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/177` 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/177` path is not documented — the listing title is simply "Premium API Access" and the path prefix `ach` suggests it may relate to ACH (Automated Clearing House) banking or payment data, but this is unconfirmed.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). There are no API keys, no rate limits, and no minimum commitments advertised. Payment is made inline via the x402 `X-PAYMENT` header, and the endpoint accepts POST requests. The x402 challenge was successfully captured, confirming the endpoint is live.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what data this specific endpoint returns or what input it expects. Prospective callers will need to experiment or contact the provider to understand the request format and response payload.
Capabilities
Use cases
- —Accessing ACH or payment-related data on a per-call basis without subscription
- —Agent-driven API consumption with inline USDC micropayments
- —Programmatic access to financial endpoints without API key management
Fit
Best for
- —Developers who want zero-signup, pay-as-you-go API access
- —AI agents that can settle x402 payments in USDC on Base
- —Users needing low-cost per-request financial data
Not for
- —Users who need detailed API documentation before integrating
- —High-volume consumers who need bulk pricing or rate guarantees
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/177 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation of what this specific endpoint does, no request/response schema, no examples, and the docs pages are empty. The purpose of '/api/v1/ach/177' is entirely unclear beyond the generic 'Premium API Access' label.
Warnings
- —The specific function of /api/v1/ach/177 is undocumented — the 'ach' path and numeric ID are unexplained.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
- —No OpenAPI schema, no request body format, and no response examples are available.
- —This endpoint is not listed among the advertised APIs on the homepage, raising questions about its status.
Citations
- —Pricing is $0.02 per request with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The x402 challenge returns maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base, confirming $0.02 per call.https://lowpaymentfee.com/api/v1/ach/177
- —The platform offers APIs across data/analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com