x402basequality 0.35

x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/trades/150

What it does

lowpaymentfee.com is an x402 protocol API platform that provides a broad catalog of pay-per-call 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 priced at $0.02 per request, paid in USDC on the Base network.

The specific endpoint at `/api/v1/trades/150` is listed as "Premium API Access" and returns a live 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is via the x402 exact scheme with a 300-second timeout. The platform advertises no API keys, no rate limits, and instant access — authentication and billing are handled entirely through the x402 payment header.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the `/api/v1/trades/150` endpoint actually returns. The endpoint name suggests trade-related financial data (possibly a specific trade record by ID), but this is speculative based solely on the URL path.

Capabilities

x402-paymentpay-per-requestusdc-basetrades-datadata-analyticsai-inferencefinance-datageocodingtext-summarizationsentiment-analysisembeddings

Use cases

  • —Fetching trade data or financial records without API key registration
  • —Agents autonomously purchasing API access via x402 micropayments on Base
  • —Accessing AI inference endpoints (sentiment, summarization, classification) on a per-call basis
  • —Retrieving real-time price feeds and exchange rates with crypto-native billing

Fit

Best for

  • —AI agents that need keyless, pay-per-call API access
  • —Developers wanting to avoid subscription commitments for occasional API calls
  • —Crypto-native applications already operating on the Base network

Not for

  • —High-volume use cases where $0.02/request adds up significantly compared to subscription APIs
  • —Users who need detailed API documentation or guaranteed SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/trades/150 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/trades/150
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI spec, no documentation beyond a landing page listing, no request/response schema, and no examples. The specific purpose of /api/v1/trades/150 is unclear. This is effectively a stub listing.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or schema definition found for any endpoint
  • —The purpose and response format of /api/v1/trades/150 is unknown — 'Premium API Access' is generic
  • —The endpoint path suggests trade data by ID but this is unconfirmed

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 11:37:57Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/P9uQ3L
x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart