Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.
What it does
This endpoint at `/api/v1/ach/198` 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/198` path is not documented — the route name suggests ACH (Automated Clearing House) banking functionality, but no schema, parameter list, or response format is provided for this particular endpoint.
The x402 challenge confirms the endpoint is live and accepts POST requests. The price is 20,000 base units of USDC (6 decimals), which equals $0.02 per request. Payment is made via the `exact` scheme to address `0x1A2B...85F3` using the USDC contract on Base (`0x8335...2913`). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.
The broader platform lists endpoints for metrics, reports, data export, insights, sentiment analysis, text summarization, classification, embeddings, price feeds, exchange rates, token quotes, gas estimates, geocoding, validation, conversion, and generation — all at the same $0.02 price point. However, documentation pages (`/docs`, `/pricing`, `/README`) returned only a "Connect wallet" prompt with no substantive content, so the actual capabilities, request schemas, and response formats for any of these endpoints remain unverified.
Capabilities
Use cases
- —Initiating or querying ACH-related banking operations programmatically
- —Agent-driven payment or financial data retrieval without API key management
- —Micropayment-gated access to financial infrastructure services
Fit
Best for
- —Developers wanting keyless, pay-as-you-go API access settled in crypto
- —AI agents that can attach x402 payment headers autonomously
- —Users who need low-cost per-request financial endpoints on Base
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-request fees add up quickly
- —Anyone requiring fiat-only payment rails with no crypto involvement
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/198 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is zero documentation for this specific endpoint — no request schema, no response schema, no description of what /api/v1/ach/198 actually does. All doc pages returned only 'Connect wallet' with no content.
Warnings
- —The specific function of /api/v1/ach/198 is undocumented — the endpoint name suggests ACH banking but this is unverified.
- —All documentation pages (/docs, /pricing, /README) returned no substantive content, only a 'Connect wallet' prompt.
- —No request or response schema is available; callers must discover the API contract by experimentation.
- —If this endpoint involves real ACH bank transfers, it may fall under financial regulation (money transmission, KYC/AML requirements).
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/198
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/198
- —Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs