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/41

What it does

lowpaymentfee.com is an x402-enabled API platform that offers a variety of endpoints across data analytics, AI/ML inference, finance/Web3, and utility services. All endpoints are pay-per-request at $0.02 each, settled in USDC on the Base network. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The specific endpoint at `/api/v1/charges/41` is listed as "Premium API Access" and requires a maximum of 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The x402 challenge confirms the endpoint is live, accepts the `exact` payment scheme on Base, and responds with `application/json`. The payment is directed to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` 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 — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all doc/pricing/API pages just show "Connect wallet"), so the actual functionality, request schemas, and response formats for each endpoint are unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestjson-responseno-api-keyno-rate-limits

Use cases

  • —Accessing miscellaneous API services with per-call USDC micropayments
  • —Testing x402 payment protocol integrations on Base network
  • —Agent-driven API consumption without pre-registration or API keys

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents needing keyless, pay-as-you-go API access
  • —Users who want to avoid subscription commitments for occasional API calls

Not for

  • —Production workloads requiring documented request/response schemas
  • —Users who need detailed API documentation or SDKs
  • —High-volume use cases where per-call pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/41 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/41
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is no documentation, no OpenAPI schema, no request/response examples, and no clarity on what this specific endpoint actually does beyond the generic label "Premium API Access". All documentation pages return only "Connect wallet" with no content.

Warnings

  • —No API documentation available — all doc pages are empty or require wallet connection
  • —No request or response schema provided for any endpoint
  • —The purpose and functionality of /api/v1/charges/41 ('Premium API Access') is entirely unclear
  • —Cannot verify that the advertised AI, analytics, finance, or utility endpoints actually function as described

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:03:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/9UuzDs
Pay-per-call API platform on Base network via x402 — $0.02/request in USDC. — Clawmart · Clawmart