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/4

What it does

This endpoint at `/api/v1/backups/4` is part of the lowpaymentfee.com platform, which offers a collection of x402-protocol pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. The specific `/backups/4` resource is listed under "Premium API Access" but its exact functionality is not documented beyond that label — it likely returns some form of backup data or stored resource identified by ID 4.

The endpoint is live and returns a standard x402 payment challenge. It accepts POST requests and settles payments in USDC on the Base network. The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request — consistent with the platform's uniform $0.02/request pricing across all endpoints. Payment is made via the x402 exact scheme to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, with a 300-second timeout window.

The platform advertises no API keys, no rate limits, and instant access. Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no detailed description of what the `/api/v1/backups/4` endpoint actually returns. The lack of documentation makes it difficult to assess the actual utility of this specific endpoint.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestpost-methodbackup-retrieval

Use cases

  • —Retrieving stored backup data via a single pay-per-request call
  • —Agent-driven data retrieval without API key management
  • —Programmatic access to backup resources settled in USDC on Base

Fit

Best for

  • —Agents or scripts that need keyless, pay-per-call API access
  • —Users who prefer crypto micro-payments over subscription billing
  • —Developers experimenting with x402 protocol integrations

Not for

  • —Users who need detailed API documentation before integrating
  • —High-volume use cases where $0.02/request adds up significantly
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/4 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/4
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is virtually no documentation — no OpenAPI spec, no request/response examples, and no explanation of what '/api/v1/backups/4' actually returns. The docs pages are empty beyond a wallet connect prompt. Pricing is clear ($0.02/request in USDC on Base) but the endpoint's purpose remains opaque.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
  • —The exact purpose and response format of /api/v1/backups/4 is unknown; 'Premium API Access' is the only description
  • —No OpenAPI schema or request/response examples provided
  • —No information on what input the POST body should contain

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 16:09:33Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4JFw9s
x402-gated backup endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart