x402-gated backup/data endpoint on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/backups/2026-11`. It is part of a broader platform offering dozens of x402-payable API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request, settled in USDC on the Base network.
The specific `/api/v1/backups/2026-11` path suggests a dated backup or snapshot resource (November 2026). However, no documentation beyond the landing page was retrievable — the docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what the backup resource actually contains or what POST body it expects.
Payment is handled via the x402 protocol: callers receive a 402 challenge specifying USDC on Base (contract `0x8335…2913`) with a `maxAmountRequired` of 20000 base units, which equals $0.02 (USDC uses 6 decimals). The scheme is "exact" with a 300-second timeout. No API key or account registration is needed — payment is the only authentication. The endpoint is live and responding to the x402 challenge correctly.
Capabilities
Use cases
- —Retrieving a dated backup or data snapshot for November 2026
- —Programmatic access to archived data via micropayment
- —Agent-driven data retrieval without API key provisioning
Fit
Best for
- —Agents needing keyless, pay-per-request data access
- —Developers experimenting with x402 payment flows on Base
- —Automated workflows that need on-demand backup retrieval
Not for
- —Users who need detailed documentation or schema before integrating
- —High-volume bulk data retrieval where per-request pricing adds up
- —Anyone needing non-USDC or non-Base payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-11 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what the backup resource contains, what request body is expected, or what the response looks like. All doc/pricing/API pages returned only 'Connect wallet' with no content. No OpenAPI schema or examples are available. The listing is effectively a stub.
Warnings
- —No documentation available — all doc pages return only a 'Connect wallet' prompt with no content
- —No OpenAPI or request/response schema provided for this endpoint
- —The path '/api/v1/backups/2026-11' implies a future-dated resource (November 2026) which is unusual and may be a placeholder
- —Purpose and contents of the 'backup' resource are entirely unknown
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 base units in USDC on Basehttps://lowpaymentfee.com/api/v1/backups/2026-11
- —The platform advertises $0.02 per request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/backups/2026-11