false
        destructive: false
        idempotent: false
      call: annotations.createTraceAnnotation
      with:
        id: tools.id
        body: tools.body
      outputParameters:
      - type: object
        mapping: $.
    - name: langwatch-getAnnotation
      description: Retrieve an annotation.
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: annotations.getAnnotation
      with:
        id: tools.id
      outputParameters:
      - type: object
        mapping: $.
    - name: langwatch-updateAnnotation
      description: Update an annotation.
      hints:
        readOnly: false
        destructive: false
        idempotent: false
      call: annotations.updateAnnotation
      with:
        id: tools.id
        body: tools.body
      outputParameters:
      - type: object
        mapping: $.
    - name: langwatch-deleteAnnotation
      description: Delete an annotation.
      hints:
        readOnly: false
        destructive: true
        idempotent: true
      call: annotations.deleteAnnotation
      with:
        id: tools.id
      outputParameters:
      - type: object
        mapping: $.