x402basequality 0.35

Download backup data for September 2026 via x402 micropayment on Base network.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/backups/2026-09/download

What it does

This endpoint at lowpaymentfee.com provides a downloadable backup file for the period 2026-09, gated behind an x402 payment challenge. The endpoint accepts POST requests and returns application/json content. Payment is settled in USDC on the Base network at $0.02 per request (20,000 base units of USDC with 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The provider lowpaymentfee.com hosts a broader suite of pay-per-call APIs spanning data analytics, AI/ML inference, finance/crypto data, and infrastructure utilities, all priced at $0.02 per request. This specific endpoint appears to serve archived backup data. However, the exact contents of the backup and the schema of the response body are not documented. The crawled docs, pricing, API, and README pages all returned only a "Connect wallet" prompt with no additional documentation.

Because there is no OpenAPI spec, no response schema, and no documentation beyond the landing page listing, the actual data returned by this endpoint is unclear. Callers should be prepared for an undocumented JSON response and may need to experiment to understand the payload structure.

Capabilities

x402-paymentusdc-basebackup-downloadpay-per-requestno-api-key

Use cases

  • —Downloading archived backup data for September 2026
  • —Programmatic retrieval of periodic data snapshots via micropayment
  • —Agent-driven data acquisition without API key registration

Fit

Best for

  • —Agents needing on-demand backup data without subscription commitments
  • —Developers who prefer pay-per-call over API key management
  • —Workflows requiring Base-network USDC settlement

Not for

  • —Users needing well-documented response schemas before integration
  • —High-volume bulk downloads where per-request pricing adds up
  • —Anyone requiring non-crypto payment methods

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/2026-09/download \
  -H "X-PAYMENT: <x402_payment_proof>" \
  -H "Content-Type: application/json"

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/backups/2026-09/download",
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402_payment_proof>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/2026-09/download
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI spec, no response schema, no documentation beyond a landing page, and the purpose of the 'backup' data is unexplained. Docs pages returned only wallet-connect prompts.

Warnings

  • —No OpenAPI or response schema available — response payload structure is unknown
  • —All documentation pages (docs, api, pricing, README) returned only 'Connect wallet' with no useful content
  • —The nature and contents of the 'backups/2026-09' data are undocumented
  • —Future-dated path segment (2026-09) raises questions about what data is actually served

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 16:03:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/r972XV