x402-gated backup endpoint on Base, paying $0.02 in USDC per request.
What it does
This endpoint at lowpaymentfee.com provides access to a resource described as "Premium API Access" at the path `/api/v1/backups/2026-04`. It is part of a broader platform offering dozens of x402-payable 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 `/api/v1/backups/2026-04` endpoint 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 for 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base. No API keys or rate limits are advertised; access is purely pay-per-call.
Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the "backups/2026-04" resource actually contains or what POST body it expects. The endpoint is confirmed live (returns a valid 402 challenge), but the actual functionality behind the paywall is unknown from available materials.
Capabilities
Use cases
- —Retrieving backup data for the 2026-04 period via a single paid API call
- —Programmatic access to premium resources without API key registration
- —Agent-driven data retrieval with automatic micropayment settlement on Base
Fit
Best for
- —Agents or scripts that need keyless, pay-per-call access to backup data
- —Users comfortable with x402 payment flows on Base L2
- —Scenarios requiring no signup or rate-limit-free access
Not for
- —Users who need detailed documentation or schema before purchasing
- —Bulk data retrieval where per-request costs would accumulate significantly
- —Anyone unable to settle USDC payments on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-04 \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but there is zero documentation on what the endpoint actually does, what request body it expects, or what it returns. No OpenAPI spec, no examples, and all doc pages are empty wallet-connect stubs. The listing is essentially a stub.
Warnings
- —No documentation available — all doc/pricing/README pages return only a wallet-connect prompt with no content.
- —No OpenAPI or request/response schema provided; the actual functionality behind the paywall is unknown.
- —The endpoint path '/api/v1/backups/2026-04' suggests a dated backup resource, but its contents are unverified.
- —Cannot confirm what data is returned after payment without actually paying.
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/backups/2026-04
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/2026-04
- —Docs, API, pricing, and README pages all returned only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs