x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" for the resource `/api/v1/backups/2025-11`, gated behind the x402 payment protocol. The endpoint is live and returns a standard 402 challenge requesting payment in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. Payment is made via the x402 "exact" scheme to the specified wallet address, with a timeout of 300 seconds.
The broader lowpaymentfee.com platform advertises a wide catalog of x402-gated APIs spanning data & analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all priced at $0.02 per request. The platform emphasizes no API keys, no rate limits, and instant access.
However, the specific endpoint being listed here (`/api/v1/backups/2025-11`) is not described in the site's public catalog. Its purpose — whether it returns backup data, archived datasets, or something else — is unclear from available material. Documentation pages (/docs, /pricing, /README) returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed documentation for this or any other endpoint on the site.
Capabilities
Use cases
- —Retrieving backup or archived data for November 2025 via a single micropayment
- —Agent-driven data access without API keys using x402 payment protocol
- —Programmatic access to premium content gated behind USDC micropayments
Fit
Best for
- —Agents or scripts that need keyless, pay-per-call data access on Base
- —Developers experimenting with x402 payment-gated endpoints
- —Accessing backup/archival data without subscription commitments
Not for
- —Users who need detailed documentation or schema before integrating
- —High-volume use cases where per-request pricing may add up without bulk discounts
- —Anyone needing non-USDC or non-Base-network payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI schema, no request/response examples, and the specific purpose of the /backups/2025-11 resource is unexplained. All doc pages return only 'Connect wallet' with no content.
Warnings
- —The specific endpoint /api/v1/backups/2025-11 is not listed in the site's public API catalog — its purpose is unknown.
- —No documentation, OpenAPI spec, or request/response examples are available for any endpoint on the site.
- —All documentation pages (/docs, /pricing, /README, /api) returned only a 'Connect wallet' prompt with no substantive content.
- —The nature of the data returned (backups, archives, etc.) is entirely unclear.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, requesting 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/backups/2025-11
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/backups/2025-11
- —The site advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The site lists API categories including Data & Analytics, AI & ML, Finance & Web3, and Infrastructurehttps://lowpaymentfee.com