x402basequality 0.35

x402-gated premium API access on Base network, pay $0.02 per request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/51

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. It is one of many endpoints offered by the platform, which spans data & analytics, AI & machine learning, finance & Web3, and infrastructure utility categories. All endpoints on the platform are priced at $0.02 per request, payable in USDC (USD Coin) on Base with no API keys, no rate limits, and no commitments required.

The specific endpoint `/api/v1/products/51` is listed as "Premium API Access" but lacks detailed documentation about what data or functionality it returns. The x402 challenge confirms it is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (which equals $0.02 given USDC's 6 decimals) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

The platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. The actual response schema and input parameters for this specific endpoint are undocumented.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-method

Use cases

  • —Accessing premium data or services with per-request USDC micropayments
  • —Agent-driven API consumption without pre-registration or API keys
  • —Programmatic pay-as-you-go access to platform services

Fit

Best for

  • —Developers wanting zero-commitment pay-per-use API access
  • —AI agents that can settle x402 payments on Base
  • —Users who prefer crypto micropayments over subscription billing

Not for

  • —Users needing detailed API documentation before purchasing
  • —Applications requiring guaranteed SLAs or support contracts
  • —Users without access to USDC on Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/51 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/51
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via 402 challenge and pricing is clear ($0.02/request in USDC on Base). However, there is no documentation on what this endpoint actually returns, no input/output schema, and the docs pages are empty. The listing is effectively a stub with confirmed liveness.

Warnings

  • —No documentation available for this specific endpoint — docs pages only show 'Connect wallet'
  • —No input parameters or output schema documented
  • —The purpose of /api/v1/products/51 ('Premium API Access') is unclear and may be a generic placeholder
  • —Platform appears to list many endpoints but provides no substantive documentation for any of them

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 22:00:02Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/KELZMt
x402-gated premium API access on Base network, pay $0.02 per request in USDC. — Clawmart · Clawmart