Pay-per-call ACH endpoint on Base network via x402, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides a "Premium API Access" resource at the path /api/v1/ach/165. It is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities—all priced at $0.02 per request and settled via x402 on the Base network using USDC.
The specific function of the /api/v1/ach/165 endpoint is not documented beyond its generic "Premium API Access" label. The platform advertises no API keys, no rate limits, and instant access. Payment is handled inline via the x402 protocol: callers send an X-PAYMENT header with a signed USDC payment on Base, and the endpoint returns its response (application/json) upon verification. The max amount required per call is 20,000 base units of USDC (6 decimals), which equals $0.02.
Documentation is extremely sparse—the docs, pricing, and README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what data or functionality the /ach/165 path actually provides. The endpoint is live (returns a valid 402 challenge), but without more context it is difficult to determine its precise use case.
Capabilities
Use cases
- —Programmatic access to an ACH-related resource with per-call USDC micropayments
- —Agent-driven API consumption without pre-registration or API keys
- —Integrating pay-as-you-go endpoints into automated workflows on Base
Fit
Best for
- —Developers wanting keyless, pay-per-call API access
- —AI agents that can settle x402 payments on Base
- —Users who prefer no subscriptions or rate-limit constraints
Not for
- —Users needing detailed documentation or guaranteed SLAs
- —Applications requiring free or high-volume bulk access without per-call cost
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/165 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of /api/v1/ach/165 is entirely unclear beyond the generic 'Premium API Access' label.
Warnings
- —No documentation available—docs/pricing/README pages only show 'Connect wallet'
- —The specific functionality of /api/v1/ach/165 is undocumented and unclear
- —No OpenAPI schema or example payloads provided
- —Cannot verify what data or service is actually returned after payment
Citations
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, instant access, on Base networkhttps://lowpaymentfee.com
- —x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/ach/165