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/199` 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 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no upfront commitments.
The specific function of the `/api/v1/ach/199` path is not documented on the site — the landing page lists endpoints across categories like analytics, AI, finance, and infrastructure, but this particular ACH route does not appear among them. The "ACH" prefix and numeric ID (199) suggest it may relate to ACH (Automated Clearing House) payment processing or lookup, but this is speculative. The x402 challenge confirms the endpoint is live, accepts POST requests, and charges a maximum of 20,000 base units of USDC (i.e., $0.02) per call on the Base network.
The platform's documentation pages (`/docs`, `/pricing`, `/api`, `/README`) all returned only a "Connect wallet" prompt with no substantive content, so there is no schema documentation, request/response examples, or detailed description of what this endpoint returns. Agents should be aware that the actual functionality behind this endpoint is unclear from available materials.
Capabilities
Use cases
- —Querying ACH-related data or initiating ACH-related operations via a single paid API call
- —Integrating pay-per-use financial endpoints into agent workflows without managing API keys
- —Programmatic access to payment or clearing house information on a per-request basis
Fit
Best for
- —Agents needing keyless, pay-per-call access to financial/ACH endpoints
- —Developers prototyping with x402 micropayments on Base
- —Use cases requiring no subscription or rate-limit constraints
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume batch ACH processing where per-request pricing is inefficient
- —Anyone needing non-USDC or non-Base-network payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/199 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but the specific functionality of /api/v1/ach/199 is undocumented. No request/response schema, no docs content, and the endpoint doesn't appear in the site's own API listing. This is effectively a stub listing.
Warnings
- —The /api/v1/ach/199 endpoint is not listed among the provider's documented APIs — its actual functionality is unknown.
- —All documentation pages (/docs, /pricing, /api, /README) returned only 'Connect wallet' with no usable content.
- —No request or response schema is available; callers cannot know what to send or what to expect back.
- —The 'ACH' designation may relate to regulated financial services (Automated Clearing House); verify compliance requirements before use.
Citations
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The x402 challenge confirms the endpoint is live, accepts POST, and requires a max of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base.https://lowpaymentfee.com/api/v1/ach/199
- —The /api/v1/ach/199 endpoint does not appear in the provider's listed API catalog.https://lowpaymentfee.com