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/38` 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/38` endpoint is not documented beyond its listing title "Premium API Access," so its exact purpose is unclear — the "ach" path segment suggests it may relate to ACH (Automated Clearing House) banking or payment data, but this is speculative.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the platform's uniform pricing across all endpoints. There are no API keys, no rate limits, and no subscription commitments — callers simply attach an x402 payment header with each request. The endpoint accepts POST requests and returns `application/json` responses.
Documentation is extremely sparse. The landing page lists available endpoints with one-line descriptions, but the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional technical content. There is no OpenAPI schema, no request/response examples, and no detailed description of what data this endpoint accepts or returns.
Capabilities
Use cases
- —Accessing ACH or payment-related data on a per-call basis without subscription
- —Integrating pay-per-use financial endpoints into agent workflows
- —Testing x402 payment protocol integrations with a low-cost endpoint
Fit
Best for
- —Developers experimenting with x402 payment protocol
- —Agents needing low-cost, no-auth API access on Base
- —Use cases requiring pay-as-you-go pricing without commitments
Not for
- —Users needing well-documented APIs with clear request/response schemas
- —High-volume use cases where per-request pricing may add up
- —Anyone requiring detailed ACH banking integration with guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/38 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge), but documentation is essentially nonexistent — no OpenAPI spec, no request/response examples, and no explanation of what the endpoint actually does. The docs/pricing/README pages are all blank beyond a wallet connect prompt. The endpoint's purpose can only be guessed from its URL path.
Warnings
- —The specific function of /api/v1/ach/38 is undocumented; 'Premium API Access' is a generic label applied to this endpoint
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no technical content
- —No request body schema or response schema is available
- —No OpenAPI or machine-readable specification found
- —The 'ach' path segment may imply regulated financial data (ACH banking), 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
- —The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/ach/38
- —The platform offers endpoints across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com