x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/ach/63

What it does

lowpaymentfee.com is an x402-protocol API marketplace that exposes a broad catalog of 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 pay-per-call at $0.02 per request, settled in USDC on the Base network.

The specific endpoint `/api/v1/ach/63` is listed as "Premium API Access" and returns a valid x402 challenge with a maxAmountRequired of 20,000 base units of USDC (0x8335…0913 on Base), which equals $0.02. Payment is made via the x402 exact scheme — no API keys, no rate limits, and no upfront commitments are required. The endpoint accepts POST requests and returns application/json.

Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what the `/api/v1/ach/63` endpoint actually returns. The endpoint path suggests ACH (Automated Clearing House) or payment-related functionality, but this is speculative. Without documentation or example payloads, integrators will need to experiment to discover the actual behavior.

Capabilities

x402-paymentpay-per-requestusdc-settlementbase-networkjson-apino-api-keyno-rate-limit

Use cases

  • —Accessing pay-per-call API endpoints without API key management
  • —Making micropayment-gated requests for data, AI inference, or utility services
  • —Integrating x402-compatible agents with on-chain USDC payments on Base

Fit

Best for

  • —Developers wanting zero-commitment, pay-as-you-go API access
  • —AI agents that can settle x402 payments autonomously on Base
  • —Projects needing simple USDC-based micropayment API integration

Not for

  • —Users who need detailed API documentation or OpenAPI specs before integrating
  • —High-volume use cases where per-request pricing may be inefficient
  • —Users without a Base-compatible USDC wallet

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/ach/63 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

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

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge, confirming pricing and payment details. However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of /api/v1/ach/63 is unclear. The docs pages are empty beyond a wallet-connect prompt, making this effectively a stub listing.

Warnings

  • —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
  • —No OpenAPI or request/response schema provided for this endpoint
  • —The purpose of /api/v1/ach/63 ('Premium API Access') is unclear — the path suggests ACH/payment functionality but this is unconfirmed
  • —No example request or response payloads are available anywhere in the crawl

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 02:03:17Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-23

Agent access

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