Download 2023-11 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 for November 2023 via the x402 payment protocol. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a variety of data, AI, finance, and utility APIs — all gated behind x402 micropayments settled in USDC on the Base network.
The specific endpoint `/api/v1/backups/2023-11/download` accepts POST requests and returns a JSON response containing the backup data. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 USD (USDC uses 6 decimals). Payment is made per-request with no API keys, no rate limits, and no subscriptions required — just an x402-compatible payment header.
The broader lowpaymentfee.com platform lists endpoints across categories including analytics/metrics, AI inference (sentiment analysis, summarization, classification, embeddings), finance (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All are priced at $0.02 per request. Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available.
Capabilities
Use cases
- —Downloading archived backup data for November 2023
- —Programmatic retrieval of historical data snapshots
- —Agent-driven data acquisition with per-call crypto payment
Fit
Best for
- —Agents or scripts that need one-off backup data retrieval without subscription overhead
- —Developers experimenting with x402 micropayment-gated APIs
- —Automated workflows requiring pay-per-use data downloads on Base
Not for
- —Users needing detailed API documentation or request/response schemas before integrating
- —High-volume bulk data 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/2023-11/download \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose of the backup file is entirely opaque — we don't know what data it contains or what the response format looks like.
Warnings
- —No OpenAPI or schema documentation available — request and response formats are unknown.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content.
- —The nature and contents of the 'backup' data are completely undocumented.
- —This endpoint appears to serve a static/archival resource (2023-11 backup); its ongoing utility is unclear.
Citations
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/backups/2023-11/download
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/2023-11/download
- —All endpoints on the platform are priced at $0.02 per request with no API keys, no rate limitshttps://lowpaymentfee.com
- —Documentation pages render only a 'Connect wallet' prompt with no further contenthttps://lowpaymentfee.com/docs