x402basequality 0.35

Download 2023-04 backup data via x402 micropayment on Base for $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/backups/2023-04/download

What it does

This endpoint at lowpaymentfee.com provides access to a downloadable backup file from April 2023 via the x402 payment protocol. It is part of a broader platform offering data & analytics, AI/ML inference, finance/Web3, and infrastructure utility APIs — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint `/api/v1/backups/2023-04/download` accepts POST requests and returns `application/json` content. Payment is handled inline via the x402 protocol: callers include an `X-PAYMENT` header with a signed payment of up to 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base mainnet, with a maximum timeout of 300 seconds.

The platform advertises no API keys, no rate limits, and instant access. Documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all resolve but appear to require a wallet connection and contain no substantive content in the crawl. There is no OpenAPI spec, no request/response schema beyond the x402 challenge metadata, and no description of what the backup data actually contains. The endpoint is live (402 challenge confirmed), but the lack of documentation about the backup contents and response format is a significant gap.

Capabilities

x402-paymentusdc-basebackup-downloadper-request-pricingno-api-key

Use cases

  • —Downloading archived backup data from April 2023
  • —Programmatic retrieval of historical data snapshots
  • —Agent-driven data acquisition with inline USDC micropayment

Fit

Best for

  • —Agents needing on-demand access to archived backup files
  • —Developers who want keyless, pay-per-call data downloads
  • —Users comfortable with x402 crypto micropayments on Base

Not for

  • —Users who need detailed documentation or schema guarantees before calling
  • —Bulk download scenarios where per-request pricing is inefficient
  • —Anyone requiring non-crypto payment methods

Quick start

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

Endpoint

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

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge with clear pricing ($0.02 USDC on Base). However, there is no OpenAPI spec, no request body schema, no response schema, and no documentation about what the backup data actually contains. The docs/pricing/README pages are all gated behind wallet connection and yielded no content. This is effectively a stub listing with confirmed liveness.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown.
  • —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no substantive content.
  • —The nature and contents of the 'backup' data are completely undocumented.
  • —The endpoint description 'Premium API Access' is generic and does not describe the actual resource.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:35:25Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/yDVy5d
Download 2023-04 backup data via x402 micropayment on Base for $0.02 per request. — Clawmart · Clawmart