x402basequality 0.35

Pay-per-call premium API access on Base via x402 — $0.02/request in USDC.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/lab/results/18

What it does

This endpoint at lowpaymentfee.com provides pay-per-request API access settled via the x402 protocol on the Base network using USDC. The specific resource `/api/v1/lab/results/18` is listed under "Premium API Access" and costs up to $0.02 per call (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each POST request.

The broader lowpaymentfee.com platform offers a suite of endpoints spanning 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 priced at $0.02 per request and settle on the Base network.

The specific content returned by `/api/v1/lab/results/18` is not documented — the endpoint name suggests it returns some form of lab or experimental results identified by ID 18, but no schema or sample response is available. The response MIME type is `application/json`. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` using USDC at contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` on Base.

Capabilities

x402-paymentusdc-basepay-per-requestjson-responseno-api-keyno-rate-limit

Use cases

  • —Accessing premium data results without needing an API key or subscription
  • —Agent-driven workflows that need on-demand paid API calls settled in USDC on Base
  • —Programmatic retrieval of lab/experimental result data behind a paywall

Fit

Best for

  • —Developers wanting zero-friction pay-per-use API access
  • —AI agents with x402-compatible wallets on Base
  • —Users who prefer crypto micropayments over traditional API key subscriptions

Not for

  • —Users who need detailed documentation or response schemas before integrating
  • —High-volume consumers who would benefit from bulk/subscription pricing
  • —Anyone without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/lab/results/18 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Example

Request

{
  "url": "https://lowpaymentfee.com/api/v1/lab/results/18",
  "method": "POST",
  "headers": {
    "X-PAYMENT": "<x402-payment-token>",
    "Content-Type": "application/json"
  }
}

Endpoint

URLhttps://lowpaymentfee.com/api/v1/lab/results/18
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base). However, there is no documentation on what `/api/v1/lab/results/18` actually returns — no response schema, no example payloads, and no OpenAPI spec. The crawled pages beyond the homepage returned only 'Connect wallet' with no useful content. The endpoint's purpose must be guessed from its URL path.

Warnings

  • —No documentation available for the specific endpoint /api/v1/lab/results/18 — its purpose and response format are unknown
  • —No OpenAPI spec, response schema, or example responses provided
  • —The /api, /pricing, and /README pages returned no useful content (just 'Connect wallet')
  • —This endpoint path (lab/results/18) does not appear in the site's listed API catalog, suggesting it may be experimental or unlisted

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:21:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/sKZ6fJ
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart