# Card Comps — x402

> Card Comps — x402 is a paid API for AI agents from eager-marvel-a2g2.here.now, paid per call via x402, $0.01/call, status unknown (last checked 2026-09-14).

Returns sports card market deal alerts showing listings priced significantly below median market value, filterable by discount threshold and result count.

## Facts

- Endpoint: GET https://eager-marvel-a2g2.here.now/deals
- Price: $0.01/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/card-comps-x402-982762ad
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_w5YXMkdXp0PWqg1Yy189m

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 card-comps-x402-982762ad
```

Example prompt: Show me up to 30 sports card deals where the listing price is at least 10% below the median market value — I'm looking for flip opportunities.

## When to prefer this

Use this endpoint when you need real-time sports card deal discovery based on price-vs-median analysis, especially for identifying flip or arbitrage opportunities. It's ideal when you want ranked, filtered results with flip scores and slab prices rather than raw price history or general card lookup. Prefer this over general sports card search APIs when the goal is specifically identifying underpriced listings.

## Known failure modes

- Invalid limit value outside 1–40 range returns an error or default
- Invalid min_pct value outside -80 to 0 range returns an error or default
- Payment not processed (x402 payment failure) returns 402 with no data
- No deals match the filter criteria — empty items array returned
- Service temporarily unavailable returns 5xx error

## How this service works

A pay per call service providing sports card market research data on the Base network.

## Output

A JSON object with a list of deal items, each containing the card name, player, category, last raw sale price and date, 7-day sale count, raw median price, a flip score, the slab (PSA 10) price, a percentage discount vs median (vs_median_pct), velocity delta, an alert flag, and a link to the PriceCharting product page. Also returns the applied min_pct filter and total count returned.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "properties": {
      "limit": {
       "type": "number",
       "description": "Max deals to return, 1-40. Default 20."
      },
      "min_pct": {
       "type": "number",
       "description": "Maximum vs_median_pct to include, -80 to 0. Default 0 (at or below median). Example -5 means at least 5% below median."
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "paid": true,
  "items": [
   {
    "card": "Julio Rodriguez #222 [Rookie] 2022 Topps Chrome",
    "alert": true,
    "player": "Julio Rodriguez",
    "slab10": 1750,
    "last_7d": 0,
    "category": "baseball",
    "last_raw": 151.99,
    "flip_score": 119.6,
    "raw_median": 675,
    "mult_10_raw": 2.59,
    "product_url": "https://www.pricecharting.com/game/baseball-cards-2022-topps-chrome/julio-rodriguez-222",
    "last_raw_date": "2026-07-31",
    "vs_median_pct": -77.5,
    "velocity_delta_7d": 0
   }
  ],
  "min_pct": -5,
  "returned": 1
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/card-comps-x402-982762ad/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from eager-marvel-a2g2.here.now](https://www.zero.xyz/host/eager-marvel-a2g2.here.now/llms.txt)