underground.substratesymposium.com

https://underground.substratesymposium.com/buy/catalog

Shares a payout wallet with 10 other endpoints — its adoption is attributed from that shared wallet's traffic, not earned exclusively.

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.

62
reliability

Reliability & health

Uptime and response time from our own unpaid probes, plus the reliability score built from them.

7 days 30 days

Uptime

100.0% avg
0% 50% 100% Fri 3 AMSun 10 AMTue 5 PMFri 1 AM

Response time

p50 21ms · p95 24ms
0ms 50ms 100ms Fri 3 AMSun 10 AMTue 5 PMFri 1 AM
Data table
Reliability history per time bucket over the last 7 days (hourly).
Bucket Uptime Probes Response time
8/14/2026, 3:00:00 AM 100% 1 22ms
8/14/2026, 4:00:00 AM 100% 1 21ms
8/14/2026, 5:00:00 AM 100% 1 19ms
8/14/2026, 6:00:00 AM 100% 1 20ms
8/14/2026, 7:00:00 AM 100% 1 22ms
8/14/2026, 9:00:00 AM 100% 1 22ms
8/14/2026, 10:00:00 AM 100% 1 22ms
8/14/2026, 11:00:00 AM 100% 1 23ms
8/14/2026, 12:00:00 PM 100% 1 20ms
8/14/2026, 1:00:00 PM 100% 1 20ms
8/14/2026, 3:00:00 PM 100% 1 19ms
8/14/2026, 4:00:00 PM 100% 1 20ms
8/14/2026, 5:00:00 PM 100% 1 21ms
8/14/2026, 6:00:00 PM 100% 1 19ms
8/14/2026, 7:00:00 PM 100% 1 20ms
8/14/2026, 8:00:00 PM 100% 1 24ms
8/14/2026, 10:00:00 PM 100% 1 22ms
8/14/2026, 11:00:00 PM 100% 1 20ms
8/15/2026, 12:00:00 AM 100% 1 19ms
8/15/2026, 1:00:00 AM 100% 1 19ms
8/15/2026, 2:00:00 AM 100% 1 20ms
8/15/2026, 3:00:00 AM 100% 1 21ms
8/15/2026, 4:00:00 AM 100% 1 21ms
8/15/2026, 6:00:00 AM 100% 1 21ms
8/15/2026, 7:00:00 AM 100% 1 21ms
8/15/2026, 8:00:00 AM 100% 1 19ms
8/15/2026, 9:00:00 AM 100% 1 19ms
8/15/2026, 10:00:00 AM 100% 1 22ms
8/15/2026, 11:00:00 AM 100% 1 22ms
8/15/2026, 12:00:00 PM 100% 1 21ms
8/15/2026, 2:00:00 PM 100% 1 22ms
8/15/2026, 3:00:00 PM 100% 1 19ms
8/15/2026, 4:00:00 PM 100% 1 21ms
8/15/2026, 5:00:00 PM 100% 1 20ms
8/15/2026, 6:00:00 PM 100% 1 18ms
8/15/2026, 7:00:00 PM 100% 1 21ms
8/15/2026, 8:00:00 PM 100% 1 21ms
8/15/2026, 10:00:00 PM 100% 1 22ms
8/15/2026, 11:00:00 PM 100% 1 18ms
8/16/2026, 12:00:00 AM 100% 1 23ms
8/16/2026, 1:00:00 AM 100% 1 21ms
8/16/2026, 2:00:00 AM 100% 1 22ms
8/16/2026, 3:00:00 AM 100% 1 23ms
8/16/2026, 5:00:00 AM 100% 1 19ms
8/16/2026, 6:00:00 AM 100% 1 19ms
8/16/2026, 7:00:00 AM 100% 1 19ms
8/16/2026, 8:00:00 AM 100% 1 24ms
8/16/2026, 9:00:00 AM 100% 1 19ms
8/16/2026, 10:00:00 AM 100% 1 20ms
8/16/2026, 12:00:00 PM 100% 1 23ms
8/16/2026, 1:00:00 PM 100% 1 22ms
8/16/2026, 2:00:00 PM 100% 1 21ms
8/16/2026, 3:00:00 PM 100% 1 23ms
8/16/2026, 4:00:00 PM 100% 1 21ms
8/16/2026, 5:00:00 PM 100% 1 21ms
8/16/2026, 7:00:00 PM 100% 1 21ms
8/16/2026, 8:00:00 PM 100% 1 21ms
8/16/2026, 9:00:00 PM 100% 1 21ms
8/16/2026, 10:00:00 PM 100% 1 21ms
8/16/2026, 11:00:00 PM 100% 1 20ms
8/17/2026, 12:00:00 AM 100% 1 18ms
8/17/2026, 2:00:00 AM 100% 1 23ms
8/17/2026, 3:00:00 AM 100% 1 23ms
8/17/2026, 4:00:00 AM 100% 1 22ms
8/17/2026, 5:00:00 AM 100% 1 21ms
8/17/2026, 6:00:00 AM 100% 1 22ms
8/17/2026, 7:00:00 AM 100% 1 19ms
8/17/2026, 9:00:00 AM 100% 1 18ms
8/17/2026, 10:00:00 AM 100% 1 20ms
8/17/2026, 11:00:00 AM 100% 1 23ms
8/17/2026, 12:00:00 PM 100% 1 20ms
8/17/2026, 1:00:00 PM 100% 1 22ms
8/17/2026, 2:00:00 PM 100% 1 23ms
8/17/2026, 4:00:00 PM 100% 1 21ms
8/17/2026, 5:00:00 PM 100% 1 22ms
8/17/2026, 6:00:00 PM 100% 1 25ms
8/17/2026, 7:00:00 PM 100% 1 22ms
8/17/2026, 8:00:00 PM 100% 1 19ms
8/17/2026, 9:00:00 PM 100% 1 21ms
8/17/2026, 11:00:00 PM 100% 1 20ms
8/18/2026, 12:00:00 AM 100% 1 20ms
8/18/2026, 1:00:00 AM 100% 1 21ms
8/18/2026, 2:00:00 AM 100% 1 19ms
8/18/2026, 3:00:00 AM 100% 1 21ms
8/18/2026, 4:00:00 AM 100% 1 21ms
8/18/2026, 6:00:00 AM 100% 1 21ms
8/18/2026, 7:00:00 AM 100% 1 19ms
8/18/2026, 8:00:00 AM 100% 1 21ms
8/18/2026, 9:00:00 AM 100% 1 20ms
8/18/2026, 10:00:00 AM 100% 1 20ms
8/18/2026, 11:00:00 AM 100% 1 22ms
8/18/2026, 1:00:00 PM 100% 1 19ms
8/18/2026, 2:00:00 PM 100% 1 19ms
8/18/2026, 3:00:00 PM 100% 1 22ms
8/18/2026, 4:00:00 PM 100% 1 25ms
8/18/2026, 5:00:00 PM 100% 1 21ms
8/18/2026, 6:00:00 PM 100% 1 21ms
8/18/2026, 8:00:00 PM 100% 1 20ms
8/18/2026, 9:00:00 PM 100% 1 21ms
8/18/2026, 10:00:00 PM 100% 1 22ms
8/18/2026, 11:00:00 PM 100% 1 23ms
8/19/2026, 12:00:00 AM 100% 1 22ms
8/19/2026, 1:00:00 AM 100% 1 20ms
8/19/2026, 3:00:00 AM 100% 1 21ms
8/19/2026, 4:00:00 AM 100% 1 19ms
8/19/2026, 5:00:00 AM 100% 1 20ms
8/19/2026, 6:00:00 AM 100% 1 19ms
8/19/2026, 7:00:00 AM 100% 1 20ms
8/19/2026, 8:00:00 AM 100% 1 19ms
8/19/2026, 10:00:00 AM 100% 1 23ms
8/19/2026, 11:00:00 AM 100% 1 21ms
8/19/2026, 12:00:00 PM 100% 1 21ms
8/19/2026, 1:00:00 PM 100% 1 20ms
8/19/2026, 2:00:00 PM 100% 1 19ms
8/19/2026, 3:00:00 PM 100% 1 23ms
8/19/2026, 4:00:00 PM 100% 1 23ms
8/19/2026, 6:00:00 PM 100% 1 20ms
8/19/2026, 7:00:00 PM 100% 1 21ms
8/19/2026, 8:00:00 PM 100% 1 49ms
8/19/2026, 9:00:00 PM 100% 1 22ms
8/19/2026, 10:00:00 PM 100% 1 19ms
8/19/2026, 11:00:00 PM 100% 1 23ms
8/20/2026, 1:00:00 AM 100% 1 21ms
8/20/2026, 2:00:00 AM 100% 1 20ms
8/20/2026, 3:00:00 AM 100% 1 21ms
8/20/2026, 4:00:00 AM 100% 1 22ms
8/20/2026, 5:00:00 AM 100% 1 22ms
8/20/2026, 6:00:00 AM 100% 1 19ms
8/20/2026, 8:00:00 AM 100% 1 19ms
8/20/2026, 9:00:00 AM 100% 1 19ms
8/20/2026, 10:00:00 AM 100% 1 19ms
8/20/2026, 11:00:00 AM 100% 1 21ms
8/20/2026, 12:00:00 PM 100% 1 21ms
8/20/2026, 1:00:00 PM 100% 1 20ms
8/20/2026, 3:00:00 PM 100% 1 21ms
8/20/2026, 4:00:00 PM 100% 1 20ms
8/20/2026, 5:00:00 PM 100% 1 21ms
8/20/2026, 6:00:00 PM 100% 1 28ms
8/20/2026, 7:00:00 PM 100% 1 26ms
8/20/2026, 8:00:00 PM 100% 1 21ms
8/20/2026, 10:00:00 PM 100% 1 25ms
8/20/2026, 11:00:00 PM 100% 1 21ms
8/21/2026, 12:00:00 AM 100% 1 22ms
8/21/2026, 1:00:00 AM 100% 1 18ms
62
Composite reliability — the weighted average of the dimensions below, on a 0–100 scale.
Availability
100

How often it was reachable when we probed it (weight 35%).

Latency
100

How quickly it answers when it is up — fast scores high (weight 20%).

Security
100

Whether it serves over working TLS / https (weight 15%).

Transparency
36

Whether the operator disclosed what it does — description, schema, identity (weight 15%).

Activity
14

Observed on-chain payments to this endpoint's wallet — transactions, volume, and distinct paying wallets over the last month (weight 15%; not yet measured when we have not seen its wallet settle).

Confidence 100% — how much probe evidence backs this score. A thin history is flagged, not hidden.

See the scoring methodology for exactly how each number is computed.

Payment

Currencies
USDC
Networks
base, solana:5eykt4UsFv8P8NJdTREpY1vzqKqZKvdp
Facilitator
unknown
SDK
x402-express

Operator

Company
inferred — unknown
Jurisdiction
—
Registrar
NameCheap, Inc.
Domain registered
2026-02-18
Hosting network
DIGITALOCEAN-45-55-0-0
Hosting country
—

Operator context is derived from public RDAP/TLS records and unverified. Company and country are only available for endpoints that publish them (an OV/EV TLS certificate or a non-redacted domain record); most endpoints are CDN-fronted and disclose neither.

On-chain activity (base)

35
payments (30d)
3.32
USD volume (30d)
7
paying wallets (30d)

Payments per day

last payment 8/18/2026
0 10 20 Jul 25Jul 31Aug 5Aug 18
Data table
Settled payments per day.
Day Payments Volume (USD) Paying wallets
7/25/2026 1 0.01 1
7/26/2026 1 0.01 1
7/27/2026 1 0.01 1
7/28/2026 2 0.02 2
7/31/2026 1 0.01 1
8/1/2026 1 0.01 1
8/3/2026 15 3.12 2
8/4/2026 4 0.04 1
8/5/2026 5 0.05 1
8/7/2026 1 0.01 1
8/12/2026 1 0.01 1
8/14/2026 1 0.01 1
8/18/2026 1 0.01 1

This payout wallet is shared: figures cover all 11 endpoints paid at it, since payments cannot be attributed to one of them. Only payments settled on chains and facilitators we index.

Linked by wallet — likely same operator

On-chain agent identity and the x402 endpoint that shares its settlement wallet.

https://underground.substratesymposium.com/buy/aloe x402 endpoint https://underground.substratesymposium.com/api/data-daily x402 endpoint https://underground.substratesymposium.com/api/bartender-benchmark x402 endpoint http://underground.substratesymposium.com/buy/jade_plant x402 endpoint https://underground.substratesymposium.com/api/merchant-key x402 endpoint