x402basequality 0.30

Pay-per-call API platform on Base network via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/325

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints are priced at $0.02 per request, paid in USDC on the Base network with no API keys, rate limits, or commitments required.

The specific endpoint at `/api/v1/charges/325` is listed as "Premium API Access" and returns a 402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per call, consistent with the site's advertised pricing. Payment is made via the x402 exact scheme with a 300-second timeout.

The broader platform advertises endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and data generation. However, documentation pages (docs, pricing, API, README) all returned minimal content (just "Connect wallet"), so the actual functionality behind each endpoint is unverified. No OpenAPI schema, request/response examples, or detailed documentation were found in the crawl.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsehttp-post

Use cases

  • —Agents needing on-demand API access without pre-registration or API keys
  • —Programmatic access to utility endpoints (geocoding, validation, conversion) with micropayments
  • —Testing x402 payment flows on Base network

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents with x402-compatible wallets on Base
  • —Low-volume or sporadic API consumers who want no commitments

Not for

  • —High-volume production workloads needing guaranteed SLAs and detailed documentation
  • —Users without a Base-network USDC wallet
  • —Anyone needing well-documented, schema-validated API contracts

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/325 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/325
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, and the landing page lists many endpoints at $0.02 each. However, all documentation pages are empty stubs ('Connect wallet'), there is no OpenAPI schema, no request/response examples, and the actual functionality behind 'Premium API Access' at /api/v1/charges/325 is completely undocumented.

Warnings

  • —All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no actual content
  • —No OpenAPI or schema available — request format and response structure are unknown
  • —The specific endpoint /api/v1/charges/325 is not listed among the site's advertised API catalog, making its purpose unclear
  • —Functionality behind advertised endpoints (AI, finance, etc.) is unverified

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:51:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/qBvFMG
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart