> ## Documentation Index
> Fetch the complete documentation index at: https://docs.watchdog.no/llms.txt
> Use this file to discover all available pages before exploring further.

# Add a matched invoice

> Matches a credit note with an invoice or self-billed invoice; call it on either one. Both must be active. Supplier and currency may differ. Repeating a match changes nothing, and an existing automatic match becomes manual.



## OpenAPI

````yaml /openapi-preview.json post /v1/invoices/{id}/matched-invoices
openapi: 3.1.0
info:
  title: Watchdog API
  version: 1.0.0
  description: >-
    The Watchdog API is served from https://api-canary.watchdog.no until it
    moves to https://api.watchdog.no. Request bodies are limited to 2 MiB unless
    an endpoint says otherwise. Files are uploaded directly to storage, not
    through the API.
servers:
  - url: https://api-canary.watchdog.no
    description: Watchdog API
security: []
paths:
  /v1/invoices/{id}/matched-invoices:
    post:
      tags:
        - Invoices
      summary: Add a matched invoice
      description: >-
        Matches a credit note with an invoice or self-billed invoice; call it on
        either one. Both must be active. Supplier and currency may differ.
        Repeating a match changes nothing, and an existing automatic match
        becomes manual.
      operationId: addMatchedInvoice
      parameters:
        - name: X-Organization-Id
          in: header
          required: false
          schema:
            type: string
          description: >-
            The organization to act in. Required for personal API keys; list the
            organizations you can access with GET /v1/organizations.
        - schema:
            type: string
            format: uuid
          required: true
          name: id
          in: path
      requestBody:
        required: true
        content:
          application/json:
            schema:
              type: object
              properties:
                invoice_id:
                  type: string
                  format: uuid
              required:
                - invoice_id
              additionalProperties: false
      responses:
        '200':
          description: The manual match.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/MatchedInvoice'
        '400':
          description: Invalid match, for example an invoice matched to itself.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_validation_error'
              example:
                error:
                  code: validation_error
                  message: Invalid match, for example an invoice matched to itself.
                  request_id: req_example
        '401':
          description: The bearer token is missing or invalid.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
            WWW-Authenticate:
              schema:
                type: string
              required: false
              description: Bearer authentication challenge, when supplied.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_invalid_token'
              example:
                error:
                  code: invalid_token
                  message: The bearer token is missing or invalid.
                  request_id: req_example
        '403':
          description: >-
            Access denied. The error code says why: forbidden, token_disabled,
            organization_required, insufficient_role or mfa_required.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
          content:
            application/json:
              schema:
                $ref: >-
                  #/components/schemas/Error_forbidden_token_disabled_organization_required_insufficient_role_mfa_required
              example:
                error:
                  code: forbidden
                  message: >-
                    Access denied. The error code says why: forbidden,
                    token_disabled, organization_required, insufficient_role or
                    mfa_required.
                  request_id: req_example
        '404':
          description: The resource does not exist in the current organization.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_not_found'
              example:
                error:
                  code: not_found
                  message: The resource does not exist in the current organization.
                  request_id: req_example
        '409':
          description: >-
            The invoices cannot be matched (both must be active, and one must be
            a credit note), or a concurrent change interfered; retry.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_conflict'
              example:
                error:
                  code: conflict
                  message: >-
                    The invoices cannot be matched (both must be active, and one
                    must be a credit note), or a concurrent change interfered;
                    retry.
                  request_id: req_example
        '429':
          description: Too many requests. Wait for the Retry-After delay before retrying.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
            Retry-After:
              schema:
                type: string
                example: '60'
              required: true
              description: Seconds to wait before retrying the request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_rate_limit_exceeded'
              example:
                error:
                  code: rate_limit_exceeded
                  message: >-
                    Too many requests. Wait for the Retry-After delay before
                    retrying.
                  request_id: req_example
        '500':
          description: >-
            Unexpected server failure. Include the request ID when contacting
            support.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_internal_error'
              example:
                error:
                  code: internal_error
                  message: >-
                    Unexpected server failure. Include the request ID when
                    contacting support.
                  request_id: req_example
        '503':
          description: >-
            Temporarily unavailable. Retry after the Retry-After delay, when
            provided.
          headers:
            X-Request-Id:
              schema:
                type: string
              required: true
              description: >-
                Request ID, also included in error bodies. Include it when
                contacting support.
            Cache-Control:
              schema:
                type: string
                enum:
                  - private, no-store
                  - private, no-store, no-transform
              required: false
              description: API responses are private and must not be cached.
            X-RateLimit-Limit:
              schema:
                type: string
                example: '500'
              required: false
              description: >-
                Requests allowed per minute for this credential, or failed API
                key attempts allowed per minute from this IP address.
            Retry-After:
              schema:
                type: string
                example: '60'
              required: true
              description: Seconds to wait before retrying the request.
          content:
            application/json:
              schema:
                $ref: '#/components/schemas/Error_service_unavailable'
              example:
                error:
                  code: service_unavailable
                  message: >-
                    Temporarily unavailable. Retry after the Retry-After delay,
                    when provided.
                  request_id: req_example
      security:
        - ApiKeyBearer: []
components:
  schemas:
    MatchedInvoice:
      type: object
      properties:
        id:
          type: string
          format: uuid
        invoice:
          type: object
          properties:
            id:
              type: string
              format: uuid
            invoice_number:
              type:
                - string
                - 'null'
            title:
              type:
                - string
                - 'null'
            category:
              type: string
              enum:
                - invoice
                - credit_note
                - self_billed_invoice
            issued_date:
              type:
                - string
                - 'null'
              format: date
            currency_code:
              type:
                - string
                - 'null'
            total_amount_including_vat:
              type:
                - string
                - 'null'
            total_amount_excluding_vat:
              type:
                - string
                - 'null'
            supplier_name:
              type:
                - string
                - 'null'
              description: The supplier's current name.
            deleted_at:
              type:
                - string
                - 'null'
              format: date-time
          required:
            - id
            - invoice_number
            - title
            - category
            - issued_date
            - currency_code
            - total_amount_including_vat
            - total_amount_excluding_vat
            - supplier_name
            - deleted_at
        match_type:
          type: string
        created_at:
          type: string
          format: date-time
        active:
          type: boolean
      required:
        - id
        - invoice
        - match_type
        - created_at
        - active
    Error_validation_error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - validation_error
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_invalid_token:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - invalid_token
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_forbidden_token_disabled_organization_required_insufficient_role_mfa_required:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - forbidden
                - token_disabled
                - organization_required
                - insufficient_role
                - mfa_required
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_not_found:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - not_found
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_conflict:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - conflict
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_rate_limit_exceeded:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - rate_limit_exceeded
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_internal_error:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - internal_error
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
    Error_service_unavailable:
      type: object
      properties:
        error:
          type: object
          properties:
            code:
              type: string
              enum:
                - service_unavailable
            message:
              type: string
            request_id:
              type: string
            description:
              type: string
            details:
              type: array
              items:
                type: object
                properties:
                  code:
                    type: string
                  field:
                    type: string
                  message:
                    type: string
                required:
                  - code
                  - field
                  - message
              maxItems: 20
            workflow_run_id:
              type: string
              format: uuid
            import_id:
              type: string
              format: uuid
            existing_party:
              type: object
              properties:
                type:
                  type: string
                  enum:
                    - supplier
                    - recipient
                id:
                  type: string
                  format: uuid
              required:
                - type
                - id
          required:
            - code
            - message
            - request_id
      required:
        - error
  securitySchemes:
    ApiKeyBearer:
      type: http
      scheme: bearer
      description: >-
        Personal API key sent as a bearer token, together with
        X-Organization-Id. The key must have at least the access level the
        endpoint requires (read, write or admin).

````