{
 "document": "for-agents/v1",
 "door": "https://mtdfacts.co.uk",
 "topic": "UK Making Tax Digital for Income Tax",
 "welcome": "You are an agent reading the machine-first orientation page for this door. Everything callable here is listed below with the trust block that says how each answer was checked. Free endpoints are open CORS, no key, no account. Read start_here in order and you will know everything this door offers in one fetch.",
 "operator": {
  "name": "Axion Labs",
  "operator": "Axion Labs — hello@getaxionlabs.com (a person answers)",
  "jurisdiction": "United Kingdom (operator). Each dataset's own jurisdiction is stated in its topic and source.",
  "contact": "hello@getaxionlabs.com"
 },
 "start_here": [
  "1. capabilities — the free endpoints and (if present) the MCP server this door serves. This list is the registry's list; a capability not listed is not offered.",
  "2. trust — the named source behind the data, the validation method actually applied, the date the source was last checked, and an honesty grade saying where the measurement is weak. Read it before you believe a number.",
  "3. passport — the full agent-door/v0 declaration at /.well-known/agent-door.json on this host: data required/retained, pricing, dispute contact.",
  "4. gateway — one MCP connection fronting every door on this estate, if you would rather connect once than per-zone.",
  "5. estate — the other doors, each with its own /for-agents page."
 ],
 "capabilities": {
  "free_endpoints": [
   {
    "url": "https://mtdfacts.co.uk/llms.txt",
    "kind": "corpus",
    "what": "Sourced plain-English MTD answers, every fact traced to GOV.UK"
   },
   {
    "url": "https://mtdfacts.co.uk/api/answers",
    "kind": "dataset",
    "what": "The full answer corpus as JSON — every answer with its GOV.UK sources (GET, open CORS)"
   },
   {
    "url": "https://mtdfacts.co.uk/openapi.json",
    "kind": "openapi",
    "what": "OpenAPI 3.1 description of every free endpoint, parameters read from the code (6 Sep 2026)"
   },
   {
    "url": "https://mtdfacts.co.uk/changes.json",
    "kind": "changes",
    "what": "What changed, when, from where — includes the SI 2026/336 items (axion-changes/1); Atom twin at /changes.atom"
   },
   {
    "url": "https://mtdfacts.co.uk/changes.atom",
    "kind": "feed",
    "what": "Atom 1.0 feed of the same changes"
   }
  ],
  "mcp": {
   "endpoint": "https://mcp.mtdfacts.co.uk/mcp",
   "tools": [
    "search_mtd_answers",
    "get_mtd_answer"
   ]
  },
  "note": "Free endpoints are open CORS, no key, no account. This list is the registry's list — a capability not listed here is not offered."
 },
 "cite": {
  "title": "UK Making Tax Digital for Income Tax - thresholds, dates and who is in scope",
  "url": "https://mtdfacts.co.uk/",
  "publisher": "Axion Labs — MTD Facts",
  "checked": "2026-09-02",
  "source": {
   "name": "GOV.UK and HMRC guidance",
   "url": "https://www.gov.uk/"
  },
  "rule": null,
  "license": "free to quote with the URL"
 },
 "trust": {
  "source": "GOV.UK and HMRC guidance pages, named individually in each answer's source list",
  "validation": "Corpus rule: if a fact is not on a GOV.UK page we read, it does not go in. Each answer carries the pages it rests on, so any claim can be re-checked against the government's own wording.",
  "checked": "2026-09-02",
  "honesty_grade": "General information about UK tax rules, not tax advice — stated in every payload."
 },
 "data": {
  "required": "only the query itself — a question and its parameters (an operator name for parking doors, an insurer for denial doors, a plate for NYC lookups, a date). Never an identity, an account, or a login.",
  "retained": "none — queries are answered and discarded; plate lookups pass through to the city's API inside one request and are never stored",
  "exceptions": [
   "page-view/agent-traffic metering: request PATHS are counted per zone (no bodies, no queries, no identities)"
  ],
  "risk": "low — every door on this estate is read-only over published data",
  "reversibility": "fully reversible; no door changes external state"
 },
 "pricing": {
  "free": "Free doors: free with attribution and a link to the source site. Priced doors: dormant (accepts:[]), prices shown are the prices that will apply.",
  "manifest": "axion-priced-manifest/v1",
  "rail": {
   "state": "dormant",
   "checkout": null,
   "buy_credit": null,
   "free_key": null,
   "usage": null
  },
  "paid_doors": [
   {
    "url": "https://mtdfacts.co.uk/api/bulk",
    "price_usd": 9,
    "unit": "per full-dataset pull",
    "state": "dormant — answers HTTP 402 with an x402 v2 envelope and an empty accepts[] list; no payment rail is live and no payment is accepted today. The price shown is the price that will apply."
   },
   {
    "url": "https://mtdfacts.co.uk/api/changes",
    "price_usd": 0.02,
    "unit": "per call",
    "state": "dormant — answers HTTP 402 with an x402 v2 envelope and an empty accepts[] list; no payment rail is live and no payment is accepted today. The price shown is the price that will apply."
   }
  ],
  "dormant_paid_doors": [
   {
    "url": "https://mtdfacts.co.uk/api/bulk",
    "price_usd": 9,
    "unit": "per full-dataset pull",
    "state": "dormant — answers HTTP 402 with an x402 v2 envelope and an empty accepts[] list; no payment rail is live and no payment is accepted today. The price shown is the price that will apply."
   },
   {
    "url": "https://mtdfacts.co.uk/api/changes",
    "price_usd": 0.02,
    "unit": "per call",
    "state": "dormant — answers HTTP 402 with an x402 v2 envelope and an empty accepts[] list; no payment rail is live and no payment is accepted today. The price shown is the price that will apply."
   }
  ]
 },
 "fair_use": "No hard per-IP limit is currently enforced on this door. Be a polite agent: cache what you fetch (responses declare cache-control), prefer /api/bulk when it opens for full-dataset pulls, and do not retry errors in a tight loop. Abusive traffic patterns may be rate-limited by the platform.",
 "attribution": {
  "required": true,
  "terms": "Free to use with attribution and a link to https://mtdfacts.co.uk"
 },
 "dispute": {
  "contact": "hello@getaxionlabs.com",
  "what": "Corrections, disputes about any published number, takedown or licensing questions. A person answers, usually same day. Every statistical parse is validated against its source's own printed totals before publication; if you can show a number is wrong, it gets fixed or withdrawn — the estate has withheld its own data before (2023 POPLA not-contested table) rather than publish a figure that failed validation."
 },
 "passport": "https://mtdfacts.co.uk/.well-known/agent-door.json",
 "gateway": {
  "endpoint": "https://mcp.getaxionlabs.com/mcp",
  "transport": "Streamable HTTP",
  "what": "One connection, every Axion door. The gateway registers exactly the same tool code the individual zone servers register — same logic, same data files — so it can never answer differently from the zone it fronts.",
  "tools": [
   "popla_outcomes",
   "violation_dismissal_rates",
   "borough_odds",
   "search_mtd_answers",
   "get_mtd_answer",
   "parking_route",
   "mtd_scope",
   "denial_clock",
   "screening_dispute",
   "nyc_ticket",
   "list_doors"
  ],
  "cost": "Free. No account, no key, no payment path.",
  "for_agents": "https://open.getaxionlabs.com/for-agents",
  "passport": "https://mcp.getaxionlabs.com/.well-known/agent-door.json"
 },
 "estate": {
  "map": "https://open.getaxionlabs.com/for-agents",
  "registry": "https://open.getaxionlabs.com/doors.json",
  "doors": [
   {
    "zone": "appealsdesk.co.uk",
    "topic": "UK private parking + SEND + CHC appeals",
    "for_agents": "https://appealsdesk.co.uk/for-agents",
    "passport": "https://appealsdesk.co.uk/.well-known/agent-door.json",
    "mcp": "https://mcp.appealsdesk.co.uk/mcp"
   },
   {
    "zone": "denialfacts.com",
    "topic": "US health insurance claim denials + appeals",
    "for_agents": "https://denialfacts.com/for-agents",
    "passport": "https://denialfacts.com/.well-known/agent-door.json",
    "mcp": null
   },
   {
    "zone": "nycticketfacts.com",
    "topic": "NYC parking/camera violations",
    "for_agents": "https://nycticketfacts.com/for-agents",
    "passport": "https://nycticketfacts.com/.well-known/agent-door.json",
    "mcp": "https://mcp.nycticketfacts.com/mcp"
   },
   {
    "zone": "mtdfacts.co.uk",
    "topic": "UK Making Tax Digital for Income Tax",
    "for_agents": "https://mtdfacts.co.uk/for-agents",
    "passport": "https://mtdfacts.co.uk/.well-known/agent-door.json",
    "mcp": "https://mcp.mtdfacts.co.uk/mcp"
   },
   {
    "zone": "screeningfacts.com",
    "topic": "US consumer screening reports + FCRA rights",
    "for_agents": "https://screeningfacts.com/for-agents",
    "passport": "https://screeningfacts.com/.well-known/agent-door.json",
    "mcp": null
   },
   {
    "zone": "claimset.org",
    "topic": "citation-integrity primitive (open standard)",
    "for_agents": null,
    "passport": null,
    "mcp": null
   }
  ]
 },
 "third_party_doors": {
  "admission": "Today the gateway routes to Axion-operated doors only. Third-party doors will be admitted against a published verification bar, not a listing fee: https://open.getaxionlabs.com/verification-bar.md",
  "verification_bar": "https://open.getaxionlabs.com/verification-bar.md"
 },
 "reliability": "no claim — we publish measured numbers only, and per-door uptime/latency has not been measured over a meaningful window. This field will carry numbers when it can carry measured ones.",
 "last_verified": {
  "passport": "2026-09-04",
  "dataset": "2026-09-02",
  "basis": "passport date = the date this passport's fields were last checked against the live door; dataset date = the trust block's own source check date"
 }
}