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/72

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 `/api/v1/payments/72` is listed as "Premium API Access" and charges up to 20,000 base units of USDC (i.e., $0.02 given USDC's 6 decimals) per call. No API keys, rate limits, or upfront commitments are required — each request is settled individually via an on-chain micropayment.

The broader platform advertises several categories of endpoints: 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 listed endpoints share the same $0.02/request pricing.

However, the specific functionality behind `/api/v1/payments/72` is not documented beyond the label "Premium API Access." The crawled docs, pricing, and API pages all returned only a "Connect wallet" prompt with no further technical documentation, schemas, or example payloads. Without additional documentation it is unclear what data or service this particular endpoint returns when a valid payment is submitted.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keymicropaymentjson-response

Use cases

  • —Programmatic access to premium API services with per-call USDC micropayments
  • —Agent-driven workflows that need keyless, on-demand API access settled on Base
  • —Testing x402 protocol integrations with a low-cost endpoint

Fit

Best for

  • —Developers exploring x402 pay-per-call patterns
  • —AI agents that can settle USDC payments on Base autonomously
  • —Users who want no-commitment, no-signup API access

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before paying
  • —High-volume use cases where $0.02/request adds up and a subscription would be cheaper
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/payments/72 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/payments/72
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no example request/response payloads, and the actual functionality behind 'Premium API Access' is undefined. The docs/pricing/API pages all render only a wallet-connect prompt with no useful content.

Warnings

  • —No documentation available — docs, pricing, and API pages all return only a 'Connect wallet' prompt with no technical content.
  • —The specific functionality of /api/v1/payments/72 ('Premium API Access') is not described anywhere; it is unclear what data or service is returned upon successful payment.
  • —No OpenAPI schema, request/response examples, or input parameters are documented.
  • —The platform lists many endpoint categories (AI, finance, analytics, etc.) but none have visible documentation to verify they actually function.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 07:20:31Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/Cq4HMp
Pay-per-call API platform on Base (USDC) via x402 — $0.02/request, no API keys required. — Clawmart · Clawmart