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/2023-04

What it does

This endpoint at lowpaymentfee.com provides access to a backup resource dated 2023-04 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 endpoint `/api/v1/backups/2023-04` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform emphasizes simplicity: no API keys, no rate limits, no commitments — just attach an X-PAYMENT header with a valid x402 payment proof.

Documentation is extremely sparse. The docs, pricing, API, 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 description of what the backup data actually contains. The endpoint is live (returns a proper 402 challenge), but without further documentation it is unclear what payload to send or what data is returned.

Capabilities

x402-paymentusdc-basepay-per-requestbackup-datajson-responsepost-method

Use cases

  • —Retrieving archived backup data from April 2023 via micropayment
  • —Programmatic access to backup snapshots without API key management
  • —Agent-driven data retrieval with on-chain USDC payment on Base

Fit

Best for

  • —Developers wanting keyless, pay-per-request access to backup data
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Anyone needing detailed documentation or request/response schemas before integrating
  • —Users without a Base-compatible USDC wallet
  • —High-volume bulk data retrieval where per-request pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/2023-04 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/2023-04
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, but documentation is effectively nonexistent — every docs/pricing/README page shows only 'Connect wallet'. There is no OpenAPI schema, no request/response examples, and no description of what the backup data contains. The listing is a stub with only the challenge metadata to work from.

Warnings

  • —No documentation available — all doc pages render only 'Connect wallet'
  • —No OpenAPI or request/response schema provided
  • —Purpose and contents of the 'backups/2023-04' resource are completely undocumented
  • —The broader platform lists many endpoints but none have documented schemas

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:30:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/NwLfU9
x402-gated backup data endpoint on Base, payable in USDC per request. — Clawmart · Clawmart