Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC
What it does
This endpoint at `/api/v1/ach/180` is part of the lowpaymentfee.com platform, which offers a collection 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 with no API keys, no rate limits, and instant access.
The specific `/api/v1/ach/180` endpoint is listed under the title "Premium API Access" but its exact functionality is not documented in the available crawl material. The path suggests it may relate to ACH (Automated Clearing House) payment processing or lookup, but this is speculative — the provider's landing page does not list this particular route among its advertised APIs. The x402 challenge confirms the endpoint is live, accepts POST requests, and requires payment of up to 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 given USDC's 6 decimals.
Documentation is extremely thin: the /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no usage examples available. Prospective users should be aware that without documentation it is unclear what request body this endpoint expects or what response it returns.
Capabilities
Use cases
- —Programmatic ACH-related data retrieval or processing via a single paid API call
- —Agent-driven payment workflows that settle per-request in USDC on Base
- —Integrating low-cost financial utility endpoints without managing API keys
Fit
Best for
- —Developers wanting keyless, pay-per-call financial APIs
- —AI agents with x402-compatible wallets on Base
- —Prototyping payment-adjacent workflows without subscription commitments
Not for
- —Production use requiring documented request/response schemas
- —High-volume batch ACH processing with SLA guarantees
- —Users who need fiat-only payment rails (this requires USDC on Base)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/180 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no OpenAPI spec, no request/response schema, and the specific purpose of /api/v1/ach/180 is undocumented. This is effectively a stub listing.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all return only a wallet-connect prompt
- —The /api/v1/ach/180 route is not listed among the provider's advertised APIs on the landing page
- —No request or response schema is available; the endpoint's exact functionality is unknown
- —The endpoint name suggests ACH/payment functionality which may be subject to financial regulations
Citations
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —The x402 challenge shows maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/ach/180
- —The platform advertises APIs across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categorieshttps://lowpaymentfee.com