Download 2023-03 backup data via x402 micropayment on Base for $0.02 per request.
What it does
This endpoint at lowpaymentfee.com provides access to a downloadable backup file (2023-03 period) behind an x402 paywall. The endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a per-request cost of $0.02 (20,000 base units at 6 decimals). No API keys or rate limits are required — callers simply attach a valid X-PAYMENT header to authorize the micropayment.
The broader lowpaymentfee.com platform advertises a suite of x402-gated APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities, all priced uniformly at $0.02 per request. This specific endpoint (/api/v1/backups/2023-03/download) appears to serve archived backup data from March 2023. The x402 challenge was successfully captured with version 1, confirming the endpoint is live. Documentation on the site is extremely thin — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail.
Because there is no OpenAPI schema, no request/response examples, and no documentation beyond the landing page listing, the actual structure of the backup data returned is unknown. Callers should expect a JSON response based on the declared mimeType but should be prepared for the possibility of a binary payload or download link.
Capabilities
Use cases
- —Downloading archived backup data from March 2023 via a single micropayment
- —Programmatic retrieval of historical data snapshots without subscription or API key
- —Agent-driven data acquisition using x402 payment protocol on Base
Fit
Best for
- —Agents needing one-shot access to archived backup data
- —Developers testing x402 payment flows with a low-cost endpoint
- —Users who want keyless, pay-per-use data downloads
Not for
- —Users needing real-time or streaming data access
- —Anyone requiring detailed API documentation or schema guarantees before calling
- —Bulk or high-volume backup retrieval where per-request fees add up
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-03/download \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and confirms pricing and network details, but there is zero documentation, no OpenAPI schema, no request/response examples, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The purpose and schema of the backup data are entirely unknown.
Warnings
- —No OpenAPI or schema documentation available — response structure is unknown
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —The nature and contents of the 'backup' data are unspecified; callers cannot verify what they are paying for
- —No request body schema documented — unclear if POST body parameters are needed
Citations
- —Endpoint returns 402 with x402 version 1 challenge, confirming it is livehttps://lowpaymentfee.com/api/v1/backups/2023-03/download
- —Payment is 20,000 base units of USDC (6 decimals = $0.02) on Base networkhttps://lowpaymentfee.com/api/v1/backups/2023-03/download
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/backups/2023-03/download
- —Docs, API, pricing, and README pages show only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs