# PropPulse Council Tax Challenge Letter Preview

> PropPulse Council Tax Challenge Letter Preview is a paid API for AI agents from proppulse.theaslangroupllc.com, paid per call via x402, $0.25/call, status unknown (last checked 2026-09-14).

Returns a verdict on whether a UK council-tax challenge letter is supportable, blocked pending risk acknowledgment, or not supportable, based on neighbor-band cluster analysis and statutory route eligibility — previewing what the paid $2 letter would contain.

## Facts

- Endpoint: GET https://proppulse.theaslangroupllc.com/api/prop/council-tax-check
- Price: $0.25/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/proppulse-council-tax-challenge-letter-preview-2076ad16
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_kfYnlAhLt7Td5XL8mgeld

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability proppulse-council-tax-challenge-letter-preview-2076ad16
```

Example prompt: Can you check whether my property at 14 Elm Road, Sheffield, S10 2GF — currently in Band D — is eligible for a council tax challenge based on my neighbors' bands, and tell me what verdict a formal challenge letter would get?

## When to prefer this

Use this endpoint when you need a fast, deterministic, rule-based assessment of UK council tax challenge viability before committing to the full $2 letter generation. It is ideal for pre-screening large volumes of properties, buyer due diligence pipelines, or letting users understand their options without cost. Prefer this over the full letter endpoint when the verdict is unknown and the user wants a preview first. No LLM inference is involved, so results are consistent and auditable.

## Known failure modes

- Property address not found or unrecognized UK postcode — returns error with no verdict
- Insufficient neighbor-band data in the cluster — may return not-supportable with low confidence
- Property outside England/Wales jurisdiction — statutory routes do not apply, returns blocked status
- Invalid or missing required parameters — returns 400-level error
- Rate limit or payment verification failure — returns 402 or 429

## How this service works

Council-tax challenge letter preview — verdict (letter_supportable / blocked-on-risk-ack / not-supportable) from the same neighbor-band cluster + statutory-route engine the $2 letter uses internally, plus exactly what the letter adds. Agent-tier price point for buyers with a $0.25 per-call cap. No LLM.

## Output

A structured verdict object containing one of three statuses — letter_supportable, blocked-on-risk-ack, or not-supportable — along with the neighbor-band cluster analysis (comparable properties in the same valuation band area), the applicable statutory route (e.g. VOA informal review or formal appeal), and a preview of exactly what content the full $2 challenge letter would add beyond this check.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "country",
  "current_band"
 ],
 "properties": {
  "country": {
   "type": "string",
   "description": "england | wales | scotland"
  },
  "current_band": {
   "type": "string",
   "description": "Your current band from gov.uk/council-tax-bands"
  },
  "neighbor_bands": {
   "type": "string",
   "description": "Comparable neighbors' bands, comma-separated (3-5)"
  },
  "physical_change": {
   "type": "string",
   "description": "true = qualifying physical/use change (split/merge/demolition/renovation)"
  },
  "band_change_date": {
   "type": "string",
   "description": "If the VOA changed the band recently"
  },
  "risk_acknowledged": {
   "type": "string",
   "description": "true = you accept the VOA warning that bands can go UP"
  },
  "became_taxpayer_date": {
   "type": "string",
   "description": "YYYY-MM-DD — within 6 months unlocks the formal statutory proposal"
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {}
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/proppulse-council-tax-challenge-letter-preview-2076ad16/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from proppulse.theaslangroupllc.com](https://www.zero.xyz/host/proppulse.theaslangroupllc.com/llms.txt)