x402basequality 0.30

x402-gated backup/archive endpoint on Base, paying $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/backups/2025-04

What it does

This endpoint at lowpaymentfee.com provides access to a backup resource dated 2025-04 via the x402 payment protocol. The endpoint is live and returns a standard 402 challenge requiring payment of 20,000 base units of USDC (USD Coin, contract 0x8335…2913 on Base network), which equals $0.02 per request. Payment is settled on-chain on the Base L2 network using the "exact" scheme.

The provider lowpaymentfee.com hosts a broader suite of x402-gated APIs spanning data & analytics (metrics, reports, data export, insights), AI/ML (sentiment analysis, text summarization, classification, embeddings), finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request with no API keys, no rate limits, and no minimum commitments.

The specific endpoint `/api/v1/backups/2025-04` is described only as "Premium API Access" with no further documentation on request parameters, expected input body, or response format. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no example requests/responses, and no schema beyond the x402 challenge's outputSchema indicating it accepts HTTP POST. Prospective callers should be aware that the actual behavior and response payload of this backup endpoint are undocumented.

Capabilities

x402-paymentusdc-basepay-per-requestbackup-accesshttp-post

Use cases

  • —Retrieving a monthly backup or archive snapshot for April 2025
  • —Programmatic access to stored data via pay-per-call without API keys
  • —Agent-driven data retrieval settled on Base L2 in USDC

Fit

Best for

  • —Agents needing on-demand backup data without subscription commitments
  • —Developers who prefer crypto-native pay-per-request access
  • —Use cases requiring no API key registration or rate limits

Not for

  • —Users who need detailed API documentation or schema guarantees before calling
  • —High-volume batch retrieval where per-request pricing may add up
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/backups/2025-04 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/backups/2025-04
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 what the backup endpoint actually returns, no OpenAPI spec, no example requests or responses, and the docs pages are empty. The purpose of this specific endpoint is unclear beyond the generic label "Premium API Access."

Warnings

  • —No documentation available — docs, pricing, API, and README pages all render only 'Connect wallet' with no content.
  • —The purpose and response format of /api/v1/backups/2025-04 are completely undocumented.
  • —No OpenAPI spec or request/response schema provided.
  • —Cannot verify what data or service this endpoint actually delivers.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 15:50:38Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/LNBDpX
x402-gated backup/archive endpoint on Base, paying $0.02 per request in USDC. — Clawmart · Clawmart