x402-gated backup data endpoint on Base, paying $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a backup resource dated 2023-03 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of API categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request settled in USDC on the Base network.
The specific resource `/api/v1/backups/2023-03` is described only as "Premium API Access" with no further documentation on what the backup data contains or its schema. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 "exact" scheme to the specified payTo address, with a 300-second timeout.
The broader platform advertises no API keys, no rate limits, and instant access. However, documentation pages (/docs, /pricing, /README) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior, request format, and response schema of this particular endpoint remain undocumented. Prospective callers should be aware that the nature of the "backup" data is entirely unclear from available materials.
Capabilities
Use cases
- —Retrieving archived backup data from March 2023 via micropayment
- —Programmatic access to backup resources without API key management
- —Agent-driven data retrieval with per-call USDC settlement on Base
Fit
Best for
- —Users who need on-demand access to specific backup data without subscriptions
- —AI agents that can settle x402 payments in USDC on Base
- —Developers exploring x402 pay-per-call API patterns
Not for
- —Users who need documented response schemas before integrating
- —Anyone requiring non-crypto payment methods
- —Bulk data retrieval where per-request fees would accumulate significantly
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-03 \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is zero documentation on what this backup endpoint actually returns, no request/response schema, and all doc pages are empty. The endpoint's purpose ('backups/2023-03') is opaque.
Warnings
- —No documentation available — /docs, /pricing, and /README pages all return only a 'Connect wallet' prompt with no content.
- —The nature of the 'backup' data at /api/v1/backups/2023-03 is completely undocumented; it is unclear what this endpoint returns.
- —No request body schema or response schema is provided anywhere.
- —This endpoint does not appear in the site's own listed API catalog, raising questions about its intended audience.
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, equaling $0.02.https://lowpaymentfee.com/api/v1/backups/2023-03
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no substantive content.https://lowpaymentfee.com/docs