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/85` is part of the lowpaymentfee.com platform, which offers a broad catalog 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/85` path is not documented beyond the generic label "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). There are no API keys, no rate limits, and no minimum commitments advertised. Payment is made inline via the x402 `X-PAYMENT` header on each call. The endpoint accepts POST requests and returns `application/json`.
Documentation is extremely thin — the docs, pricing, API, and README pages all resolve to a "Connect wallet" prompt with no further content. There is no OpenAPI schema, no request/response examples, and no description of what data this endpoint actually returns. The endpoint is live (returns a valid 402 challenge), but without documentation it is difficult to use productively.
Capabilities
Use cases
- —Accessing ACH or payment-related data on a per-request basis without subscription
- —Integrating pay-per-call 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 per-call API access without API key management
- —Use cases requiring USDC-settled micropayments on Base
Not for
- —Users who need detailed API documentation or schemas before integrating
- —High-volume production workloads where undocumented endpoints pose risk
- —Anyone needing non-crypto payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/85 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is live and returns a valid x402 402 challenge, but there is zero documentation on what the endpoint actually does, what inputs it expects, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The 'ach/85' path and 'Premium API Access' label are the only clues to functionality.
Warnings
- —The specific function of /api/v1/ach/85 is completely undocumented — the 'ach' path and 'Premium API Access' label provide no actionable detail.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no content.
- —No OpenAPI schema, request format, or response examples are available.
- —The endpoint path suggests possible ACH/banking data which may fall under financial regulation — exercise caution.
Citations
- —Pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge advertises maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Base network.https://lowpaymentfee.com/api/v1/ach/85
- —The platform offers APIs across data analytics, AI/ML, finance/Web3, and infrastructure categories.https://lowpaymentfee.com
- —Documentation pages resolve to a 'Connect wallet' prompt with no further content.https://lowpaymentfee.com/docs