LitWit — The Literary Witness (MPP)
Pay-per-call endpoint from Penny Press. Price per call: $0.050 (USDC, x402).
Proof
endpoint (shown as text, not a link, to avoid accidental calls):
https://www.pennypress.org/witness/attest“HTTP 402 + x402 v2 challenge: amount 50000 atomic units of USD Coin (= $0.05)”
Details
- Price per call
- $0.050 (USDC, x402)
- Provider
- Penny Press
- Protocol
- x402 · USDC (Base)
- Method
- POST
- Price basis
- USDC amount in the unpaid HTTP 402 payment challenge (first accepted option)
- Last probed
- 2026-10-17