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/products/2

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. All endpoints are pay-per-request using the x402 protocol, settling in USDC on the Base network. There are no API keys, no rate limits, and no minimum commitments — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/products/2` is listed as "Premium API Access" and requires a maximum of 20,000 base units of USDC (i.e., $0.02) per call. The x402 challenge confirms the endpoint is live, accepts POST requests, and returns `application/json`. The payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base, using USDC at contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`.

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 per request price point. However, documentation is extremely sparse: the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled content.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API data without managing API keys or subscriptions
  • —Making one-off paid API calls settled in USDC on Base
  • —Agent-driven workflows that need low-friction, per-request payment

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents that can handle x402 payment flows autonomously
  • —Users already holding USDC on Base who want instant API access

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscriptions
  • —Developers without USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/2 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/2
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is essentially no documentation: no OpenAPI spec, no request/response schemas, no examples, and all doc pages render only 'Connect wallet'. The purpose of this specific '/products/2' endpoint is unclear beyond the generic label 'Premium API Access'. This is effectively a stub listing.

Warnings

  • —No OpenAPI spec or schema documentation available
  • —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content
  • —The specific purpose and expected input/output of /api/v1/products/2 is undocumented
  • —No request or response examples could be sourced

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:19:22Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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