x402-gated backup endpoint on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/backups/36`. It is part of a broader platform offering dozens of pay-per-call API endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utility categories — all gated via the x402 payment protocol on the Base network.
The specific `/api/v1/backups/36` endpoint accepts POST requests and returns `application/json` responses. 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 is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a timeout of 300 seconds. No API keys or rate limits are advertised; access is granted purely through the x402 payment header.
Documentation is extremely sparse. The landing page lists many endpoints but provides no request/response schemas, parameter descriptions, or usage examples. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. The exact purpose of the "backups/36" resource is unclear — it could be a data backup retrieval endpoint or a placeholder. Without documentation or example payloads, the actual functionality cannot be confirmed beyond the x402 challenge metadata.
Capabilities
Use cases
- —Retrieving or triggering backup data via a single paid API call
- —Agent-driven workflows that need keyless, pay-as-you-go API access on Base
- —Programmatic access to backup resources without subscription commitments
Fit
Best for
- —Developers wanting zero-signup, pay-per-request API access
- —AI agents that can settle x402 payments in USDC on Base
- —Users who prefer crypto-native micropayments over traditional API key auth
Not for
- —Users needing detailed API documentation or guaranteed SLAs
- —Anyone requiring non-crypto payment methods
- —Production workloads that depend on well-documented request/response contracts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/36 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"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/36' is unexplained. Docs pages are empty beyond a wallet-connect prompt.
Warnings
- —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
- —The purpose and expected input/output of /api/v1/backups/36 is completely undocumented
- —No OpenAPI spec, no request schema, no response schema provided
- —Cannot verify what data or functionality this endpoint actually delivers
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/backups/36
- —Platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/36
- —Docs, API, pricing, and README pages render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs