x402basequality 0.30

x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/backups/5

What it does

This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path `/api/v1/backups/5`. It is part of a broader platform offering dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated via the x402 payment protocol on the Base network.

The specific `/api/v1/backups/5` endpoint accepts POST requests and returns `application/json`. Payment is settled in USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base) using the x402 "exact" scheme. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. The platform advertises uniform $0.02 pricing across all its endpoints, no API keys, no rate limits, and instant access.

The endpoint's specific functionality is unclear — the name "backups/5" and the generic description "Premium API Access" do not reveal what data or service is returned. The crawled documentation pages (`/docs`, `/api`, `/pricing`, `/README`) all rendered only a "Connect wallet" prompt with no further content, so no detailed API documentation, request/response schemas, or usage examples are available. The endpoint is confirmed live (returns a valid x402 402 challenge), but the lack of documentation about what this particular endpoint actually does is a significant gap.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestjson-responsepost-method

Use cases

  • —Accessing backup data via a single paid API call
  • —Agent-driven retrieval of backup resources without API key management
  • —Programmatic pay-per-use access to premium data endpoints

Fit

Best for

  • —Agents or services that need keyless, pay-per-call API access
  • —Users who prefer crypto micropayments over subscription billing
  • —Workflows on Base network that already hold USDC

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume use cases where per-request pricing may add up
  • —Anyone needing non-USDC or non-Base payment options

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/5 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/5
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation about what the /api/v1/backups/5 endpoint actually returns, no request/response schema, and all doc pages render only a wallet-connect prompt. The purpose of this specific endpoint is essentially unknown.

Warnings

  • —The specific functionality of /api/v1/backups/5 is undocumented — 'Premium API Access' is a generic label applied across the platform.
  • —All documentation pages (/docs, /api, /pricing, /README) returned only a 'Connect wallet' prompt with no usable content.
  • —No request body schema or response schema is available; integration requires trial-and-error or out-of-band information.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 16:03:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/XLnqNu
x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart