x402basequality 0.35

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/payments/44

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, accounts, or rate limits are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/payments/44` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 given USDC's 6 decimals. The payment scheme is "exact" with a 300-second timeout. The endpoint accepts POST requests and returns `application/json`.

The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation — all at the same $0.02 price point. However, documentation beyond the landing page is extremely sparse: the /docs, /api, /pricing, and /README pages all appear to require wallet connection and contain no visible content. Without documentation or schemas for request/response payloads, it is unclear what parameters this specific endpoint expects or what data it returns.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkjson-apino-api-keyno-rate-limit

Use cases

  • —Accessing paid API endpoints without creating accounts or managing API keys
  • —Making one-off API calls with per-request USDC micropayments on Base
  • —Agent-driven workflows that need frictionless pay-as-you-go API access

Fit

Best for

  • —Developers wanting zero-signup API access with crypto payments
  • —AI agents that need to autonomously purchase API calls via x402
  • —Users who prefer pay-per-use over subscription billing

Not for

  • —Users who need detailed API documentation and request/response schemas before integrating
  • —High-volume callers who would benefit from bulk pricing or subscriptions
  • —Users without access to USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/44 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/44
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and no clarity on what this specific endpoint actually does beyond the generic label "Premium API Access." The docs pages are all gated behind wallet connection with no visible content.

Warnings

  • —No API documentation available — /docs, /api, /pricing, and /README pages are empty or wallet-gated
  • —No request or response schema provided for /api/v1/payments/44; unclear what data this endpoint returns
  • —The endpoint name 'Premium API Access' is generic and does not describe its function
  • —Cannot verify what services are actually delivered behind the paywall

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:24:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/bRHU8Q
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart