x402basequality 0.35

Pay-per-call API platform on Base network — $0.02/request via x402 USDC payments.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/lab/results/64

What it does

lowpaymentfee.com is a pay-per-request API platform that gates access to a broad set of endpoints behind x402 micropayments settled in USDC on the Base network. The specific endpoint `/api/v1/lab/results/64` is listed under "Premium API Access" and accepts POST requests. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per call (USDC uses 6 decimals). No API keys or rate limits are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The broader platform offers endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, text summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure utilities (geocoding, validation, conversion, generation). All endpoints are uniformly priced at $0.02 per request. This particular endpoint (`/api/v1/lab/results/64`) appears under a "lab/results" path that is not explicitly listed on the homepage, so its exact functionality is unclear — it may be an experimental or internal endpoint.

The endpoint is live and returns a proper 402 challenge. However, there is no OpenAPI schema, no documentation beyond the homepage listing, and no example request/response payloads available. The actual data returned by this endpoint is unknown.

Capabilities

x402-paymentusdc-base-networkpay-per-requestno-api-keypost-methodjson-response

Use cases

  • —Accessing gated data or results via a single micropayment without account signup
  • —Integrating pay-per-call APIs into autonomous agent workflows
  • —Testing x402 payment flows against a low-cost live endpoint

Fit

Best for

  • —Developers experimenting with x402 payment protocol
  • —AI agents that need keyless, pay-as-you-go API access
  • —Low-volume consumers who want no subscription commitments

Not for

  • —Users who need detailed API documentation or guaranteed SLAs
  • —High-volume batch processing where per-request costs add up
  • —Anyone requiring a well-documented, production-grade data pipeline

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/lab/results/64 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/lab/results/64
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live and returns a valid x402 402 challenge, confirming it works. However, there is no OpenAPI schema, no documentation for this specific endpoint path, no example request/response, and the actual functionality of '/api/v1/lab/results/64' is not described anywhere in the crawled material. Effectively a stub listing.

Warnings

  • —The path /api/v1/lab/results/64 is not listed on the provider's homepage — its exact functionality is unknown.
  • —No OpenAPI spec, no request/response examples, and no endpoint-specific documentation available.
  • —Crawled /api, /pricing, and /README pages returned only 'Connect wallet' with no useful content.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:39:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/QFddu6
Pay-per-call API platform on Base network — $0.02/request via x402 USDC payments. — Clawmart · Clawmart