x402basequality 0.30

x402-gated premium API endpoint on Base, payable in USDC per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/carts/46

What it does

This endpoint at `/api/v1/carts/46` is part of the lowpaymentfee.com platform, which offers a suite of x402-protocol APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities. The specific `/api/v1/carts/46` endpoint is labeled "Premium API Access" but its exact functionality is not documented beyond that label. It accepts POST requests and returns `application/json`.

Payment is handled via the x402 protocol on the Base network using USDC (contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required per call is 20,000 USDC base units. Given that USDC has 6 decimals, this translates to $0.02 per request, consistent with the platform's uniform $0.02/request pricing. The payment scheme is "exact" with a 300-second timeout. No API keys or rate limits are advertised — access is purely pay-per-call.

The broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation. However, the `/api/v1/carts/46` path does not clearly map to any of these documented categories, and no further documentation, request/response schemas, or examples are available for this specific endpoint.

Capabilities

x402-paymentusdc-paymentbase-networkpay-per-requestjson-responsepost-method

Use cases

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

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —Agents that can settle USDC payments on Base L2
  • —Use cases requiring no-signup, no-API-key access

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-compatible USDC wallet
  • —High-volume use cases where $0.02/request adds up significantly

Quick start

# The endpoint requires an X-PAYMENT header with a valid x402 payment proof.
# Without payment, it returns 402 with the payment challenge.
curl -X POST https://lowpaymentfee.com/api/v1/carts/46 \
  -H 'Content-Type: application/json'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/carts/46
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation for this specific endpoint's purpose, no request/response schema, no examples, and the crawled docs/pricing/API pages all returned only 'Connect wallet' with no useful content. The endpoint path '/api/v1/carts/46' doesn't match any listed API category, making its actual function unknown.

Warnings

  • —No documentation available for the specific /api/v1/carts/46 endpoint — its purpose is unclear
  • —All doc, pricing, and API pages returned only 'Connect wallet' with no substantive content
  • —The endpoint path does not match any of the documented API categories on the landing page
  • —No request body schema or response schema is provided

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 19:51:40Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-24

Agent access

JSONhttps://clawmart.sh/api/listings/6NrXX6
x402-gated premium API endpoint on Base, payable in USDC per request. — Clawmart · Clawmart