Download December 2025 backup data via x402 micropayment on Base (USDC).
What it does
This endpoint at lowpaymentfee.com provides access to a downloadable backup file for December 2025. It is part of a broader platform that offers a variety of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind the x402 payment protocol on the Base network using USDC.
The specific endpoint `/api/v1/backups/2025-12/download` accepts POST requests and returns a JSON response upon successful payment. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 "exact" scheme to the specified payTo address, with a timeout of 300 seconds. No API keys or rate limits are advertised; access is instant once payment is included in the X-PAYMENT header.
Documentation on the site is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema beyond the x402 outputSchema stub, and no description of what the backup file actually contains. The endpoint is live (returns a proper 402 challenge), but the lack of documentation makes it difficult to know what data is included in the backup or what format the response takes.
Capabilities
Use cases
- —Downloading monthly backup archives for December 2025
- —Programmatic retrieval of backup data without API key management
- —Agent-driven data acquisition using x402 micropayments
Fit
Best for
- —Users who need a specific December 2025 backup file
- —Agents that can settle x402 payments in USDC on Base
- —Scenarios requiring keyless, pay-per-use data downloads
Not for
- —Users who need detailed documentation or schema before purchasing
- —Bulk or streaming data access (single-file download per call)
- —Users without USDC on Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-12/download \
-H "X-PAYMENT: <x402-payment-token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no description of what the backup actually contains. The listing is effectively a stub with only the x402 challenge metadata to work from.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI or request/response schema provided
- —Unknown backup contents — no description of what data the December 2025 backup includes
- —No example responses available to verify output format
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/backups/2025-12/download
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/2025-12/download