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/183` 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/183` 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 processing given the URL path, but this is speculative.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is handled inline via the x402 `X-PAYMENT` header — no API keys, accounts, or rate limits are advertised. The endpoint accepts POST requests and returns `application/json`. The x402 challenge is live and well-formed, with a 300-second payment timeout window. Settlement goes to address `0x1A2B...85F3` on Base.
Documentation is extremely thin. The `/docs`, `/pricing`, `/api`, 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 usage examples. Without knowing what this endpoint actually does or what input it expects, integration requires trial-and-error or contacting the provider.
Capabilities
Use cases
- —Accessing ACH-related data or functionality on a per-request basis without subscription
- —Integrating a low-cost pay-per-call endpoint into an agent workflow via x402
- —Testing x402 protocol integration with a live USDC-settled endpoint on Base
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing low-cost per-request API access without API key management
- —Use cases where pay-as-you-go pricing at $0.02/call is attractive
Not for
- —Users who need documented request/response schemas before integrating
- —High-volume use cases where per-request pricing adds up versus flat-rate plans
- —Anyone needing guaranteed SLA or support — no documentation or contact info available
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/183 \
-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 on what this endpoint actually does, what inputs it expects, or what it returns. No OpenAPI spec, no examples, no request/response schema. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README pages all show only 'Connect wallet' with no content
- —The specific function of /api/v1/ach/183 is unknown; 'Premium API Access' is a generic title
- —No request or response schema provided; integration requires guesswork
- —No OpenAPI or AI plugin manifest found
- —The 'ACH' in the path suggests possible financial/payment functionality but this is unconfirmed
Citations
- —Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (6 decimals = $0.02) on Basehttps://lowpaymentfee.com/api/v1/ach/183
- —The platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompthttps://lowpaymentfee.com/docs