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/172` 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/172` endpoint is not documented beyond the generic label "Premium API Access"; it appears to be one of many endpoints on the platform, though it is not listed among the publicly advertised APIs on the homepage. The "ach" path segment suggests it may relate to ACH (Automated Clearing House) payment processing or banking data, but this is speculative.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), paid via the x402 exact payment scheme. The platform advertises no API keys, no rate limits, no minimums, and instant access. Payment is made by including an X-PAYMENT header with each request. The endpoint accepts HTTP POST and returns application/json.
Documentation is extremely sparse — 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 actually does or what parameters it accepts. The endpoint is live (returns a proper 402 x402 challenge), but without documentation it is difficult to use effectively.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations (speculative based on URL path)
- —Agent-driven pay-per-call API consumption without pre-registration
- —Integrating USDC micropayment-gated services into automated workflows
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents with x402-compatible payment capabilities on Base
- —Users who prefer crypto micropayments over subscription billing
Not for
- —Users who need detailed API documentation before integrating
- —High-volume use cases where per-request pricing may add up
- —Anyone requiring guaranteed SLAs or support
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/172 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is virtually no documentation: no OpenAPI schema, no request/response examples, no description of what the endpoint does, and the docs pages are empty. The specific endpoint path (/api/v1/ach/172) is not listed among the advertised APIs, making its purpose unclear.
Warnings
- —The specific function of /api/v1/ach/172 is undocumented — the 'ach' path suggests ACH payment processing but this is unconfirmed
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no content
- —This endpoint is not listed among the publicly advertised APIs on the homepage
- —No request or response schema is available — callers cannot know what parameters to send
- —If this endpoint relates to ACH/banking operations, it may fall under financial regulation
Citations
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base networkhttps://lowpaymentfee.com/api/v1/ach/172
- —Docs, API, pricing, and README pages contain only 'Connect wallet' with no substantive documentationhttps://lowpaymentfee.com/docs