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/145` 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 function of the `/api/v1/ach/145` path is not documented — the provider labels it generically as "Premium API Access" — so the exact data or service it returns is unclear. The platform advertises a flat $0.02 per request across all its endpoints, and the x402 challenge confirms a `maxAmountRequired` of 20,000 base units of USDC (6 decimals), which equals $0.02.
The broader lowpaymentfee.com site lists endpoints across four categories: Data & Analytics (metrics, reports, data export, insights), AI & Machine Learning (sentiment analysis, summarization, classification, embeddings), Finance & Web3 (price feeds, exchange rates, token quotes, gas estimates), and Infrastructure (geocoding, validation, conversion, generation). All endpoints share the same pricing model: no API keys, no rate limits, no minimums, instant access, payment on Base.
The endpoint is live and returns a valid x402 402 challenge. However, there is no OpenAPI schema, no documentation beyond the landing page listing, and no example request/response payloads available. The `/docs`, `/api`, `/pricing`, and `/README` pages all render only a "Connect wallet" prompt with no additional content. The specific purpose of the `/ach/145` route (possibly ACH payment-related) cannot be confirmed from available materials.
Capabilities
Use cases
- —Programmatic access to an ACH-related service with per-call USDC payment
- —Agent-driven API consumption without pre-registration or API keys
- —Integrating pay-as-you-go endpoints into automated workflows on Base
Fit
Best for
- —Developers wanting zero-signup, pay-per-call API access
- —AI agents that can settle x402 payments in USDC on Base
- —Prototyping workflows that need instant API access without rate limits
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume production use cases where per-call pricing at $0.02 may add up
- —Anyone needing clarity on exactly what data this specific endpoint returns
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/145 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ach/145 actually does, no OpenAPI schema, no example requests or responses, and the docs/pricing/README pages are all empty beyond a wallet-connect prompt. The listing is effectively a stub.
Warnings
- —The specific function of /api/v1/ach/145 is undocumented — 'Premium API Access' is a generic label applied to the endpoint
- —No OpenAPI schema, example payloads, or meaningful documentation available
- —The /docs, /pricing, /api, and /README pages all render only 'Connect wallet' with no content
- —The 'ACH' in the path suggests ACH bank transfer functionality but this cannot be confirmed
Citations
- —The platform charges $0.02 per request with no API keys, no rate limits, and no minimumshttps://lowpaymentfee.com
- —The x402 challenge confirms maxAmountRequired of 20000 base units of USDC (USD Coin) on Base networkhttps://lowpaymentfee.com/api/v1/ach/145
- —The platform lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com