x402basequality 0.30

Pay-per-call API platform on Base 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/16

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/16` is labeled "Premium API Access" and charges up to $0.02 per call (20,000 base units of USDC with 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.

The broader platform offers 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 listed at $0.02 per request.

Documentation is extremely sparse — the docs, API, 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 detailed description of what the `/api/v1/payments/16` endpoint specifically returns. The x402 challenge is live and well-formed, confirming the endpoint accepts POST requests and settles in USDC on Base to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypost-methodjson-response

Use cases

  • —Accessing premium API endpoints without managing API keys or subscriptions
  • —Making one-off paid API calls settled in USDC on Base
  • —Integrating pay-per-request services into agent workflows via x402

Fit

Best for

  • —Developers who want frictionless pay-per-call access without signup
  • —AI agents that can settle x402 payments autonomously
  • —Users already holding USDC on the Base network

Not for

  • —Users needing detailed API documentation or OpenAPI specs before integrating
  • —High-volume callers who prefer subscription-based pricing over per-request fees

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/16 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/16
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documentation beyond a wallet-connect prompt, no request/response examples, and no description of what this specific endpoint actually returns. The listing is effectively a stub.

Warnings

  • —No OpenAPI or schema documentation available — all docs/pricing/README pages render only 'Connect wallet'
  • —The specific functionality of /api/v1/payments/16 ('Premium API Access') is not described anywhere
  • —No request body schema or response examples are available
  • —The platform lists many endpoints but provides no technical details for any of them

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 06:38:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/Y7NzZG
Pay-per-call API platform on Base via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart