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/96` 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/96` path is not documented — the listing title is simply "Premium API Access" — so the exact data or service it returns is unclear. It may relate to ACH (Automated Clearing House) payment processing or routing data given the URL path, but this is speculative.
The endpoint is live and returns a valid x402 challenge. 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 listed APIs. Payment is made via the x402 `exact` scheme to a specified wallet address on Base. The platform advertises no API keys, no rate limits, and instant access — you pay per call with USDC and receive a JSON response.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this specific endpoint accepts or returns. The `outputSchema` in the x402 challenge confirms it accepts HTTP POST but provides no further detail on request body or response shape.
Capabilities
Use cases
- —Accessing ACH-related data or services on a per-call basis without subscription
- —Agent-driven API consumption with automatic USDC micropayments
- —Integrating pay-per-use endpoints into workflows without managing API keys
Fit
Best for
- —Developers or agents wanting frictionless pay-per-call API access
- —x402-compatible agents that can settle USDC on Base
- —Use cases where avoiding API key management and subscriptions is preferred
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or subscriptions
- —Anyone needing non-crypto payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/96 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-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 actually does. The docs pages are empty beyond a wallet connect prompt. The specific purpose of /api/v1/ach/96 is unknown.
Warnings
- —The exact function of /api/v1/ach/96 is undocumented — the endpoint purpose is unclear
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content
- —No request body schema or response schema is available
- —No examples of successful responses exist in the crawl material
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/96
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/ach/96