x402basequality 0.25

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/388

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/388` 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 priced at $0.02 per request.

However, the specific endpoint probed here (`/api/v1/transactions/388`) does not clearly map to any of the documented API categories. Its description is simply "Premium API Access," and no schema, documentation, or example responses are available for this particular path. The docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content. Without further documentation, the actual functionality behind this endpoint remains unclear.

Capabilities

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

Use cases

  • —Programmatic access to paid API endpoints without traditional API key management
  • —Agent-driven workflows that need to pay per call using on-chain USDC
  • —Accessing premium data or services with micropayments on Base L2

Fit

Best for

  • —Developers wanting keyless, pay-as-you-go API access
  • —AI agents with x402-compatible wallets on Base
  • —Low-friction micropayment API consumption

Not for

  • —Users who need detailed API documentation or schemas before integrating
  • —High-volume use cases where per-request pricing may add up
  • —Anyone without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/transactions/388 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/transactions/388
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.25/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and no explanation of what this specific endpoint actually does. The docs pages returned only 'Connect wallet' with no content. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, pricing, and README pages all return only 'Connect wallet' with no content
  • —The endpoint path /api/v1/transactions/388 does not match any of the documented API categories on the landing page
  • —No request or response schema is provided; actual functionality is unknown
  • —No OpenAPI spec, ai-plugin manifest, or agents.txt found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 13:35:11Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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