x402-gated backup endpoint on Base, pay-per-request with USDC at $0.02/call.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/backups/22`. It is part of a broader platform offering dozens of pay-per-call API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated via the x402 payment protocol on the Base network.
The specific `/api/v1/backups/22` endpoint accepts POST requests and returns `application/json`. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) with a maximum amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment timeout is 300 seconds. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.
The platform's landing page lists a uniform $0.02 per request pricing across all endpoints. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a "Connect wallet" prompt with no further content, so the actual behavior and response schema of this particular backup endpoint remain unclear. The endpoint name "backups/22" and description "Premium API Access" are generic and do not reveal what data or functionality is returned.
Capabilities
Use cases
- —Retrieving backup data or resources behind a micropayment wall
- —Agent-driven programmatic access to paid API endpoints without API keys
- —Demonstrating x402 payment protocol integration on Base
Fit
Best for
- —Developers experimenting with x402 payment-gated APIs
- —Agents that can settle USDC payments on Base L2
- —Use cases requiring keyless, pay-per-call API access
Not for
- —Users who need detailed documentation or response schema before integrating
- —High-volume batch operations where per-request fees add up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/22 \
-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). However, there is no documentation, no OpenAPI schema, no example requests or responses, and the purpose of the '/api/v1/backups/22' resource is entirely opaque. All doc pages returned only 'Connect wallet' with no content.
Warnings
- —The purpose and response format of /api/v1/backups/22 are unknown — 'Premium API Access' is a generic label with no further explanation.
- —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no usable content.
- —No OpenAPI spec, no output schema beyond mimeType application/json, and no example responses are available.
- —The endpoint path 'backups/22' suggests a specific resource ID; it is unclear what backup data this refers to or whether it is a demo/test resource.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/backups/22
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/22
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Documentation pages returned only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs