{
  "apiVersion": "1",
  "licence": {
    "name": "Creative Commons Attribution 4.0 International (CC BY 4.0)",
    "url": "https://creativecommons.org/licenses/by/4.0/",
    "attribution": "Acrenvo, https://acrenvo.com/open-data"
  },
  "lastUpdated": "2026-09-26",
  "name": "Acrenvo open data: MTD for Income Tax software",
  "publisher": "Acrenvo",
  "documentation": "https://acrenvo.com/open-data",
  "versioning": "Version 1 fields are never removed or renamed; new fields may be added. A breaking change would add /api/v2 and leave /api/v1 in place.",
  "endpoints": [
    {
      "path": "/api/v1/index.json",
      "url": "https://acrenvo.com/api/v1/index.json",
      "description": "This catalogue: the API version, licence and list of endpoints."
    },
    {
      "path": "/api/v1/products.json",
      "url": "https://acrenvo.com/api/v1/products.json",
      "description": "Every tracked product with its verified plans, prices, features and HMRC product number."
    },
    {
      "path": "/api/v1/products/{id}.json",
      "url": "https://acrenvo.com/api/v1/products/{id}.json",
      "description": "One product, by the id used in products.json."
    },
    {
      "path": "/api/v1/changes.json",
      "url": "https://acrenvo.com/api/v1/changes.json",
      "description": "The dated, append-only record of verified price and plan changes."
    },
    {
      "path": "/api/v1/price-index.json",
      "url": "https://acrenvo.com/api/v1/price-index.json",
      "description": "The quarterly summary of paid entry prices, in integer pence."
    },
    {
      "path": "/api/v1/recognition.json",
      "url": "https://acrenvo.com/api/v1/recognition.json",
      "description": "When each product first appeared in, and left, HMRC's software list data."
    }
  ]
}