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/35

What it does

lowpaymentfee.com hosts a suite of x402-protocol pay-per-call APIs spanning data analytics, AI/ML inference, finance/crypto market data, and general utilities. Every endpoint is gated by the x402 payment challenge: callers attach a USDC payment on the Base network 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/35` is listed as "Premium API Access" and accepts POST requests. The x402 challenge advertises a maximum amount of 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals), which equals $0.02 per request. The site's landing page confirms a flat $0.02/request price across all endpoints.

The broader platform also offers endpoints for sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. Documentation pages beyond the landing page returned only a "Connect wallet" prompt with no further technical detail, so the exact request/response schemas for this collection endpoint are unknown.

Capabilities

x402-paymentpay-per-requestusdc-baseno-api-keydata-analyticsai-inferencefinance-datacrypto-datautility-apispost-endpoint

Use cases

  • —Agents that need on-demand data or AI inference without managing API keys or subscriptions
  • —Programmatic access to analytics, sentiment analysis, or summarization with per-call crypto payment
  • —Fetching real-time crypto gas estimates or token quotes via a single USDC micropayment
  • —Geocoding or data conversion utilities paid per request on Base

Fit

Best for

  • —AI agents with Base USDC wallets needing frictionless API access
  • —Developers who want pay-as-you-go pricing without signup or rate limits
  • —Prototyping workflows that combine multiple API categories (AI, finance, utilities) under one payment scheme

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/35 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/collections/35
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is live (402 challenge captured) 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/35' specifically is opaque. The docs, pricing, and README pages all returned only 'Connect wallet' with no content.

Warnings

  • —No request or response schema available — the exact payload format for /api/v1/collections/35 is unknown.
  • —Documentation pages (/docs, /pricing, /README, /api) returned no useful content beyond 'Connect wallet'.
  • —The generic name 'Premium API Access' gives no indication of what data or functionality this specific endpoint provides.
  • —No SLA, rate-limit, or uptime guarantees documented.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 18:02:50Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-19
Last seen2026-04-22

Agent access

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