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underground.substratesymposium.com buy catalog
https://underground.substratesymposium.com/buy/catalog
answers 402
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.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $0.01
- Network
- base
- Pay to
- 0xA3bAbB36564b0383a82c617050306EE30fd18E08
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 79 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-15T14:26:13.711Z (1d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Funderground.substratesymposium.com%2Fbuy%2Fcatalog"