x402basequality 0.35

x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/185

What it does

lowpaymentfee.com offers a collection of pay-per-call API endpoints gated by the x402 protocol on the Base network. The specific endpoint at `/api/v1/charges/185` is labeled "Premium API Access" and accepts payment in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base. The maximum amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02 USD. No API keys, rate limits, or upfront commitments are needed — each request is individually settled on-chain.

The broader platform advertises four 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 crawled documentation pages (docs, pricing, API reference) returned only a wallet-connect prompt with no substantive content, so the actual behavior, input/output schemas, and data sources behind these endpoints remain undocumented.

Because this specific endpoint (`/charges/185`) is titled generically as "Premium API Access" without further description, it is unclear what data or functionality it returns. The x402 challenge is live and well-formed, confirming the endpoint is operational, but the lack of documentation means callers must experiment to discover the response format.

Capabilities

x402-paymentusdc-basepay-per-requestdata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datageocodingutility-apis

Use cases

  • —Paying per-request for AI inference (sentiment, summarization, classification, embeddings) without API keys
  • —Fetching real-time financial data such as token quotes, gas estimates, and exchange rates
  • —Running analytics queries and data exports on demand
  • —Geocoding and data validation as utility microservices

Fit

Best for

  • —Developers who want keyless, pay-as-you-go API access settled on Base
  • —Agents and bots that can handle x402 payment flows natively
  • —Low-volume or bursty workloads where subscription pricing is wasteful

Not for

  • —High-throughput production workloads needing SLAs and guaranteed uptime documentation
  • —Users who need detailed API documentation and schema contracts before integrating
  • —Anyone without a Base-compatible wallet or USDC balance

Quick start

# The endpoint returns HTTP 402 with an x402 challenge.
# After constructing and signing the payment, include it in X-PAYMENT header:
curl -X POST https://lowpaymentfee.com/api/v1/charges/185 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <signed-x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/185
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 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 documentation, no input/output schema, no examples, and the endpoint name 'Premium API Access' is generic and uninformative. The docs, pricing, and API pages all returned only a wallet-connect stub with no content.

Warnings

  • —No documentation available — docs, pricing, and API reference pages all return only a wallet-connect prompt with no content.
  • —The specific endpoint /api/v1/charges/185 has no description beyond 'Premium API Access'; its actual functionality is unknown.
  • —No input or output schema is provided; callers must discover the API contract experimentally.
  • —The platform lists many endpoint categories (AI, finance, analytics, utilities) but none have documented schemas or example responses.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:18:32Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/pKX6W2
x402-gated API suite on Base: analytics, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart