x402-gated backup/archive endpoint on Base, paid per-request in USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a backup resource dated 2025-03 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.
The specific endpoint `/api/v1/backups/2025-03` is described only as "Premium API Access" with no further documentation on what the backup data contains or what request/response schemas look like. The x402 challenge is live and returns a maxAmountRequired of 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made via the "exact" scheme to a specified wallet address on Base. The platform advertises no API keys, no rate limits, and instant access — the only requirement is an x402-compatible payment header.
Documentation is extremely sparse: the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema beyond the minimal outputSchema in the x402 challenge, and no description of what the backup data actually contains. Users should treat this as an opaque endpoint until more documentation surfaces.
Capabilities
Use cases
- —Retrieving backup or archive data for the 2025-03 period
- —Programmatic access to stored data via micropayment
- —Agent-driven data retrieval without API key management
Fit
Best for
- —Agents or scripts that need keyless, pay-per-call access to backup data
- —Users who prefer crypto micropayments over subscription billing
- —Automated workflows on Base network that can attach x402 payment headers
Not for
- —Users who need detailed documentation or schema guarantees before integrating
- —High-volume bulk data retrieval where per-request pricing adds up
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-03 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is zero documentation on what this backup endpoint actually returns, no request/response schemas, and all doc pages render only 'Connect wallet'. This is effectively a stub listing.
Warnings
- —No documentation available — all doc/pricing/README pages show only 'Connect wallet'
- —No request or response schema provided; the content of the backup data is unknown
- —The endpoint path suggests time-specific data (2025-03) which may become stale or irrelevant
- —No OpenAPI spec or AI plugin manifest found
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin, 6 decimals) on Base, equaling $0.02 per requesthttps://lowpaymentfee.com/api/v1/backups/2025-03
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —Documentation, pricing, API, and README pages all render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs