x402basequality 0.30

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/transactions/208

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog of endpoints spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint is priced at $0.02 per request, paid in USDC on the Base network with no API keys, no rate limits, and no upfront commitments. The specific endpoint at `/api/v1/transactions/208` is listed as "Premium API Access" and returns `application/json` via POST.

The x402 challenge confirms the endpoint is live, accepting exact-scheme payments of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout. The platform advertises additional endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, conversion, and more — all at the same $0.02 price point.

Documentation is extremely thin: the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no examples available. The exact functionality behind the `/api/v1/transactions/208` path is unclear — the name "Premium API Access" is generic and the crawl provides no details about what data or service it returns.

Capabilities

x402-paymentusdc-base-networkpay-per-requestjson-responseno-api-keypost-method

Use cases

  • —Accessing premium API data without traditional API key registration
  • —Making one-off paid API calls settled in USDC on Base
  • —Agent-driven workflows that need keyless, per-request billing

Fit

Best for

  • —Developers who want instant API access without signup or API keys
  • —AI agents that can settle x402 payments autonomously on Base
  • —Users comfortable paying per-request in USDC

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who need bulk pricing or subscription discounts
  • —Developers who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/208 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/208
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation: no OpenAPI spec, no request/response schemas, no examples, and the endpoint name 'Premium API Access' is completely generic. The docs, pricing, and README pages are all empty beyond a wallet-connect prompt. It is impossible to determine what this specific endpoint actually does.

Warnings

  • —No OpenAPI spec or schema documentation available
  • —All documentation pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no content
  • —The endpoint path '/api/v1/transactions/208' and title 'Premium API Access' are generic — actual functionality is unknown
  • —No request body schema or response schema documented anywhere
  • —Cannot verify what data or service is returned by this endpoint

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:33:16Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/xXP9jp
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart