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/129` 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 are gated via the x402 protocol, settling payments in USDC on the Base network. The specific function of the `/api/v1/ach/129` path is not documented beyond the generic label "Premium API Access"; it appears under the ACH route namespace, which may relate to ACH (Automated Clearing House) payment processing or financial data, but this is not confirmed by the available documentation.
The x402 challenge confirms the endpoint is live and accepts POST requests. It requires a maximum payment of 20,000 base units of USDC (0x8335…on Base), which equals $0.02 per request — consistent with the site-wide flat pricing of $0.02/request. The platform advertises no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme to the specified payTo address.
Documentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The actual functionality behind this specific endpoint remains unclear.
Capabilities
Use cases
- —Programmatic ACH-related data retrieval or payment initiation (inferred from route name)
- —Agent-driven financial operations settled per-call in USDC on Base
- —Integrating low-cost pay-per-request financial endpoints without managing API keys
Fit
Best for
- —Developers wanting zero-commitment, pay-as-you-go API access
- —AI agents that can settle x402 payments autonomously on Base
- —Projects needing low-cost per-request financial endpoints
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume use cases where $0.02/request adds up and bulk pricing would be preferred
- —Anyone who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/129 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, no examples, and the actual functionality of /api/v1/ach/129 is unknown. This is effectively a stub listing.
Warnings
- —The specific functionality of /api/v1/ach/129 is undocumented — 'Premium API Access' is a generic label applied across the platform.
- —All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no content.
- —No OpenAPI spec, request schema, or response schema is available.
- —If this endpoint relates to ACH payment processing, it may fall under financial regulation — verify compliance before use.
Citations
- —Flat pricing of $0.02 per request across all 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/129