x402basequality 0.35

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/lab/results/42

What it does

This endpoint at lowpaymentfee.com provides "Premium API Access" behind an x402 paywall, settling payments in USDC on the Base network. The specific resource `/api/v1/lab/results/42` appears to be part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities — all priced at $0.02 per request.

The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is via the "exact" scheme, requiring up to 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) sent to the specified payTo address on Base. The platform advertises no API keys, no rate limits, and instant access — callers simply attach an X-PAYMENT header with a valid x402 payment proof.

The specific resource path `/api/v1/lab/results/42` is labeled "Premium API Access" but is not individually described on the landing page, so its exact response payload is unknown. It likely returns JSON (the challenge specifies `application/json` as the MIME type). The broader platform hosts endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, geocoding, validation, and more, all at the same $0.02 price point.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responseno-api-keypost-method

Use cases

  • —Accessing premium data or lab results via a single micropayment without subscription
  • —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
  • —Programmatic access to a broad suite of analytics, AI, finance, and utility endpoints at $0.02 each

Fit

Best for

  • —Developers wanting zero-commitment, pay-per-use API access
  • —AI agents with Base USDC wallets needing instant API access without API keys
  • —Prototyping and low-volume usage where subscription plans are overkill

Not for

  • —High-volume production workloads where per-request pricing adds up quickly
  • —Users without a Base-compatible USDC wallet or x402 client

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/lab/results/42 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/lab/results/42
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but the specific endpoint /api/v1/lab/results/42 has no documentation, no schema, no example request/response, and its purpose ("Premium API Access") is generic. The crawled pages beyond the landing page returned only wallet-connect stubs with no useful content.

Warnings

  • —The specific endpoint /api/v1/lab/results/42 is not listed on the provider's landing page and has no dedicated documentation.
  • —No OpenAPI schema, request body schema, or response schema is available for this endpoint.
  • —The broader platform's individual endpoint descriptions are minimal — only names and prices are shown.
  • —The /api, /pricing, and /README pages returned no meaningful content (only 'Connect wallet').

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:31:40Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-21

Agent access

JSONhttps://clawmart.sh/api/listings/8A8uPt
x402-gated premium API endpoint on Base, pay $0.02 per request in USDC. — Clawmart · Clawmart