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Re:TCG Appraise

https://www.retcg.xyz/api/appraise/pokemon:sv3pt5-199
● healthy data

Raw and graded trading-card appraisals for $0.02 a call, paid in USDC on Arc, Base, Polygon or Solana (x402). One call returns every condition of a Pokémon card — raw, and every PSA/BGS/CGC/SGC grade — in USD, EUR, USDC, EURC, GBP, JPY, ETH, SOL and BTC, each figure with its source, sample size and dates; the set's lifecycle phase, 30-day momentum and drift; projections at 30/90/180/365 days; PnL net of eBay, TCGplayer, Mercari and Cardmarket fees; break-even; EIP-712 signed. No basis, no number.

Category
data
Chains
eip155:5042, base, polygon, solana
Price
$0.0200 USDC / call

Quality grade

How grading works
B 61.6 / 100
Availability 20.0 / 20
Endpoint responded (HTTP 402)
Payability 14.0 / 15
  • ✓ Answers a real HTTP 402 challenge
  • ✓ Publishes a /.well-known/x402 descriptor
  • ✓ Payment address on record
  • ✓ Settlement network declared
  • ✗ Price declared
Demand 5.7 / 35
2 distinct payers, 4 USDC transfers in the last 30 days
Performance 9.9 / 10
Last probe answered in 223 ms (full marks at 200 ms or less)
Readiness 12.0 / 15
Agent readiness 80/100
Owner verified 0.0 / 5
Nobody has claimed this listing yet
Endpoint last checked 18 h ago. On-chain activity last read 3 d ago. Availability and on-chain demand are both re-probed daily; the grade updates automatically on the next pass. This grade sets search order and leaderboards; the readiness score below is shown for reference only.

x402 readiness

B · 80/100

Readiness is how fully this listing follows its protocol and how it behaved in our probes over 30 days. It is shown for reference and does not move it in search. Search order and leaderboards use the separate quality grade (here B, 61.6/100), which weighs availability, payability and on-chain demand. How the two differ

Valid payment requirements 9/10 Findings: missing: price declared.
  • missing: price declared
Live 402 challenge 25/25 Paid endpoint answers with an HTTP 402 challenge (223 ms).
x402 version n/a x402 version not observed yet.
Signed descriptor n/a No x402 standard defines a signed descriptor.
Uptime (30 days) 15/15 32/32 probes succeeded over 30 days (100%).
Resource declaration 5/10 Declares 2 paid resource(s).
Verified identity 5/10 Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
Freshness + modern flags 1/5 not seen in a source for over 30 days; declares x402.
Security declaration n/a Payment is the access control for an x402 resource.
Applicable criteria total 75 points, scaled to 100.
Responsiveness: Responsive (223 ms; bands ≤2.5 s, ≤5 s, ≤8 s, slower; penalty only).
Payment evidence: x402_challenge — We sent a request and got a live HTTP 402 challenge. Also: x402_manifest, catalog_listing. Qualifies the payment claim; adds no points.
Measured 2026-11-11.
Nine criteria, the same as the A2A readiness score, read from our daily probe of the paid endpoint, its payment requirements and 30-day probe history. Signed descriptor and security declaration are n/a for x402 (payment is the access control), as is an x402 version we have not observed; the remaining points are scaled to 100. Grades: A>=90, B>=75, C>=60, D>=40, F<40. It also feeds 15 points of the x402 quality grade.

Compared with peers

Against 10,082 reachable x402 APIs in our daily snapshot (2026-11-12 06:46 UTC). Display only; it does not change search order.

Readiness
Higher than 55% of peers
This listing 80 · peer median 78
Latency
Faster than 46% of peers
This listing 223 ms · peer median 205 ms

Where it loses the most points, and how to win them back

  • Resource declaration −5 — Declare each paid resource with its input and output schema.
    Now: Declares 2 paid resource(s).
  • Verified identity −5 — Claim the listing and prove control of its domain.
    Now: Publisher descriptor (/.well-known/x402 or OpenAPI) on record; claim this listing to verify domain control.
  • Freshness + modern flags −4 — Keep the listing current in the registry or source it comes from.
    Now: not seen in a source for over 30 days; declares x402.

How many agent tools actually work · All statistics

Paid endpoints

2 resource(s) advertised by this origin. Each price below is that resource's own x402 price; the headline price is the range across them.

https://www.retcg.xyz/api/appraise/pokemon:sv3pt5-199
https://www.retcg.xyz/api/appraise/pokemon:swsh7-215

How to call

cURL · x402-fetch / x402-axios will auto-handle 402
curl -sS -i -X GET https://www.retcg.xyz/api/appraise/pokemon:sv3pt5-199  # expect HTTP 402 Payment Required (about 0.02 USDC/call)
/.well-known/x402.json
https://www.retcg.xyz/.well-known/x402

Listed in

Directories this entry was found in.

submission since 2026-09-20 x402scan since 2026-09-21