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/108` is part of the lowpaymentfee.com platform, which offers a collection 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. The specific function of the `/api/v1/ach/108` path is not documented — the provider labels it generically as "Premium API Access" — so its exact capabilities are unclear. It may relate to ACH (Automated Clearing House) payment processing or data lookup given the URL path segment, but this is speculative.
The endpoint is live and returns a valid x402 challenge. Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the platform's uniform pricing across all listed APIs. Payment is made via the x402 `exact` scheme to a specified wallet address on Base. No API keys, rate limits, or upfront commitments are advertised. The POST method is the expected HTTP method based on the probe's outputSchema.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. Without knowing what request body to send or what response to expect, integration requires experimentation or direct contact with the provider.
Capabilities
Use cases
- —Programmatic ACH-related data retrieval or payment initiation (speculative based on URL path)
- —Agent-driven pay-per-call API access without pre-registration or API keys
- —Integrating USDC micropayments for on-demand API consumption on Base
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents with x402-compatible payment capabilities on Base
- —Users who prefer crypto-native micropayment settlement over subscriptions
Not for
- —Anyone needing well-documented APIs with clear request/response schemas
- —Production use cases requiring SLAs, rate limit guarantees, or support
- —Users who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/108 \
-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 essentially no documentation: no OpenAPI spec, no request/response schema, no examples, and the specific function of /api/v1/ach/108 is undocumented. The docs pages are empty beyond a wallet-connect prompt. This is effectively a stub listing.
Warnings
- —The exact purpose and functionality of /api/v1/ach/108 is undocumented — 'Premium API Access' is a generic label applied across the platform.
- —No request body schema or response schema is available; integration requires guesswork.
- —All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no substantive content.
- —If this endpoint relates to ACH payment processing, it may fall under financial regulation — verify compliance before use.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 in USDC on Basehttps://lowpaymentfee.com/api/v1/ach/108
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/108
- —The platform offers APIs across data & analytics, AI/ML, finance/Web3, and infrastructure categorieshttps://lowpaymentfee.com