x402basequality 0.30

Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/keys/69

What it does

lowpaymentfee.com is an x402-enabled API platform that provides a broad catalog of pay-per-request endpoints settled in USDC on the Base network. The specific endpoint `/api/v1/keys/69` is listed as "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). Payment is handled via the x402 protocol — no API keys, accounts, or subscriptions are required; callers attach an X-PAYMENT header with each request.

The wider platform advertises four endpoint 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 listed endpoints share the same $0.02/request pricing. The platform emphasizes no rate limits, no minimums, and instant access.

Important caveat: the specific endpoint being listed here (`/api/v1/keys/69`) does not clearly map to any of the documented API categories. Its description is simply "Premium API Access," and no schema, request/response examples, or further documentation are available. The crawled docs and pricing pages returned only a wallet-connect prompt with no additional detail. Treat this endpoint as functional but under-documented.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyjson-response

Use cases

  • —Accessing premium API functionality with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, instant API access without subscriptions
  • —Programmatic access to data, AI, finance, or utility endpoints with crypto settlement

Fit

Best for

  • —Developers or agents who want pay-as-you-go API access without signup
  • —Use cases requiring low-cost per-request pricing ($0.02) settled on-chain
  • —Crypto-native applications already operating on the Base L2 network

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Applications that cannot handle USDC payments on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/keys/69 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/keys/69
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no OpenAPI schema, no request/response examples, no documentation beyond a landing page listing, and the specific endpoint '/api/v1/keys/69' has no description beyond 'Premium API Access'. Effectively a stub.

Warnings

  • —No OpenAPI or schema documentation available for this endpoint
  • —The endpoint path '/api/v1/keys/69' does not correspond to any documented API category on the site
  • —No request body schema or response examples are provided anywhere in the crawl
  • —Docs, pricing, and README pages all returned only a 'Connect wallet' prompt with no content
  • —The purpose and functionality of this specific endpoint are unclear

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:17:12Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/4KP8GU
Pay-per-call API platform on Base (USDC) offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart