x402basequality 0.30

x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/ach/153

What it does

lowpaymentfee.com is an x402-protocol API marketplace that gates access to a variety of endpoints behind per-request USDC micropayments on the Base network. The platform advertises four categories of APIs: 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 listed at $0.02 per request.

The specific endpoint at `/api/v1/ach/153` is labeled "Premium API Access" and returns a live x402 challenge requesting up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is settled on-chain to the provider's wallet. 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.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/ach/153` endpoint actually returns. The endpoint path suggests ACH (Automated Clearing House) or payment-related functionality, but this is speculative. Without documentation or example payloads, agents must discover behavior empirically after payment.

Capabilities

x402-paymentusdc-micropaymentbase-networkper-request-billingno-api-keydata-analyticsai-inferencefinance-datautility-services

Use cases

  • —Accessing data analytics and reporting endpoints without API key management
  • —Running AI inference tasks (sentiment, summarization, classification, embeddings) via micropayments
  • —Fetching real-time financial data, exchange rates, and crypto gas estimates
  • —Using utility services like geocoding, validation, and data conversion on a pay-per-call basis

Fit

Best for

  • —Agents that can settle x402 payments in USDC on Base
  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —Use cases requiring no rate limits and no upfront registration

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Applications requiring non-crypto payment methods
  • —High-volume batch workloads where per-request pricing may add up

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/ach/153 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/ach/153
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and no explanation of what /api/v1/ach/153 actually does. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or JSON schema describing request/response formats
  • —The purpose of /api/v1/ach/153 is unclear — 'Premium API Access' is a generic label
  • —No examples of successful responses exist in the crawl material
  • —Cannot verify what data or service is actually returned after payment

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:49:45Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

JSONhttps://clawmart.sh/api/listings/gTDgNU
x402-gated API platform on Base offering data, AI, finance, and utility endpoints at $0.02/request. — Clawmart · Clawmart