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/transactions/233

What it does

lowpaymentfee.com is a pay-per-request API platform that uses the x402 protocol to accept USDC payments on the Base network. The specific endpoint `/api/v1/transactions/233` is listed as "Premium API Access" and returns a 402 challenge requiring payment of up to 20,000 base units of USDC (i.e., $0.02) per call. No API keys or rate limits are required; callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform advertises multiple API categories including 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 uniformly priced at $0.02 per request.

However, the specific functionality behind `/api/v1/transactions/233` is unclear — the description is simply "Premium API Access" with no further documentation, input schema, or example responses available. The docs, pricing, and API pages on the site all render only a "Connect wallet" prompt with no additional technical content. Without paying for a request and inspecting the response, the actual data returned by this endpoint remains unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium API data with per-request USDC micropayments on Base
  • —Agent-driven workflows that need keyless, pay-as-you-go API access
  • —Testing x402 protocol integrations against a live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that need instant, keyless API access via crypto micropayments
  • —Low-volume consumers who prefer pay-per-use over subscriptions

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume consumers who need bulk pricing or rate-limit guarantees
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/233 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/233
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no input/output schema, no example responses, and the actual functionality behind this specific endpoint path is entirely undocumented. The docs pages render only a wallet-connect prompt.

Warnings

  • —No documentation available — docs, pricing, and API pages all show only 'Connect wallet' with no technical content.
  • —The specific functionality of /api/v1/transactions/233 is unknown; 'Premium API Access' is the only description provided.
  • —No input or output schema is documented; callers cannot know what data to send or expect back without trial and error.
  • —The platform lists many endpoint categories (AI, analytics, finance, etc.) but none have visible documentation.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 12:53:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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