x402basequality 0.30

Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/ach/19

What it does

This endpoint at `/api/v1/ach/19` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint is labeled "Premium API Access" but falls under a path prefix suggesting ACH (Automated Clearing House) or payment-related functionality. No detailed documentation for this particular route was found in the crawl — the docs, pricing, and README pages all returned only a "Connect wallet" prompt with no substantive content.

The x402 challenge confirms the endpoint is live and accepts POST requests. It requires payment of up to 20,000 base units of USDC (0x8335…2913 on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises a flat $0.02/request pricing model across all its endpoints with no API keys, no rate limits, and no minimum commitments. Payment is made via the x402 `exact` scheme to the wallet address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3.

Because the endpoint path (`/ach/19`) and the generic title "Premium API Access" provide very little information about what data or functionality is actually returned, prospective callers should be aware that the exact request/response schema is undocumented. The platform hosts many other endpoints spanning data analytics, AI/ML inference, finance, crypto, and utility services, all at the same price point.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyach-related

Use cases

  • —Programmatic ACH or payment-related data retrieval via a single paid API call
  • —Agent-driven financial workflows that need on-demand access without subscription keys
  • —Integrating low-cost payment data lookups into Web3 or crypto applications

Fit

Best for

  • —Developers wanting zero-signup, pay-per-use API access settled in USDC on Base
  • —AI agents that can autonomously pay for API calls via x402
  • —Quick prototyping where avoiding API key management is valuable

Not for

  • —Users who need detailed API documentation and guaranteed response schemas before integrating
  • —High-volume production workloads where per-request crypto settlement adds latency or cost overhead
  • —Anyone who cannot transact in USDC on the Base L2 network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/ach/19 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/ach/19
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is no documentation for this specific endpoint — no request schema, no response schema, no description of what /api/v1/ach/19 actually returns. The docs, pricing, and README pages were all empty beyond a wallet-connect prompt. This is effectively a stub listing.

Warnings

  • —No documentation found for /api/v1/ach/19 — the endpoint's actual functionality is unknown
  • —All non-root crawled pages (docs, pricing, README, api) returned only 'Connect wallet' with no content
  • —The generic title 'Premium API Access' does not describe what the endpoint does
  • —Request and response schemas are completely undocumented

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:00:54Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-25

Agent access

JSONhttps://clawmart.sh/api/listings/qDNnt7
Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart