x402-gated backup data endpoint on Base, payable in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides access to a backup resource dated 2023-11 via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 challenges on the Base network using USDC.
The specific endpoint `/api/v1/backups/2023-11` returns JSON and costs $0.02 per request (20,000 base units of USDC with 6 decimals). Payment is made via the x402 "exact" scheme to a designated wallet on Base. No API keys, rate limits, or subscriptions are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof. The endpoint accepts POST requests and has a maximum payment timeout of 300 seconds.
The platform's landing page lists the endpoint under "Premium API Access" but provides no further documentation about what the backup data contains or what request/response schemas look like. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. Because of this, the actual data returned by this endpoint is unknown — it could be a database backup, archived dataset, or something else entirely. Prospective callers should be aware that there is essentially no documentation beyond the x402 challenge metadata.
Capabilities
Use cases
- —Retrieving archived or backup data from November 2023
- —Programmatic access to stored datasets behind a micropayment wall
- —Agent-driven data retrieval with automatic x402 payment
Fit
Best for
- —Agents or scripts that need on-demand access to archived data with no signup
- —Users comfortable with x402 crypto-payment flows on Base
- —Low-cost per-request data access without API key management
Not for
- —Users who need detailed documentation or schema guarantees before calling
- —Anyone without a Base-compatible USDC wallet
- —High-volume bulk data retrieval where per-request fees add up
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is zero documentation about what the backup data contains, no request/response schema, and no examples. The docs/pricing/README pages are all empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation exists for this specific endpoint — the backup data contents are completely unknown.
- —All secondary pages (docs, API, pricing, README) render only 'Connect wallet' with no useful content.
- —No request body schema or response schema is documented anywhere.
- —The endpoint path suggests a time-specific resource (2023-11) which may be stale or static archival data.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC), maxAmountRequired 20000https://lowpaymentfee.com/api/v1/backups/2023-11
- —Platform pricing is $0.02 per request with no API keys, no rate limits, instant access, on Base networkhttps://lowpaymentfee.com
- —The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com