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/103` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via x402 on the Base network using USDC. The platform advertises categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure utilities, all at a flat $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 endpoint `/api/v1/ach/103` is listed as "Premium API Access" but its exact functionality is not documented beyond that label. The x402 challenge confirms it is live, accepts POST requests, and requires up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 given USDC's 6 decimals. Payment is sent to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second timeout.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no description of what data or service the `/ach/103` endpoint actually returns. The "ACH" path segment suggests it may relate to ACH (Automated Clearing House) payment processing or data, but this is speculative. Prospective users should test the endpoint directly or contact the provider for details.
Capabilities
Use cases
- —Accessing ACH-related data or services on a per-call basis without subscriptions
- —Integrating pay-per-request APIs into agent workflows via x402 protocol
- —Testing x402 payment flows with a low-cost endpoint
Fit
Best for
- —Developers exploring x402 pay-per-call patterns on Base
- —Agents needing subscription-free API access settled in USDC
- —Low-volume or sporadic API consumers who want no commitments
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or rate-limited tiers
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/103 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the actual functionality of /api/v1/ach/103 is unknown. This is effectively a stub listing.
Warnings
- —No documentation available — docs, pricing, and API pages all render only 'Connect wallet' with no content.
- —The actual functionality of /api/v1/ach/103 is completely undocumented; 'Premium API Access' is the only description.
- —No OpenAPI spec or request/response schema is provided.
- —No examples of input or output are available.
Citations
- —The platform offers APIs at $0.02/request with no API keys, no rate limits, and instant access on Base network.https://lowpaymentfee.com
- —The x402 challenge confirms the endpoint is live, accepts POST, and requires up to 20000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).https://lowpaymentfee.com/api/v1/ach/103
- —The platform lists categories including Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure.https://lowpaymentfee.com