Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC
What it does
This endpoint at `/api/v1/ach/190` 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 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no commitments required.
The specific endpoint `/api/v1/ach/190` is listed under the generic title "Premium API Access." Its exact functionality is unclear from the available documentation — the path suggests it may relate to ACH (Automated Clearing House) payment processing or financial data, but no detailed schema, request/response examples, or feature documentation is provided. The x402 challenge confirms the endpoint is live, accepting POST requests, and charges a maximum of 20,000 base units of USDC (0.02 USD per request) on the Base network.
The broader platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities. Documentation pages (`/docs`, `/pricing`, `/README`) all resolve but contain only a "Connect wallet" prompt with no substantive content, making it impossible to verify what this specific endpoint returns or what input it expects.
Capabilities
Use cases
- —Accessing ACH-related financial data or processing via a single pay-per-call request
- —Integrating low-cost API calls into agent workflows without managing API keys
- —Making on-demand financial queries settled in USDC on Base
Fit
Best for
- —Developers wanting keyless, pay-per-use API access
- —Agent-based workflows that can settle payments via x402/USDC on Base
- —Low-volume or sporadic API consumers who prefer no subscriptions
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integration
- —High-volume consumers who would benefit from bulk pricing or rate-limited tiers
- —Anyone unable to pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/190 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and no explanation of what /api/v1/ach/190 actually does. The docs, pricing, and README pages are all empty stubs showing only 'Connect wallet'. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, and /README pages contain no content beyond 'Connect wallet'
- —The exact functionality of /api/v1/ach/190 is unknown; the path hints at ACH but nothing confirms this
- —No request or response schema is provided; callers cannot know what input to send or what output to expect
- —The endpoint path does not appear in the site's own listed API catalog, raising questions about its purpose
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/190
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —Documentation pages (/docs, /pricing, /README) resolve but contain only 'Connect wallet'https://lowpaymentfee.com/docs