# CollectablesPulse Population Report & Grade Scarcity Lookup

> CollectablesPulse Population Report & Grade Scarcity Lookup is a paid API for AI agents from collectablespulse.theaslangroupllc.com, paid per call via x402, $0.08/call, status unknown (last checked 2026-09-14).

Looks up PSA, PCGS, and CGC census population data for graded cards, coins, and comics — returning counts at each grade, pop-higher totals, and scarcity analysis.

## Facts

- Endpoint: GET https://collectablespulse.theaslangroupllc.com/api/collect/population
- Price: $0.08/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/collectablespulse-population-report-grade-scarcity-lookup-73fd93d6
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_zpvN-Rb6jIOlseElvmS57

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 collectablespulse-population-report-grade-scarcity-lookup-73fd93d6
```

Example prompt: How many PSA 10 copies of a 2003 LeBron James Topps Chrome rookie card exist, and how does that compare to PSA 9s — is a PSA 10 actually scarce?

## When to prefer this

Use this endpoint when you need raw population and scarcity data from official grading service censuses (PSA, PCGS, CGC) for cards, coins, or comics — especially when a collector or investor agent needs to verify true rarity before buying, selling, or pricing a graded collectible. Prefer this over the investment signal endpoint when you specifically want census numbers and grade distribution rather than a buy/hold/sell recommendation.

## Known failure modes

- Item not found in census — returns empty population or error if the collectible is too obscure or unlisted
- Invalid grading service specified — returns error if PSA/PCGS/CGC is mismatched to item type (e.g. PCGS for a comic)
- Ambiguous item identifier — if the card/coin/comic description is insufficiently specific, may return wrong item or no result
- Census data stale — population data may lag behind the most recent grading service updates
- Payment failure — x402 payment of $0.08 USDC not processed, returns 402 error

## How this service works

Population report & grade scarcity: PSA/PCGS/CGC census lookup for any graded card, coin or comic. Returns how many exist at each grade, pop-with-higher, and scarcity analysis to gauge true rarity. Worldwide. For collector and investor agents.

## Output

Returns a breakdown of how many copies of the collectible have been graded at each grade level by the specified grading service (PSA/PCGS/CGC), the count of copies graded higher than any given level (pop-higher), and a scarcity analysis indicating true rarity relative to the overall population.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "item"
 ],
 "properties": {
  "item": {
   "type": "string",
   "description": "Collectible description (e.g. 1952 Topps Mickey Mantle)"
  },
  "lang": {
   "type": "string",
   "description": "Response language (default en)"
  }
 }
}
```

## Response schema (JSON Schema)

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

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/collectablespulse-population-report-grade-scarcity-lookup-73fd93d6/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from collectablespulse.theaslangroupllc.com](https://www.zero.xyz/host/collectablespulse.theaslangroupllc.com/llms.txt)