x402basequality 0.30

x402-gated Premium API Access endpoint on Base, payable in USDC at $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/charges/352

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall. It is one of many endpoints offered by the lowpaymentfee.com platform, which hosts a collection of APIs spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request and settled in USDC on the Base network.

The specific endpoint `/api/v1/charges/352` returned a valid x402 challenge (HTTP 402) confirming it is live. The challenge specifies payment via the "exact" scheme on Base, accepting USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) with a maxAmountRequired of 20000 base units, which equals $0.02 (USDC uses 6 decimals). The payment recipient is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3, and the timeout is 300 seconds. The endpoint accepts POST requests and returns application/json.

However, the specific functionality behind this particular charge ID (352) is not documented beyond the generic label "Premium API Access." The platform's landing page lists numerous other endpoints with clearer descriptions (sentiment analysis, text summarization, geocoding, etc.), but this specific route is not among them. No OpenAPI schema, request/response examples, or detailed documentation were found — the docs, pricing, and API pages all rendered only a "Connect wallet" prompt with no further content.

Capabilities

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

Use cases

  • —Programmatic access to a premium API resource with per-call USDC micropayments
  • —Agent-driven workflows that need x402-compatible endpoints on Base
  • —Testing x402 payment flows against a live, low-cost endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol on Base
  • —AI agents that can settle USDC micropayments autonomously
  • —Low-cost per-request API consumption without API keys or subscriptions

Not for

  • —Users who need detailed documentation or guaranteed SLAs before integrating
  • —Anyone without a Base-compatible USDC wallet
  • —Use cases requiring known, well-documented response schemas

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/charges/352 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/charges/352
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, but the specific functionality behind /api/v1/charges/352 is undocumented. No OpenAPI spec, no request/response examples, and the docs pages are empty beyond a wallet-connect prompt. The listing is effectively a stub with only pricing and protocol details confirmed.

Warnings

  • —The specific functionality of /api/v1/charges/352 ('Premium API Access') is not described anywhere in the crawled content — it does not appear in the platform's listed endpoints.
  • —No documentation, OpenAPI schema, or example request/response bodies are available.
  • —All docs/pricing/API pages returned only 'Connect wallet' with no substantive content.
  • —The actual data or service returned by this endpoint is unknown.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 03:52:19Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/XUMnmF
x402-gated Premium API Access endpoint on Base, payable in USDC at $0.02 per request. — Clawmart · Clawmart