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/151` 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 payment protocol, settling in USDC on the Base network. The specific function of the `/api/v1/ach/151` endpoint is not documented — the path suggests ACH (Automated Clearing House) banking or payment-related functionality, but no schema, parameter documentation, or example responses are available to confirm this.
The endpoint is live and returns a valid x402 challenge. It accepts POST requests and charges a maximum of 20,000 base units of USDC (0.02 USD) per call. Payment is made to `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on the Base network. The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each request.
Documentation is extremely sparse. The landing page lists available API categories and uniform $0.02 pricing, but the `/docs`, `/api`, `/pricing`, and `/README` 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 this specific ACH endpoint accepts or returns. Prospective users should be aware that the actual functionality behind this endpoint is unverified.
Capabilities
Use cases
- —Programmatic ACH-related lookups or operations paid per call in USDC
- —Agent-driven financial workflows that need keyless, pay-as-you-go API access
- —Integrating low-cost payment or banking data into automated pipelines
Fit
Best for
- —Developers wanting keyless, pay-per-use API access settled on Base
- —AI agents that can attach x402 payment headers autonomously
- —Low-volume or experimental use cases where $0.02/call is acceptable
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume production workloads requiring bulk pricing or rate-limit guarantees
- —Anyone needing non-crypto payment options
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/151 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ach/151 actually does — no input schema, no output schema, no examples, and no description beyond the generic title 'Premium API Access'. The docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation exists for this specific endpoint — its actual functionality is unknown
- —All doc/pricing/README pages render only 'Connect wallet' with no content
- —No OpenAPI spec or request/response schema available
- —The 'ACH' path segment suggests financial/banking functionality but this is unconfirmed
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/151
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/151