# TiresAPI Best Price Near (Cheapest Tire Listing by Size/SKU + ZIP Radius)

> TiresAPI Best Price Near (Cheapest Tire Listing by Size/SKU + ZIP Radius) is a paid API for AI agents from tiresapi.com, paid per call via x402, $0.001/call, status unknown (last checked 2026-09-15).

Returns the cheapest tire listing for a given tire size or SKU within a specified radius of a ZIP code.

## Facts

- Endpoint: POST https://tiresapi.com/api/v1/answers/best_price_near
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/tiresapi-com-dfd8c091
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_FRHkfx8odQNL33O_m-1bZ

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 tiresapi-com-dfd8c091 -d '<json body>'
```

Example prompt: What's the cheapest price I can find on a 225/65R17 tire within 30 miles of ZIP code 90210? Give me the best deal available.

## When to prefer this

Use this endpoint when you need the single cheapest tire option for a specific size or SKU near a given location, and want a direct curated answer rather than a full inventory list. Prefer this over the inventory browse endpoint when you don't need pagination or multiple results — just the best price fast. Ideal for price-comparison agents, consumer-facing tire shopping assistants, or cost optimization workflows.

## Known failure modes

- No listings found within radius — empty result or 404
- Invalid tire size format — 400 bad request
- Invalid or unrecognized ZIP code — 400 bad request
- Radius too large or unsupported — 400 bad request
- Insufficient balance and no MPP allowance — 402 payment required
- Rate limiting or quota exceeded — 429 too many requests
- Upstream data freshness issue — stale or missing inventory

## How this service works

Curated answer: cheapest tire listing for a size or SKU within radius of a ZIP. $0.001 per call, debited from the agent's virtual USD balance FIRST. Only when the balance reaches $0 does this 402 / x402 envelope draw from the wallet's MPP allowance — wallets are never charged while credit remains.

## Output

A curated single best-price tire listing matching the requested size or SKU within the specified radius of the ZIP code, including price, retailer name, store location, and tire details.

## Example request

```json
{
 "zip_code": "90210",
 "tire_size": "225/65R17",
 "radius_miles": 30
}
```

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "properties": {
  "zip_code": {
   "type": "string",
   "pattern": "^[0-9]{5}$"
  },
  "tire_size": {
   "type": "string"
  },
  "brand_tier": {
   "type": "string",
   "description": "Optional CSV from {Best, Better, Good, Economy} (case-insensitive). Filters by fg_brand_tier; brands not in fg_brand_tier resolve to 'Economy' by contract. Discover via GET /api/v1/corpus/facets/brand-tiers."
  },
  "radius_miles": {
   "type": "integer",
   "maximum": 200,
   "minimum": 1
  },
  "key_brand_mpc": {
   "type": "string",
   "description": "base64url of the binary SKU key; alternative to tire_size."
  },
  "exclude_retailers": {
   "type": "string",
   "description": "Optional CSV of retailer_keys to drop entirely before the cheapest match is picked (case-insensitive). E.g. 'TIRERACK' for 'cheapest near me but not from Tire Rack'."
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "answer": {
   "size": "235/55R17",
   "brand": "Michelin",
   "model": "Defender T+H",
   "min_price": 142.99,
   "retailer_key": "DISCOUNTTIRE",
   "store_number": "1234",
   "key_brand_mpc": "AAECAw",
   "store_distance_miles": 4.2
  },
  "matches": [
   {
    "store_num": "1234",
    "retailer_key": "DISCOUNTTIRE",
    "single_price": 142.99,
    "store_distance_miles": 4.2
   },
   {
    "store_num": null,
    "retailer_key": "TIRERACK",
    "single_price": 158.99,
    "store_distance_miles": null
   }
  ],
  "match_count": 2
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/tiresapi-com-dfd8c091/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from tiresapi.com](https://www.zero.xyz/host/tiresapi.com/llms.txt)