x402basequality 0.30

Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/payments/232

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint at `/api/v1/payments/232` is labeled "Premium API Access" and charges up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, accounts, or rate limits are advertised — callers simply attach an x402 payment header to each request.

The broader platform advertises 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 listed at the same $0.02/request price point. Payments settle on-chain to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.

Documentation is extremely sparse — the docs, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/payments/232` endpoint actually returns. The endpoint is live (returns a valid 402 challenge), but without documentation it is unclear what data or functionality this specific route provides.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API data without creating an account or managing API keys
  • —Making one-off paid API calls from autonomous agents using x402 on Base
  • —Integrating pay-per-use endpoints into workflows that settle in USDC

Fit

Best for

  • —Agents or developers who want zero-signup, pay-as-you-go API access
  • —x402-compatible clients on the Base network
  • —Low-volume or sporadic API usage where subscriptions are overkill

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who would benefit from bulk pricing or subscription plans
  • —Developers who cannot transact in USDC on Base

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/232 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/232
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it accepts USDC on Base at $0.02/request. However, there is no OpenAPI schema, no request/response examples, and no documentation beyond a landing page listing endpoint names. The specific functionality of /api/v1/payments/232 ('Premium API Access') is entirely undocumented.

Warnings

  • —No API documentation available — docs, pricing, and README pages all show only 'Connect wallet' with no content.
  • —The purpose and response format of /api/v1/payments/232 is unknown; 'Premium API Access' is not described anywhere.
  • —No OpenAPI or JSON schema provided for request or response bodies.
  • —The platform lists many endpoint categories (AI, finance, analytics, etc.) but provides zero detail on any of them.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:50:28Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/kaE9Mv
Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart