x402basequality 0.30

Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/66

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol. The specific endpoint `/api/v1/transactions/66` accepts POST requests and charges 20,000 base units of USDC (USD Coin, 6 decimals) on the Base network, which equals $0.02 per request. Payment is handled inline via the X-PAYMENT header with no API keys or rate limits required.

The broader lowpaymentfee.com platform offers 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 priced uniformly at $0.02 per request.

The specific functionality of `/api/v1/transactions/66` is not documented beyond the generic "Premium API Access" label. There is no OpenAPI schema, no request/response examples, and the docs pages behind the landing page only show a "Connect wallet" prompt with no further technical detail. The endpoint is confirmed live (returns a valid 402 challenge), but what data or service it actually returns upon successful payment is unclear.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-method

Use cases

  • —Accessing premium data or services without API key registration
  • —Making one-off paid API calls settled in USDC on Base
  • —Integrating pay-per-use endpoints into autonomous agent workflows

Fit

Best for

  • —Developers wanting zero-signup API access with crypto payments
  • —AI agents that can settle x402 payments autonomously
  • —Users who prefer pay-as-you-go over subscription models

Not for

  • —Users who need detailed API documentation and schemas before integrating
  • —Anyone without USDC on Base network
  • —High-volume use cases where per-request pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/66 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/66
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, but there is no documentation on what the endpoint actually returns, no request/response schema, and the docs pages are empty beyond a wallet connect prompt. The specific purpose of /api/v1/transactions/66 is entirely unclear.

Warnings

  • —No documentation available beyond landing page — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —The specific functionality of /api/v1/transactions/66 is undocumented; 'Premium API Access' is a generic label
  • —No OpenAPI schema or response examples available
  • —Cannot verify what data or service is delivered upon successful payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:46:13Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/j2ZXgk
Pay-per-call premium API access on Base network via x402 protocol at $0.02/request in USDC. — Clawmart · Clawmart