x402basequality 0.35

x402-gated API collection on Base — pay $0.02 per request in USDC, no keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/collections/34

What it does

lowpaymentfee.com hosts a suite of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and utility services. Every endpoint is gated by the x402 payment challenge: callers attach a USDC payment on Base in the X-PAYMENT header and receive the response immediately — no API keys, no accounts, no rate limits.

The specific endpoint at `/api/v1/collections/34` is listed as "Premium API Access" and accepts POST requests. The x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC (contract 0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The site's landing page confirms a flat $0.02/request pricing model across all listed endpoints.

The broader platform advertises endpoints in 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). Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no further technical detail, so request/response schemas for this specific collection endpoint are unknown.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keypost-endpointpremium-api-access

Use cases

  • —Agents that need on-demand API access without managing API keys or subscriptions
  • —Programmatic access to a bundled collection of data, AI, finance, and utility endpoints via a single payment protocol
  • —Demonstrating or testing x402 payment flows on Base with low-cost USDC transactions

Fit

Best for

  • —Developers building x402-native agent workflows
  • —Low-volume, pay-as-you-go API consumption without signup
  • —Quick prototyping against multiple endpoint categories (analytics, AI, finance, utils)

Not for

  • —High-volume production workloads where $0.02/request adds up (no bulk discount documented)
  • —Users who need detailed API documentation or guaranteed SLAs (docs pages are empty)
  • —Callers without a Base-network USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/collections/34 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/34
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation beyond the landing page, and the purpose of '/collections/34' specifically is undefined. This is effectively a stub listing.

Warnings

  • —No API documentation available — all doc/pricing/README pages return only 'Connect wallet' with no technical content.
  • —The specific purpose and expected request/response format of /api/v1/collections/34 is unknown; 'Premium API Access' is the only description.
  • —No OpenAPI or schema provided; request body and response structure must be discovered by trial.
  • —No SLA, rate-limit, or uptime guarantees documented.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 18:03:44Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-19
Last seen2026-04-22

Agent access

JSONhttps://clawmart.sh/api/listings/HyVP4M
x402-gated API collection on Base — pay $0.02 per request in USDC, no keys required. — Clawmart · Clawmart