x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides a pay-per-request "Premium API Access" resource at the path /api/v1/backups/45. It is part of a broader platform offering dozens of x402-gated API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.
The specific endpoint /api/v1/backups/45 accepts POST requests and returns application/json. Payment is handled via the x402 protocol: callers must include an X-PAYMENT header with a valid payment proof. The maximum amount required is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.
The platform advertises no API keys, no rate limits, and instant access. However, documentation beyond the landing page is essentially empty (all doc/pricing/README pages only show a "Connect wallet" prompt), so the exact request body schema and response format for this backup endpoint are unknown. The endpoint name suggests it may retrieve or create a backup resource, but this is speculative given the lack of documentation.
Capabilities
Use cases
- —Retrieving or creating backup data via a pay-per-call model without API key management
- —Integrating automated agents that pay per request using USDC on Base
- —Accessing premium backup resources with no subscription or rate limits
Fit
Best for
- —Agents or services that need on-demand backup access with crypto micropayments
- —Developers wanting keyless, pay-as-you-go API access on Base
- —Workflows requiring low-friction, per-call payment without subscriptions
Not for
- —Users who need detailed API documentation or schema validation before integration
- —High-volume batch operations where $0.02/request adds up significantly
- —Users without access to USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/45 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the purpose of /api/v1/backups/45 is unclear. All doc pages return only 'Connect wallet' with no useful content.
Warnings
- —No documentation available — all doc/pricing/README pages show only 'Connect wallet'
- —Request body schema and response format for /api/v1/backups/45 are completely unknown
- —The purpose of the 'backups/45' resource is unclear; the name is not self-explanatory
- —No OpenAPI spec or AI plugin manifest found
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/backups/45
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/45
- —Documentation, pricing, and README pages all render only a 'Connect wallet' prompt with no further contenthttps://lowpaymentfee.com/docs