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 "Premium API Access" resource at the path `/api/v1/backups/3`. It is part of a broader platform offering dozens of pay-per-request 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/3` 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/request pricing model across all endpoints. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) returned only a "Connect wallet" prompt with no further technical detail, so the actual behavior and response schema of the `/api/v1/backups/3` endpoint remain unclear. The endpoint name suggests it retrieves or creates a backup resource, but no schema or example responses are available to confirm this.
Capabilities
Use cases
- —Retrieving or creating data backups via a single paid API call
- —Agent-driven backup workflows that settle payment in USDC on Base
- —Programmatic access to backup resources without API key management
Fit
Best for
- —Developers wanting key-less, pay-per-use backup access
- —AI agents with x402-compatible wallets on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users needing detailed API documentation or response schemas before integrating
- —High-volume backup operations where per-request pricing may add up
- —Users without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/3 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint exists and its pricing. However, there is no documentation, no OpenAPI schema, no example request/response, and the purpose of '/api/v1/backups/3' is ambiguous. All doc pages returned only 'Connect wallet' with no content.
Warnings
- —No documentation available — all doc pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt
- —The purpose and response schema of /api/v1/backups/3 are unknown; 'Premium API Access' is a generic label used across the platform
- —No OpenAPI spec or output schema beyond basic HTTP method info
- —Cannot verify what data the endpoint actually returns
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/backups/3
- —Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/3
- —Documentation pages return only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs