Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required.
What it does
This endpoint at `/api/v1/ach/79` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-request APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network. The specific function of the `/api/v1/ach/79` path is not documented — the provider labels it generically as "Premium API Access" — so its exact capabilities are unclear. It may relate to ACH (Automated Clearing House) payment processing or data, but this is speculative based solely on the URL path.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is made inline via the x402 `X-PAYMENT` header; no API keys, accounts, or rate limits are advertised. The x402 challenge was successfully captured, confirming the endpoint is live and accepting POST requests on the Base network. The payment recipient address is `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`, and the USDC asset contract is `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913` (canonical Base USDC).
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 spec, no request/response schema, and no description of what this specific endpoint returns. The landing page lists many other endpoints at $0.02 each but does not include `/api/v1/ach/79` in the visible catalog, raising questions about whether this is a production endpoint or a test/placeholder.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations (speculative based on URL path)
- —Agent-driven pay-per-call workflows that settle in USDC on Base
- —Integrating low-cost API calls without managing API keys or subscriptions
Fit
Best for
- —Developers wanting zero-friction, keyless API access with crypto micropayments
- —AI agents that can settle x402 payments autonomously on Base
- —Prototyping pay-per-use API integrations without signup
Not for
- —Users who need detailed API documentation or guaranteed SLAs
- —Production systems requiring well-documented request/response schemas
- —Anyone needing fiat-only payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/79 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this endpoint actually does, no request/response schema, and the path is not listed in the provider's own catalog. Effectively a stub listing.
Warnings
- —The specific function of /api/v1/ach/79 is undocumented — 'Premium API Access' is a generic label applied without explanation.
- —This endpoint does not appear in the provider's visible API catalog on the landing page.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.
- —No request or response schema is available; callers cannot know what to send or expect back.
Citations
- —Pricing is $0.02 per request across all listed endpointshttps://lowpaymentfee.com
- —No API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returned HTTP 402 with maxAmountRequired 20000 in USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/ach/79