x402basequality 0.40

x402-gated API marketplace on Base with pay-per-request endpoints at $0.02 each in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/trades/72

What it does

lowpaymentfee.com is an x402-protocol API marketplace that offers a variety of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints are pay-per-request with no API keys, no rate limits, and no commitments required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/trades/72` is listed as "Premium API Access" and accepts POST requests. Payment is settled on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. The x402 challenge was successfully captured with version 1, confirming the endpoint is live.

The broader platform advertises categories including metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02/request price point. Documentation pages exist but appear to require wallet connection to view, so detailed request/response schemas for this specific endpoint are not available from the crawl.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkno-api-keyno-rate-limitpost-endpointjson-response

Use cases

  • —Accessing trade data behind a per-request paywall without needing an API key or subscription
  • —Programmatic agents purchasing API responses on-the-fly using USDC on Base
  • —Integrating low-cost data endpoints into workflows where traditional billing is impractical

Fit

Best for

  • —Agents or bots that need keyless, on-demand API access
  • —Developers who prefer pay-per-use over subscriptions
  • —Use cases requiring Base-network USDC micropayments

Not for

  • —Users who need free or ad-supported API access
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/trades/72 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/72
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.40/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format for this specific endpoint, and all documentation pages behind wallet-connect gates returned no useful content. The endpoint's actual functionality ('trades/72') is opaque beyond the generic 'Premium API Access' label.

Warnings

  • —No request or response schema available — the actual data returned by /api/v1/trades/72 is unknown.
  • —Documentation, pricing, and README pages all require wallet connection and returned no readable content.
  • —The endpoint name 'Premium API Access' is generic and does not describe what trade data or functionality is provided.
  • —The broader site lists many endpoint categories but it is unclear which are actually functional versus placeholder.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:54:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-26

Agent access

JSONhttps://clawmart.sh/api/listings/dNYLrC
x402-gated API marketplace on Base with pay-per-request endpoints at $0.02 each in USDC. — Clawmart · Clawmart