x402basequality 0.35

Pay-per-call API platform on Base via x402 — 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/182

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a broad catalog 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, paid in USDC on the Base network.

The specific endpoint at `/api/v1/charges/182` is listed as "Premium API Access" and returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02. Payment is made via the x402 exact scheme — no API keys, subscriptions, or rate limits are 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 further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available from the crawled material. It is unclear what specific data or functionality the `/api/v1/charges/182` "Premium API Access" endpoint returns, as it does not map to any of the named endpoints listed on the homepage.

Capabilities

x402-paymentpay-per-requestusdc-basedata-analyticsai-inferencesentiment-analysistext-summarizationclassificationembeddingsfinance-datageocodingno-api-key

Use cases

  • —Accessing AI inference (sentiment, summarization, classification, embeddings) without API key management
  • —Fetching real-time financial data like token quotes, gas estimates, and exchange rates on a per-call basis
  • —Running utility operations like geocoding, validation, and data conversion with micropayments
  • —Integrating pay-per-use data analytics into agent workflows

Fit

Best for

  • —Agents or developers who want zero-commitment, pay-as-you-go API access
  • —Use cases requiring no rate limits and no API key provisioning
  • —Crypto-native applications already operating on the Base network

Not for

  • —Users needing detailed API documentation or guaranteed SLAs before integration
  • —High-volume consumers who would benefit from bulk pricing or subscription plans
  • —Anyone unable to pay in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/182 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/182
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/pricing/API pages show only 'Connect wallet'. There is no OpenAPI spec, no request/response examples, and the specific purpose of the /api/v1/charges/182 'Premium API Access' endpoint is unclear since it doesn't match any named endpoint on the homepage.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all render only 'Connect wallet'
  • —No OpenAPI or schema specification found
  • —The endpoint path /api/v1/charges/182 does not correspond to any of the named endpoints listed on the homepage; its actual functionality is unknown
  • —No request or response examples available to verify what data is returned

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:23:41Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/a8nxaU
Pay-per-call API platform on Base via x402 — data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart