HMRC UK Tax Authority · Capability

HMRC VAT (Making Tax Digital) API — Returns

HMRC VAT (Making Tax Digital) API — Returns. 2 operations. Lead operation: Submit a VAT return. Self-contained Naftiko capability covering one Hmrc business surface.

Run with Naftiko HmrcReturns

What You Can Do

POST

Submitvatreturn — Submit a VAT return

/v1/organisations/vat/{vrn}/returns

GET

Getvatreturn — View a submitted VAT return

/v1/organisations/vat/{vrn}/returns/{periodkey}

MCP Tools

submit-vat-return

Submit a VAT return

view-submitted-vat-return

View a submitted VAT return

read-only idempotent

Capability Spec

naftiko: 1.0.0-alpha2
info:
  label: HMRC VAT (Making Tax Digital) API — Returns
  description: 'HMRC VAT (Making Tax Digital) API — Returns. 2 operations. Lead operation: Submit a VAT return. Self-contained
    Naftiko capability covering one Hmrc business surface.'
  tags:
  - Hmrc
  - Returns
  created: '2026-05-19'
  modified: '2026-05-19'
binds:
- namespace: env
  keys:
    HMRC_API_KEY: HMRC_API_KEY
capability:
  consumes:
  - type: http
    namespace: vat-mtd-returns
    baseUri: https://api.service.hmrc.gov.uk
    description: HMRC VAT (Making Tax Digital) API — Returns business capability. Self-contained, no shared references.
    resources:
    - name: organisations-vat-vrn-returns
      path: /organisations/vat/{vrn}/returns
      operations:
      - name: submitvatreturn
        method: POST
        description: Submit a VAT return
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: vrn
          in: path
          type: string
          required: true
        - name: Authorization
          in: header
          type: string
          required: true
        - name: Gov-Client-Connection-Method
          in: header
          type: string
          required: true
        - name: Gov-Vendor-Version
          in: header
          type: string
          required: true
        - name: body
          in: body
          type: object
          description: Request body (JSON).
          required: true
    - name: organisations-vat-vrn-returns-periodKey
      path: /organisations/vat/{vrn}/returns/{periodKey}
      operations:
      - name: getvatreturn
        method: GET
        description: View a submitted VAT return
        outputRawFormat: json
        outputParameters:
        - name: result
          type: object
          value: $.
        inputParameters:
        - name: vrn
          in: path
          type: string
          required: true
        - name: periodKey
          in: path
          type: string
          description: Period key from the obligation (e.g., "23AA")
          required: true
        - name: Authorization
          in: header
          type: string
          required: true
    authentication:
      type: bearer
      token: '{{env.HMRC_API_KEY}}'
  exposes:
  - type: rest
    namespace: vat-mtd-returns-rest
    port: 8080
    description: REST adapter for HMRC VAT (Making Tax Digital) API — Returns. One Spectral-compliant resource per consumed
      operation, prefixed with /v1.
    resources:
    - path: /v1/organisations/vat/{vrn}/returns
      name: organisations-vat-vrn-returns
      description: REST surface for organisations-vat-vrn-returns.
      operations:
      - method: POST
        name: submitvatreturn
        description: Submit a VAT return
        call: vat-mtd-returns.submitvatreturn
        with:
          vrn: rest.vrn
          Authorization: rest.Authorization
          Gov-Client-Connection-Method: rest.Gov-Client-Connection-Method
          Gov-Vendor-Version: rest.Gov-Vendor-Version
          body: rest.body
        outputParameters:
        - type: object
          mapping: $.
    - path: /v1/organisations/vat/{vrn}/returns/{periodkey}
      name: organisations-vat-vrn-returns-periodkey
      description: REST surface for organisations-vat-vrn-returns-periodKey.
      operations:
      - method: GET
        name: getvatreturn
        description: View a submitted VAT return
        call: vat-mtd-returns.getvatreturn
        with:
          vrn: rest.vrn
          periodKey: rest.periodKey
          Authorization: rest.Authorization
        outputParameters:
        - type: object
          mapping: $.
  - type: mcp
    namespace: vat-mtd-returns-mcp
    port: 9090
    transport: http
    description: MCP adapter for HMRC VAT (Making Tax Digital) API — Returns. One tool per consumed operation, routed inline
      through this capability's consumes block.
    tools:
    - name: submit-vat-return
      description: Submit a VAT return
      hints:
        readOnly: false
        destructive: false
        idempotent: false
      call: vat-mtd-returns.submitvatreturn
      with:
        vrn: tools.vrn
        Authorization: tools.Authorization
        Gov-Client-Connection-Method: tools.Gov-Client-Connection-Method
        Gov-Vendor-Version: tools.Gov-Vendor-Version
        body: tools.body
      outputParameters:
      - type: object
        mapping: $.
    - name: view-submitted-vat-return
      description: View a submitted VAT return
      hints:
        readOnly: true
        destructive: false
        idempotent: true
      call: vat-mtd-returns.getvatreturn
      with:
        vrn: tools.vrn
        periodKey: tools.periodKey
        Authorization: tools.Authorization
      outputParameters:
      - type: object
        mapping: $.