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 a "Premium API Access" resource at the path `/api/v1/backups/11`. 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 endpoint `/api/v1/backups/11` accepts POST requests and returns `application/json`. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) using the x402 "exact" scheme. The maximum amount required is 20,000 base units of USDC, which equals $0.02 (USDC uses 6 decimals). The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the payment timeout is 300 seconds.
The platform advertises a uniform $0.02 per request pricing model across all its endpoints, with no API keys, no rate limits, and no minimum commitments. However, documentation beyond the landing page is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. The exact functionality of the `/api/v1/backups/11` endpoint is unclear; the name suggests it may return or create a backup resource, but no schema, example payloads, or detailed documentation are available to confirm this.
Capabilities
Use cases
- —Retrieving or creating data backups via a pay-per-request model
- —Integrating x402 payment-gated API calls into agent workflows
- —Accessing premium data resources without API key management
Fit
Best for
- —Developers experimenting with x402 payment protocol on Base
- —Agents needing keyless, pay-per-call API access
- —Low-volume or sporadic backup data retrieval
Not for
- —High-volume backup operations where $0.02/request adds up quickly
- —Users who need detailed API documentation or guaranteed SLAs
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no documentation, no request/response schema, and no explanation of what '/api/v1/backups/11' actually does. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content.
- —The exact purpose and behavior of /api/v1/backups/11 is unknown; 'Premium API Access' is a generic label used across the platform.
- —No OpenAPI spec, no request/response examples, and no output schema beyond basic HTTP metadata.
- —No robots.txt or agents.txt found on the origin.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/backups/11
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/11
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Platform offers endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com