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/41` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.
The specific `/api/v1/ach/41` path is listed under "Premium API Access" but the crawled site does not provide detailed documentation for this particular route. The site's docs, pricing, and API pages all render only a wallet-connect prompt with no further technical content. Based on the URL pattern ("ach" likely refers to ACH — Automated Clearing House banking transfers), this endpoint may relate to financial or payment processing functionality, but this is speculative given the lack of documentation.
The x402 challenge is live and well-formed: it advertises USDC (contract `0x8335...2913` on Base) with a maxAmountRequired of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The endpoint accepts POST requests and returns `application/json`. Without request/response schema documentation, callers will need to experiment or contact the provider to understand the expected input and output formats.
Capabilities
Use cases
- —Programmatic ACH-related queries or operations paid per call in USDC
- —Agent-driven financial workflows that need keyless, on-demand API access
- —Integrating pay-as-you-go financial endpoints into Web3 applications
Fit
Best for
- —Developers wanting zero-setup, pay-per-request financial APIs
- —AI agents that can settle x402 payments on Base in USDC
- —Projects needing ACH-related functionality without subscription commitments
Not for
- —Users who need detailed API documentation before integrating
- —High-volume use cases where per-request pricing may add up versus flat-rate plans
- —Anyone without a USDC wallet on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/41 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific endpoint — no request schema, no response schema, no description of what 'ach/41' actually does. The docs, pricing, and API pages all render only a wallet-connect prompt with no useful content.
Warnings
- —No documentation available for /api/v1/ach/41 — the purpose and expected input/output are unknown
- —All doc pages (docs, pricing, API, README) render only a wallet-connect prompt with no technical content
- —The endpoint name 'ach/41' suggests ACH banking functionality but this is unconfirmed
- —No OpenAPI spec or schema is published
Citations
- —The x402 challenge returns maxAmountRequired of 20000 base units in USDC on Base networkhttps://lowpaymentfee.com/api/v1/ach/41
- —USDC contract address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/ach/41
- —All APIs priced at $0.02/request with no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —Platform offers APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com