x402-gated backup endpoint on Base, pay-per-request with USDC — part of a broader low-fee API platform.
What it does
This endpoint at `/api/v1/backups/35` is one of many x402-protocol endpoints hosted on lowpaymentfee.com, a platform offering pay-per-request APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories. All endpoints are gated via the x402 payment protocol, settling in USDC on the Base network. The platform advertises $0.02 per request with no API keys, no rate limits, and instant access.
The specific `/api/v1/backups/35` endpoint is labeled "Premium API Access" in the x402 challenge. Its exact functionality is not documented on the site's landing page — the crawled pages only list analytics, AI, finance, and utility endpoints, with no mention of a "backups" category. The x402 challenge confirms it is live and accepts POST requests, requiring up to 20,000 base units of USDC (i.e., $0.02) per call, consistent with the platform's uniform pricing. The response MIME type is `application/json`.
Because the crawled documentation pages (docs, pricing, README) all returned only a "Connect wallet" prompt with no substantive content, the actual request/response schema for this endpoint is unknown. There is no OpenAPI spec, no example payloads, and no description of what "backups/35" returns. Treat this as a minimally documented endpoint on an otherwise structured platform.
Capabilities
Use cases
- —Retrieving or triggering a backup resource via a single paid API call
- —Programmatic access to backup data without API key management
- —Agent-driven pay-per-use backup retrieval on Base
Fit
Best for
- —Developers wanting keyless, pay-per-call backup access
- —AI agents that can settle x402 payments in USDC on Base
- —Users who prefer micro-payments over subscription billing
Not for
- —Users needing detailed documentation or guaranteed SLAs before integrating
- —Bulk backup operations where per-request pricing would be costly
- —Anyone unable to pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/35 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what /api/v1/backups/35 actually does — no schema, no examples, no description beyond the generic 'Premium API Access' label. Docs pages returned only wallet-connect prompts.
Warnings
- —The /api/v1/backups/35 endpoint is not listed on the provider's landing page among their advertised APIs — its purpose is unclear.
- —All documentation pages (docs, pricing, README) returned only a 'Connect wallet' prompt with no usable content.
- —No OpenAPI spec, request schema, or response schema is available for this endpoint.
- —The exact nature of 'backups/35' (what data it returns or what action it performs) cannot be determined from available material.
Citations
- —The endpoint returns a 402 challenge requiring USDC payment on Base network with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/backups/35
- —The platform advertises $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913.https://lowpaymentfee.com/api/v1/backups/35
- —Documentation, pricing, and README pages returned only a 'Connect wallet' prompt.https://lowpaymentfee.com/docs