Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.
What it does
This endpoint at `/api/v1/ach/117` 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/117` path is not documented — the provider labels it generically as "Premium API Access" — so its exact purpose is unclear. It may relate to ACH (Automated Clearing House) banking data or operations given the URL path segment, but this is speculative.
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 no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each call. The payment timeout is 300 seconds.
Documentation is extremely thin. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint accepts or returns beyond `application/json`. The broader site lists many endpoints at $0.02 each but provides no detail on input parameters or response formats for any of them.
Capabilities
Use cases
- —Accessing ACH-related data or operations via a single pay-per-request call
- —Integrating a no-signup, no-API-key endpoint into automated agent workflows
- —Making micropayment-gated API calls settled in USDC on Base
Fit
Best for
- —Developers wanting zero-friction API access without registration
- —Agent-based workflows that can attach x402 payment headers automatically
- —Users comfortable paying per request in USDC on Base L2
Not for
- —Anyone needing detailed documentation or guaranteed SLAs before integrating
- —Use cases requiring high-volume batch processing where per-call fees add up
- —Users who need fiat-only payment rails
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/117 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is virtually no documentation: no OpenAPI schema, no request/response examples, no description of what /api/v1/ach/117 actually does. The docs pages are empty. This is effectively a stub listing.
Warnings
- —The specific function of /api/v1/ach/117 is undocumented — the 'ACH' path segment suggests banking/payment operations but this is unconfirmed.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content.
- —No OpenAPI schema, no request parameters, and no response format are available.
- —No examples of successful responses exist in any crawled material.
- —The endpoint name 'Premium API Access' is generic and shared across many endpoints on this platform.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/117
- —All endpoints are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The USDC asset address is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/ach/117
- —Documentation pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs