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The Undesirables Oracle — Graded Slab Census
x402
The Undesirables Oracle — Graded Slab Census is a paid API for AI agents from oracle.the-undesirables.com, paid per call via x402, $0.05/call, status unknown (last checked 2026-09-15).
Returns a cert-verified, grade-by-grade count of actively listed PSA/BGS/CGC/TAG slabs on the open market for a specific trading card, with 30-day active counts and median ask prices.
Price / call$0.05
Success—
StatusUnknown
How this service works
Observed graded-slab census for a card: how many PSA/BGS/CGC/TAG slabs of each grade are circulating on the open market, with cert-number-verified depth, 30-day active counts and median asks. This is NOT a pop report — pop counts every slab ever graded (including vaulted); this census counts what is actually listed and pressing on price. Harvested daily from eBay conditionDescriptors (grader+grade are marketplace-required fields), committed on-chain daily under a census domain tag.
Output
A JSON object containing total active slab count, a breakdown by grade (PSA, BGS, CGC, TAG grades listed separately) with cert-number-verified depth per grade, 30-day active listing counts, and median ask prices per grade tier — reflecting only slabs currently listed and pressing on open-market price, not total population report counts.
Example use cases
Check PSA 10 supply before buying
“Before I make an offer on a PSA 10, can you check how many PSA 10 slabs of TCGplayer product 220145 are currently listed on the market and what the median ask is?”
Assess market saturation for flipping
“I'm thinking about submitting cards to PSA for grading — can you pull the active slab census for TCGplayer product 394821 so I can see how saturated each grade tier already is?”
Monitor high-grade slab price pressure
“Keep an eye on the graded market depth for TCGplayer product 178302 — I want to know if the number of BGS 9.5 slabs listed is creeping up and pushing down the median ask.”
Technical details
Endpoint
GEThttps://oracle.the-undesirables.com/api/v1/censusWhen to prefer
Use this endpoint when you need to understand actual market supply pressure for graded slabs of a specific card — i.e., how many certified copies are actively listed and at what prices — rather than the theoretical total graded population. Prefer this over a raw PSA/BGS pop report when making buy/sell/grade decisions based on real circulating supply. Especially valuable when assessing whether high-grade supply is thin (supporting price) or saturated (suppressing price).
Side effects
- Missing or invalid product_id returns a 400 error
- product_id not found in TCGplayer catalog returns empty or 404 response
- No active listings for that card returns zero counts with empty by_grade array
- Stale data if daily harvest has not yet completed for that day
- Payment failure via x402 micropayment returns 402 before data is delivered
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| inputrequired | object | |
| output | object |
Tags
x402
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