x402basequality 0.30

x402-gated backup data endpoint on Base, payable in USDC per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/backups/2023-12

What it does

This endpoint at lowpaymentfee.com provides access to a backup dataset dated 2023-12 via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-request API endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all gated behind x402 micropayments on the Base network using USDC.

The specific resource `/api/v1/backups/2023-12` is described simply as "Premium API Access" and returns `application/json`. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 "exact" scheme with a 300-second timeout. No API keys or rate limits are advertised; access is granted purely through on-chain payment.

Documentation on the site is extremely thin — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema, and no explanation of what the backup data actually contains. The endpoint is confirmed live (returns HTTP 402 with a valid x402 challenge), but the lack of documentation makes it difficult to know what payload to send or what response to expect.

Capabilities

x402-paymentusdc-basepay-per-requestbackup-datajson-responseno-api-key

Use cases

  • —Retrieving archived backup data from December 2023
  • —Programmatic access to historical data snapshots via micropayment
  • —Agent-driven data retrieval without API key management

Fit

Best for

  • —Agents or scripts that need on-demand access to archived data without signup
  • —Users comfortable with x402 USDC payments on Base
  • —Scenarios requiring keyless, pay-per-call data access

Not for

  • —Users who need detailed documentation or schema guarantees before calling
  • —Bulk data retrieval where per-request fees would accumulate significantly
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-12 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/2023-12
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is zero documentation on request format, response schema, or what the backup data actually contains. No OpenAPI spec, no examples, and all doc pages render only 'Connect wallet'. This is effectively a stub listing.

Warnings

  • —No documentation available — all doc/pricing/API pages show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided
  • —The nature of the 'backup' data (2023-12) is completely undocumented
  • —Cannot verify what data is actually returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:21:16Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/QmLHcC
x402-gated backup data endpoint on Base, payable in USDC per request. — Clawmart · Clawmart