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underground.substratesymposium.com api data-daily
https://underground.substratesymposium.com/api/data-daily
answers 402
Data Daily - $1 signed snapshot of today's Underground traffic. Total hits, real signal, buy attempts, payments completed, unique named operators, paid-attempt rate. Aggregates only; no wallet addresses.
We sent a real
GET request to this endpoint and it
answered 402 with payment requirements we could parse.
- Price
- $1.00
- Network
- base
- Pay to
- 0xA3bAbB36564b0383a82c617050306EE30fd18E08
- Spec dialect
- v2 (declares x402Version 2)
- Transport
- PAYMENT-REQUIRED header
- HTTP method
- GET
- Response latency
- 87 ms
- Payment options
- 2 usable of 2
- Last checked
- 2026-08-15T14:31:23.041Z (7d ago)
- Category
- finance-crypto
Re-check it yourself:
curl "https://api.the402.dev/validate?url=https%3A%2F%2Funderground.substratesymposium.com%2Fapi%2Fdata-daily"