Download 2025-07 backup data via x402 micropayment on Base (USDC, $0.02/request).
What it does
This endpoint at lowpaymentfee.com provides downloadable backup data for the 2025-07 period, gated behind an x402 micropayment. The endpoint accepts POST requests and returns application/json content. Payment is settled on the Base network using USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The provider, lowpaymentfee.com, hosts a broader 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/2025-07/download) appears to serve a backup archive for July 2025. However, the crawled documentation pages (docs, pricing, README) returned only a "Connect wallet" prompt with no further detail, so the exact schema of the backup payload, its contents, and any input parameters remain undocumented.
The endpoint is confirmed live: the probe received a proper HTTP 402 challenge with x402 version 1, scheme "exact", and a 300-second payment timeout. The landing page at the origin root returned HTTP 200 with a full listing of available APIs. Because documentation is essentially absent beyond the landing page summary, users should expect to experiment with the endpoint to understand the response format.
Capabilities
Use cases
- —Downloading July 2025 backup archives via a single micropayment
- —Programmatic retrieval of backup data without API key registration
- —Agent-driven data acquisition using x402 payment protocol on Base
Fit
Best for
- —Agents or scripts that need on-demand backup data without account setup
- —Developers experimenting with x402 micropayment-gated endpoints
- —Automated workflows requiring pay-per-use data downloads on Base
Not for
- —Users needing detailed API documentation or guaranteed response schemas
- —Bulk backup retrieval where per-request fees would accumulate significantly
- —Anyone without a Base-network USDC wallet or x402-compatible client
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-07/download \
-H "X-PAYMENT: <x402-payment-proof>" \
-H "Content-Type: application/json"Example
Request
{
"url": "https://lowpaymentfee.com/api/v1/backups/2025-07/download",
"method": "POST",
"headers": {
"X-PAYMENT": "<x402-payment-proof>",
"Content-Type": "application/json"
}
}Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, but documentation is essentially nonexistent — all doc/pricing/README pages returned only 'Connect wallet'. The backup endpoint's response schema, input parameters, and actual data contents are completely unknown. Pricing is clear ($0.02 USDC on Base) but everything else must be inferred.
Warnings
- —Documentation pages (/docs, /pricing, /README, /api) all returned only 'Connect wallet' with no usable content.
- —No OpenAPI schema, no response examples, and no description of what the backup data actually contains.
- —The endpoint path references '2025-07' — it may be time-scoped and could become stale or return empty data outside that period.
- —The exact request body schema (if any) is undocumented; callers will need to experiment.
Citations
- —Endpoint returns HTTP 402 with x402 version 1 challenge, scheme 'exact', on Base network using USDChttps://lowpaymentfee.com/api/v1/backups/2025-07/download
- —maxAmountRequired is 20000 base units of USDC (6 decimals) = $0.02 per requesthttps://lowpaymentfee.com/api/v1/backups/2025-07/download
- —Provider advertises $0.02/request pricing with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/2025-07/download