Endpoint · market dataGETunderground.substratesymposium.com /buy/catalog
Underground Cultural District — catalog of 228 themed digital products (poetry, philosophy, fiction, reflection, plant meditations).
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Underground Cultural District — catalog of 228 themed digital products (poetry, philosophy, fiction, reflection, plant meditations). One settle returns the full menu with every product's slug, description, price, and x402 endpoint. Each individual product is its own indexable x402 route. The catalog is the doorway.Overview
Grade?
UNRATED
0 of 30 paid calls toward a letter
Price
$0.01 per call
Paid calls
none yet
delivery unknown until someone pays
More info
Seller?
URL
https://underground.substratesymposium.com/buy/catalog
Seen
first 34 days ago · last 7 days ago
64 free handshakes
Payment
Pays through
x402
Offered on?
Base USDC, Solana
Listed on?
Base, Solana
Score, from free handshakes onlyweights 2026.09.6
UN
RATED
RATED
0.754 liveness verified, no letter
To a letter · 30 paid calls
0 of 30
Held back by sample size, not by the seller · gap to 1.000 is 0.246: 0.149 uncertain ? + 0.097 short ? · 0.046 to B
| Component | Weight | Measured | Lower bound ? | Adds | Short ? | Uncertain ? | |
|---|---|---|---|---|---|---|---|
| latency p95costs the most it answered as fast as its class |
0.20 | 0.52 | 0.094 | 0.019 | −0.097 | −0.085 | |
| liveness it answered at all |
0.60 | 1.00 | 0.892 | 0.535 | 0 | −0.065 | |
| price stability the price stayed where it was listed |
0.20 | 1.00 | 1.000 | 0.200 | 0 | 0 | |
| Composite | 1.00 | 0.754 | gap to 1.000 = 0.246 · 0.097 short · 0.149 uncertain | 0.754 | −0.097 | −0.149 |
Not measured: correctness · nobody paid; honesty · nobody paid; schema conformance · no answer had a published shape to check
The multiplication, written out
0.200 × 0.094 latency p95
+ 0.600 × 0.892 liveness
+ 0.200 × 1.000 price stability
= 0.754 → UNRATED: 57 of 30 paid calls weights 2026.09.6 · 57 samples · seed cap_01M1A59ZG64WZER3SZSPT1SXHZ|2026-08-30T16:36:09.840Z|2026.09.6
Verify it yourself
npx teppi-check https://underground.substratesymposium.com/buy/catalogcurl -s https://api.teppi.xyz/v1/trust/cap_01M1A59ZG64WZER3SZSPT1SXHZ