x402basequality 0.30

x402-gated product inventory endpoint on Base, pay-per-request with USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/products/50/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 50) via the x402 payment protocol. It is part of a broader platform that offers dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all gated behind x402 micropayments on the Base network using USDC.

The specific endpoint `/api/v1/products/50/inventory` accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform's landing page confirms uniform $0.02/request pricing across all endpoints, with no API keys, no rate limits, and no minimum commitments required.

Documentation is extremely sparse — the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema documentation, and no usage examples available. The endpoint is confirmed live (returns a proper 402 challenge), but without documentation it is unclear what request body the inventory endpoint expects or what shape the response takes. The listing title "Premium API Access" is the provider's generic description and does not clarify the endpoint's specific functionality.

Capabilities

x402-paymentusdc-micropaymentbase-networkproduct-inventorypay-per-requestno-api-keyjson-response

Use cases

  • —Querying inventory status for a specific product via micropayment
  • —Integrating product availability checks into an agent workflow without API key management
  • —Programmatic inventory monitoring with per-request USDC payments

Fit

Best for

  • —Agents needing on-demand inventory data without subscription commitments
  • —Developers experimenting with x402 micropayment-gated APIs
  • —Low-volume or sporadic inventory queries where per-call pricing is economical

Not for

  • —High-volume inventory polling where per-request fees add up quickly
  • —Use cases requiring detailed API documentation or guaranteed SLAs
  • —Users without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/50/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/50/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 402 challenge and clear pricing ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documentation beyond a wallet-connect prompt, no request/response schema, and no examples. The endpoint's actual functionality (product inventory) is only inferred from the URL path. This is effectively a stub listing.

Warnings

  • —No API documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet'
  • —No OpenAPI or schema definition found; request body format and response shape are unknown
  • —Endpoint purpose inferred solely from URL path '/api/v1/products/50/inventory' — actual functionality unverified
  • —The generic title 'Premium API Access' does not describe what this specific endpoint does

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-18 20:05:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/tHxPMK