# Grade-or-Not Trading Card ROI Decision Engine

> Grade-or-Not Trading Card ROI Decision Engine is a paid API for AI agents from oracle.the-undesirables.com, paid per call via x402, $0.1/call, status unknown (last checked 2026-09-15).

Calculates expected ROI for grading a trading card by combining AI grade prediction with PSA fee schedules and graded market values, returning a GO/NO-GO verdict with best-case, predicted, and worst-case profit scenarios.

## Facts

- Endpoint: GET https://oracle.the-undesirables.com/api/v1/grade-or-not
- Price: $0.1/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/grade-or-not-trading-card-roi-decision-engine-26d47397
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_mqNoz-gZVwtcs_PvCaobp

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 grade-or-not-trading-card-roi-decision-engine-26d47397
```

Example prompt: Should I send my Charizard Base Set card to PSA for grading using the regular service tier? I think it'll grade out around an 8 and I bought it raw for $150 — will it actually make me money?

## When to prefer this

Use this endpoint when a user wants a concrete financial verdict on whether to submit a specific trading card for PSA grading. It is uniquely suited to combine AI grade prediction, live graded market values, and PSA fee schedules into a single profit/loss calculation. Prefer this over general card price lookup when the decision context is specifically about the economics of grading.

## Known failure modes

- Card name not recognized or too ambiguous — returns error with suggestion to be more specific
- Auto-lookup of raw price fails if card has insufficient market data — recommend supplying raw_price manually
- Auto-grade estimation unavailable for obscure cards — recommend supplying predicted_grade manually
- Invalid service_tier value — returns validation error listing valid tiers
- Market data unavailable for graded version of card — GO/NO-GO cannot be computed reliably

## How this service works

Grade-or-Not Decision Engine: answers 'will grading this trading card make me money?' by combining AI grade prediction with PSA fee schedules, shipping costs, and graded market values to calculate expected ROI. Returns a clear GO/NO-GO verdict with best-case, predicted, and worst-case profit scenarios.

## Output

Returns a GO or NO-GO verdict on whether grading the card is profitable, along with three profit scenarios (best-case, predicted, worst-case), the estimated PSA fee for the selected tier, the projected graded market value, expected ROI percentage, and supporting calculation details.

## 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",
      "HEAD",
      "DELETE"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "card_name"
     ],
     "properties": {
      "card_name": {
       "type": "string",
       "description": "Card name to evaluate"
      },
      "raw_price": {
       "type": "number",
       "description": "Current raw value in USD (0 = auto-lookup)"
      },
      "service_tier": {
       "type": "string",
       "description": "PSA tier: economy, regular, express, super_express, walk_through"
      },
      "predicted_grade": {
       "type": "number",
       "description": "Expected PSA grade (0 = auto-estimate)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "required": [
      "status"
     ],
     "properties": {
      "data": {
       "type": "object"
      },
      "status": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "data": {
   "roi_pct": 85.3,
   "verdict": "🟢 GRADE IT"
  },
  "tool": "grade_or_not_engine",
  "status": "ok"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/grade-or-not-trading-card-roi-decision-engine-26d47397/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from oracle.the-undesirables.com](https://www.zero.xyz/host/oracle.the-undesirables.com/llms.txt)