x402basequality 0.30

Premium API access via x402 payment on Base network, settling in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/stripe/subscriptions/139

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" gated behind an x402 payment challenge. The endpoint accepts POST requests and settles payments in USDC on the Base network. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 per request.

The broader lowpaymentfee.com platform offers a suite of pay-per-request APIs spanning 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 advertised at $0.02 per request with no API keys, no rate limits, and instant access via the x402 protocol on Base.

The specific endpoint `/api/v1/stripe/subscriptions/139` is labeled "Premium API Access" but no further documentation describes what data or functionality it returns. The docs, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical detail. Without schema documentation or example responses, the actual payload returned after payment is unknown.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestpost-method

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments
  • —Integrating pay-as-you-go API access without traditional API keys or subscriptions
  • —Agent-driven programmatic access to gated resources via x402 protocol

Fit

Best for

  • —Developers wanting keyless, pay-per-use API access
  • —AI agents that can settle x402 payments autonomously
  • —Users on Base network with USDC who want instant access without signup

Not for

  • —Users needing detailed API documentation or response schemas before purchasing
  • —Applications requiring free-tier or trial access
  • —Users without USDC on Base network

Quick start

# Send a POST with x402 payment header to access the endpoint
curl -X POST https://lowpaymentfee.com/api/v1/stripe/subscriptions/139 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/stripe/subscriptions/139
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns 402 challenge correctly) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation on what the endpoint actually returns, no OpenAPI schema, no example responses, and the docs/pricing/README pages are all empty beyond a wallet connect prompt. The endpoint path ('stripe/subscriptions/139') is opaque and unexplained.

Warnings

  • —No documentation available describing what this endpoint returns after payment
  • —Docs, pricing, and README pages render only 'Connect wallet' with no content
  • —The endpoint path references 'stripe/subscriptions' which is unclear in context of x402 crypto payments
  • —No response schema or example output available

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 10:47:04Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4rWeMB
Premium API access via x402 payment on Base network, settling in USDC. — Clawmart · Clawmart