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/142` 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/142` path is not documented — the listing title is simply "Premium API Access" and no schema or documentation describes what this particular route returns. It may relate to ACH (Automated Clearing House) payment data or routing information given the URL path, but this is speculative.
The x402 challenge is live and well-formed. It requires an exact payment of 20,000 base units of USDC (contract `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 POST request. 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 spec, no request/response schema, and no examples for this or any other endpoint on the platform. Without knowing what input the endpoint expects or what it returns, integration requires trial-and-error or contacting the provider.
Capabilities
Use cases
- —Retrieving ACH-related payment or routing data on a per-request basis
- —Integrating pay-per-call financial data into agent workflows without API key management
- —Testing x402 protocol payment flows on Base with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 protocol payments
- —Agents needing keyless, pay-per-request financial data access
- —Low-volume or sporadic API consumers who want no subscription commitment
Not for
- —High-volume production workloads where $0.02/request adds up quickly
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone needing non-USDC or non-Base-network payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/142 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation for this specific endpoint — no input schema, no output schema, no examples, and no description of what /api/v1/ach/142 actually does. The docs pages are empty. This is effectively a stub listing.
Warnings
- —The specific function of /api/v1/ach/142 is undocumented — the endpoint purpose is unknown beyond the generic 'Premium API Access' title.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.
- —No OpenAPI spec, request schema, or response schema is available for any endpoint on this platform.
- —The 'ach' path segment suggests financial/payment data which may be subject to regulatory requirements — verify compliance before use.
Citations
- —The endpoint returns a 402 x402 challenge requiring 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/ach/142
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/142
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Documentation pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs