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CollectablesPulse Population Report & Grade Scarcity Lookup
x402
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 2026-10-28).
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.
Price / call$0.08
Success—
StatusUnknown
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.
Example use cases
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?”
Technical details
Endpoint
GEThttps://collectablespulse.theaslangroupllc.com/api/collect/population?utm_source=zero.xyzWhen to prefer
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.
Side effects
- 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
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Output
Schema · Response
{
"type": "json",
"errors": {
"400": {
"example": {
"error": "item parameter required"
},
"description": "Invalid or missing parameter(s) — required: item. Returned before the payment gate on paid requests, so a malformed call is never charged. JSON body: { error: <what is wrong and how to fix it> } plus usage hints."
},
"402": {
"description": "Payment required — x402 v2 challenge; the accepts array lists scheme, network, and amount. Retry the same request with a PAYMENT-SIGNATURE (v2) or X-PAYMENT (v1) header. Verification is free."
},
"500": {
"example": {
"error": "upstream_failed"
},
"description": "Unexpected server error. If a payment settled without a usable result, contact info@theaslangroupllc.com with the settlement tx hash for a re-run or credit."
}
}
}Tags
x402
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