x402basequality 0.35

x402-gated API platform on Base 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/charges/385

What it does

lowpaymentfee.com is an x402 protocol API platform that provides a collection of pay-per-request 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 priced at $0.02 per request, payable in USDC on the Base network.

The specific endpoint at `/api/v1/charges/385` is listed as "Premium API Access" and returns a live x402 challenge requesting up to 20,000 base units of USDC (0x8335...0913 on Base), which equals $0.02 given USDC's 6 decimals. Payment is made via the x402 exact scheme with no API keys or rate limits required. The platform advertises instant access with no minimums or commitments.

Documentation is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI spec, no request/response schema documentation, and no examples of what the endpoints actually return. The specific functionality behind the `/api/v1/charges/385` "Premium API Access" endpoint is unclear and may be a generic or catch-all route rather than a distinct service.

Capabilities

x402-paymentpay-per-requestusdc-basedata-analyticssentiment-analysistext-summarizationtext-classificationembeddingsprice-feedsexchange-ratesgas-estimatesgeocodingno-api-key

Use cases

  • —Agents needing on-demand AI inference (sentiment, summarization, classification) without subscription commitments
  • —Fetching real-time crypto gas estimates or token price quotes via micropayment
  • —Geocoding or data validation as a lightweight utility call from an autonomous agent
  • —Exporting analytics data or generating reports on a per-request billing basis

Fit

Best for

  • —AI agents that need low-cost, no-auth API access on Base
  • —Developers prototyping with pay-per-use endpoints without signup
  • —Web3-native applications that prefer on-chain micropayments over API keys

Not for

  • —High-volume production workloads needing guaranteed SLAs and detailed documentation
  • —Users who need well-documented request/response schemas before integrating
  • —Applications requiring non-USDC or non-Base payment rails

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/385 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/385
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 challenge, but documentation is essentially nonexistent — all doc pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response schema, and no clarity on what 'Premium API Access' at /api/v1/charges/385 actually returns. The listing is largely a stub.

Warnings

  • —Documentation pages (/docs, /api, /pricing, /README) all render only 'Connect wallet' with no usable content
  • —No OpenAPI or schema documentation available for any endpoint
  • —The specific functionality of /api/v1/charges/385 ('Premium API Access') is undefined — it is unclear what data or service it provides
  • —No request body schema or response examples are available anywhere in the crawl

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:02:07Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/35FYWK
x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart