x402-gated backup/data endpoint on Base, pay-per-call with USDC at $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific resource `/api/v1/backups/17` is one of many endpoints offered by the provider, which hosts a broad catalog spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.
The x402 challenge confirms the endpoint is live and accepts POST requests. The maximum amount required per call is 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made via the `exact` scheme to the specified payTo address, with a 300-second timeout window. No API keys or rate limits are advertised; access is granted purely through per-request payment.
The specific functionality behind `/api/v1/backups/17` is not documented beyond the label "Premium API Access." The provider's landing page lists many other endpoints (metrics, reports, sentiment analysis, summarization, classification, embeddings, price feeds, exchange rates, geocoding, etc.) all at the same $0.02 price point, but no detailed documentation, request/response schemas, or usage examples are available for any of them. The docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content.
Capabilities
Use cases
- —Retrieving backup data via a single paid POST request
- —Agent-driven data access without API key management
- —Micropayment-gated resource retrieval on Base L2
Fit
Best for
- —Agents needing keyless, pay-per-call data access
- —Developers experimenting with x402 payment flows
- —Accessing low-cost gated endpoints without subscriptions
Not for
- —Users who need detailed API documentation or schemas before integrating
- —High-volume batch operations where per-request fees add up
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/17 \
-H "X-PAYMENT: <x402-payment-header>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no request/response schema, no examples, and the purpose of '/api/v1/backups/17' is entirely opaque beyond the generic label 'Premium API Access.' The docs/pricing/API pages are empty stubs.
Warnings
- —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no content.
- —The specific functionality of /api/v1/backups/17 is undocumented; 'Premium API Access' is the only description.
- —No request or response schema is provided; callers cannot know what to send or what to expect back.
- —The provider lists many diverse endpoints (AI, finance, geocoding, backups) all at the same price with no detail — unclear if these are functional or placeholder.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/backups/17
- —USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/backups/17
- —Provider advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Docs, pricing, and API pages render only a 'Connect wallet' prompt with no further contenthttps://lowpaymentfee.com/docs