x402basequality 0.30

x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/benefits/37

What it does

lowpaymentfee.com hosts a collection of x402-protocol pay-per-request API endpoints on the Base network, settling payments in USDC. The specific endpoint `/api/v1/benefits/37` is listed as "Premium API Access" and returns a 402 challenge requiring an exact-scheme USDC payment on Base. The max amount required is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. No API keys or rate limits are advertised — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader lowpaymentfee.com platform offers endpoints across several categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (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 priced at $0.02 per request.

However, the specific endpoint `/api/v1/benefits/37` does not appear in the site's public API listing, and its actual functionality is undocumented. The description "Premium API Access" is generic and does not clarify what data or service is returned. No OpenAPI schema, request/response examples, or detailed documentation were found for this endpoint. The docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no additional content.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyhttp-post

Use cases

  • —Accessing a gated API resource with per-call USDC micropayments on Base
  • —Integrating x402-compatible payment flows into agent workflows
  • —Testing x402 protocol payment challenges against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 pay-per-request protocols
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring keyless, no-signup API access

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Applications requiring free or fiat-only payment methods
  • —Anyone needing to understand the exact response payload before paying

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/benefits/37
# Returns 402 with x402 challenge. Attach a valid X-PAYMENT header
# with a USDC payment proof on Base (amount: 20000 base units = $0.02)
# to receive the premium API response.

Endpoint

URLhttps://lowpaymentfee.com/api/v1/benefits/37
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, the specific endpoint /api/v1/benefits/37 is not listed on the site's public catalog, has no documentation, no OpenAPI schema, no request/response examples, and the description 'Premium API Access' is entirely generic. It is impossible to determine what this endpoint actually returns without paying.

Warnings

  • —Endpoint /api/v1/benefits/37 is not listed in the site's public API catalog — its purpose is unknown
  • —No documentation, OpenAPI schema, or response examples are available for this endpoint
  • —All doc/pricing/API pages render only 'Connect wallet' with no substantive content
  • —The description 'Premium API Access' is generic and does not describe actual functionality

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 16:19:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/VFqbUm
x402-gated premium API endpoint on Base, pay-per-call with USDC at $0.02/request. — Clawmart · Clawmart