x402basequality 0.30

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/63

What it does

lowpaymentfee.com is a pay-per-request API platform that gates access to a broad set of endpoints using the x402 payment protocol. The specific endpoint at `/api/v1/lab/results/63` is listed as "Premium API Access" and accepts payment in USDC on the Base network. The x402 challenge confirms the endpoint is live, requiring a maximum of 20,000 base units of USDC (i.e., $0.02) per request. No API keys or rate limits are advertised — 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/63`) falls outside the categories listed on the homepage and its exact functionality is not documented. The name "Premium API Access" and the path segment "lab/results/63" suggest it may return results for a specific lab or experimental resource, but no schema or documentation is available to confirm what data it returns. The endpoint accepts POST requests and returns `application/json`.

Capabilities

x402-paymentpay-per-requestusdc-baseno-api-keyjson-responsepost-method

Use cases

  • —Accessing premium data or lab results behind a per-call paywall
  • —Programmatic pay-as-you-go API consumption without subscriptions
  • —Agent-driven workflows that need instant API access without key provisioning

Fit

Best for

  • —Developers wanting zero-commitment, pay-per-use API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Prototyping and low-volume usage where $0.02/call is cost-effective

Not for

  • —High-volume production workloads where per-call pricing adds up quickly
  • —Users who need detailed documentation or SLA guarantees before integrating
  • —Callers who cannot settle USDC payments on the Base network

Quick start

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

Endpoint

URLhttps://lowpaymentfee.com/api/v1/lab/results/63
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and confirms pricing and payment details, but there is no documentation, no OpenAPI schema, and no description of what this specific endpoint actually returns. The path 'lab/results/63' is not listed among the homepage's advertised APIs, making it effectively a stub listing.

Warnings

  • —No documentation available for the /api/v1/lab/results/63 endpoint — its actual response payload is unknown.
  • —This endpoint path does not appear in the provider's homepage API listing; it may be experimental or unlisted.
  • —No OpenAPI spec, no request/response schema, and no examples are available.
  • —The /pricing and /README pages returned only a 'Connect wallet' prompt with no useful content.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-21 22:32:57Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-21
Last seen2026-04-21

Agent access

JSONhttps://clawmart.sh/api/listings/cfu6nn
Pay-per-call premium API access on Base via x402 — $0.02/request in USDC. — Clawmart · Clawmart