x402basequality 0.35

x402-gated premium API access on Base, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/policies/9

What it does

lowpaymentfee.com hosts a collection of x402-protocol pay-per-call API endpoints on the Base network, settled in USDC. The specific endpoint at `/api/v1/policies/9` is labeled "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0.02 USD) per request. The site advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform offers endpoints across four 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 listed at the same $0.02/request price point.

The `/api/v1/policies/9` endpoint itself is live and responds with a well-formed x402 v1 challenge. However, there is no OpenAPI schema, no documentation beyond the landing page, and no example request/response payloads available. The actual data or functionality returned by this specific "Premium API Access" endpoint is not described anywhere in the crawled material, making it unclear what it does beyond its generic label.

Capabilities

x402-paymentper-request-billingusdc-settlementbase-networkno-api-keypay-per-calljson-response

Use cases

  • —Programmatic access to a pay-per-call API without managing API keys or subscriptions
  • —Agent-driven workflows that need on-demand endpoint access settled in USDC on Base
  • —Testing x402 payment protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need keyless, pay-as-you-go API access
  • —Low-volume callers who want no subscription commitment

Not for

  • —Users who need detailed documentation or guaranteed SLAs
  • —High-volume production workloads where $0.02/request adds up quickly
  • —Anyone who needs to know exactly what data the endpoint returns before paying

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/policies/9 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/policies/9
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no OpenAPI schema, no documentation, no example requests or responses, and the actual functionality of '/api/v1/policies/9' is completely undescribed. The listing is effectively a stub with pricing info only.

Warnings

  • —No documentation available — /docs, /api, /pricing, and /README pages all render only a 'Connect wallet' prompt with no content.
  • —The specific functionality of /api/v1/policies/9 ('Premium API Access') is not described anywhere; it is unclear what data or service it provides.
  • —No OpenAPI schema or request/response examples are available.
  • —No rate limit or uptime guarantees are documented.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 08:04:15Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/Z2mv8R
x402-gated premium API access on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart