x402basequality 0.30

Pay-per-request premium API access via x402 on Base network using USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/resource/50

What it does

lowpaymentfee.com offers a collection of pay-per-request API endpoints accessible via the x402 payment protocol on the Base network. The specific endpoint at `/api/resource/50` is described as "Premium API Access" and accepts payment in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maximum amount of 20,000 units (likely 0.02 USDC given 6 decimals). Payment is made via the `exact` scheme, and the endpoint accepts HTTP POST requests.

The broader platform advertises multiple API categories including 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 listed at $0.02 per request with no API keys, no rate limits, and no minimum commitments required.

However, the specific `/api/resource/50` endpoint lacks detailed documentation about what data or functionality it provides. The crawled docs, pricing, and API pages returned only "Connect wallet" with no further content. There is no OpenAPI schema, no request/response examples, and no description beyond the generic "Premium API Access" label. The endpoint is confirmed live via a valid 402 challenge, but the actual behavior behind the paywall is unknown.

Capabilities

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

Use cases

  • —Accessing premium API resources with per-request USDC micropayments on Base
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-as-you-go access to undisclosed premium content

Fit

Best for

  • —Developers wanting zero-signup, pay-per-call API access
  • —AI agents with x402-compatible payment capabilities
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users who need detailed API documentation before purchasing
  • —Applications requiring guaranteed SLAs or support contracts
  • —Anyone needing to know exactly what the endpoint returns before paying

Quick start

curl -X POST https://lowpaymentfee.com/api/resource/50
# Returns 402 with X-PAYMENT challenge
# Supply x402 payment header (USDC on Base, ~0.02 USDC) to access the resource

Endpoint

URLhttps://lowpaymentfee.com/api/resource/50
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid 402 challenge, but there is essentially no documentation about what the endpoint actually does or returns. No OpenAPI schema, no request/response examples, and the docs/pricing/API pages are empty beyond 'Connect wallet'. The listing is effectively a stub with an opaque paywall.

Warnings

  • —No documentation available for /api/resource/50 — the actual functionality behind the paywall is unknown
  • —Docs, pricing, and API pages all render only 'Connect wallet' with no substantive content
  • —No OpenAPI or output schema provided — request format and response structure are entirely unknown
  • —The endpoint path '/api/resource/50' does not match any of the documented API paths on the homepage (which use /api/v1/ and /api/v2/ prefixes)

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:45:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/t6jgCc
Pay-per-request premium API access via x402 on Base network using USDC. — Clawmart · Clawmart