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/158` is part of the lowpaymentfee.com platform, which offers a collection of pay-per-call 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/158` path is not documented — the listing title is simply "Premium API Access" and the endpoint lives under an `/ach/` path segment, which may relate to ACH (Automated Clearing House) banking data or operations, but this is unconfirmed.
Pricing is $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which at 6 decimals equals $0.02). There are no API keys, no rate limits, and no minimum commitments — callers pay per request by attaching an x402 payment header. The endpoint accepts HTTP POST and returns `application/json`.
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. Documentation beyond the landing page is essentially empty (all subpages just show "Connect wallet"), so the actual request/response schemas for this and other endpoints are unknown.
Capabilities
Use cases
- —Programmatic access to an ACH-related service with per-request USDC micropayments
- —Agent-driven API consumption without pre-registration or API key management
- —Integrating pay-as-you-go endpoints into automated workflows on Base
Fit
Best for
- —Developers wanting zero-setup, keyless API access with crypto micropayments
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer pay-per-use over subscription billing
Not for
- —Users who need detailed API documentation or request/response schemas before integrating
- —Applications requiring free or fiat-only payment methods
- —High-volume use cases where per-request pricing may add up compared to bulk plans
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/158 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this specific endpoint does, what inputs it accepts, or what it returns. All doc/pricing/README pages are empty beyond a wallet-connect prompt. The purpose of '/api/v1/ach/158' is entirely opaque.
Warnings
- —The specific function of /api/v1/ach/158 is undocumented — the 'ACH' path and numeric ID are unexplained.
- —All documentation pages (docs, api, pricing, README) are effectively empty, showing only 'Connect wallet'.
- —No request or response schema is available; callers cannot know what payload to send or what to expect back.
- —The platform lists many endpoint categories but none match the '/ach/' path of this specific endpoint.
Citations
- —Pricing is $0.02 per request across all listed endpointshttps://lowpaymentfee.com
- —No API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/ach/158