x402-gated backup data endpoint on Base, pay-per-request with USDC.
What it does
This endpoint at lowpaymentfee.com provides access to a backup dataset dated 2023-06 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments settled in USDC on the Base network.
The specific resource `/api/v1/backups/2023-06` is described simply as "Premium API Access" and returns `application/json`. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913, which uses 6 decimals), equating to $0.02 per request. The endpoint accepts POST requests and requires no API keys or authentication beyond the x402 payment header. The platform advertises no rate limits and instant access.
Documentation on the site is extremely sparse — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the backup data actually contains. The endpoint is confirmed live (402 challenge captured), but the lack of documentation makes it difficult to know what payload to send or what response to expect.
Capabilities
Use cases
- —Retrieving archived backup data from June 2023 via a single paid API call
- —Programmatic access to backup datasets without API key registration
- —Agent-driven data retrieval with automatic USDC micropayment on Base
Fit
Best for
- —Agents or applications that need to fetch specific backup data and can pay per-request via x402
- —Users who prefer keyless, wallet-based API access on Base
- —Scenarios requiring one-off data retrieval without subscription commitments
Not for
- —Users who need detailed documentation or schema validation before calling an endpoint
- —High-volume batch retrieval where per-request pricing may add up
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-06 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of the 'backups/2023-06' resource is entirely unexplained. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, API, and README pages all show only 'Connect wallet' with no content.
- —No OpenAPI or schema describing request parameters or response format.
- —The purpose and contents of the 'backups/2023-06' resource are unknown — 'Premium API Access' is a generic label used across the platform.
- —This endpoint does not appear in the site's listed API catalog, raising questions about whether it is a production resource or a test/demo endpoint.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, advertising USDC on Base network with maxAmountRequired of 20000 base units ($0.02).https://lowpaymentfee.com/api/v1/backups/2023-06
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base uses 6 decimals.https://lowpaymentfee.com