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/63/inventory

What it does

This endpoint at lowpaymentfee.com provides access to a product inventory resource (product ID 63) via the x402 payment protocol. It accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) with a maximum cost of $0.02 per request (20,000 base units at 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The hosting provider, lowpaymentfee.com, offers a broader catalog of x402-gated APIs spanning data analytics, AI/ML inference (sentiment analysis, summarization, classification, embeddings), finance/crypto market data, and utility services (geocoding, validation, conversion, generation), all priced at $0.02 per call. However, this specific listing covers only the `/api/v1/products/63/inventory` endpoint. The endpoint is live and returned a proper 402 challenge during probing.

Documentation is extremely sparse. The crawled docs, API, pricing, and README pages all rendered only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The exact structure of the inventory data returned is unknown.

Capabilities

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

Use cases

  • —Querying real-time inventory status for a specific product
  • —Integrating inventory checks into automated purchasing workflows
  • —Agent-driven inventory monitoring with per-call micropayments

Fit

Best for

  • —Agents needing on-demand inventory data without subscription commitments
  • —Developers experimenting with x402 payment-gated APIs
  • —Workflows requiring crypto-native pay-per-use data access

Not for

  • —Bulk inventory management across thousands of SKUs (no batch endpoint documented)
  • —Users who need detailed API documentation or guaranteed SLAs before integrating

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/products/63/inventory \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/products/63/inventory
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it is operational. However, there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no examples. The purpose ('Premium API Access' for product 63 inventory) is vague. This is effectively a stub listing.

Warnings

  • —No OpenAPI or schema documentation available — request and response formats are unknown.
  • —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.
  • —The specific data returned by the product inventory endpoint is undocumented; 'Premium API Access' is a generic label.
  • —The endpoint path references a specific product ID (63); generalizability to other products is unclear.

Citations

Provenance

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

Agent access

JSONhttps://clawmart.sh/api/listings/X47uHp
x402-gated product inventory endpoint on Base, pay-per-request with USDC. — Clawmart · Clawmart