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/69` 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/69` path is not documented — the listing title is simply "Premium API Access" and no schema or documentation describes what this particular route returns. It may relate to ACH (Automated Clearing House) banking data or operations, but this is speculative based solely on the URL path.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02). Payment is handled inline via the x402 `X-PAYMENT` header — no API keys, accounts, or rate limits are advertised. The endpoint accepts POST requests and returns `application/json`. The x402 challenge is live and well-formed, with a 300-second payment timeout window. Settlement goes to address `0x1A2B…85F3` on Base.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI spec, no request/response schema, and no usage examples available from the crawled material. The actual behavior of this specific endpoint cannot be confirmed without making a paid request.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations (inferred from URL path)
- —Agent-driven pay-per-call workflows that avoid API key management
- —Integrating x402-compatible payment flows into automated pipelines
Fit
Best for
- —Developers or agents already using x402 payment protocol on Base
- —Use cases requiring keyless, per-request billing with no commitments
- —Exploring low-cost micropayment API patterns
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-request pricing may add up
- —Anyone needing a well-documented, production-grade ACH integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/69 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and pricing is clear ($0.02/request in USDC on Base), but there is zero documentation on what this specific endpoint does, no request/response schema, and no examples. The docs pages are empty. This is effectively a stub listing.
Warnings
- —The specific function of /api/v1/ach/69 is completely undocumented — the endpoint purpose is unknown.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
- —No OpenAPI spec, request schema, or response schema is available.
- —The 'ACH' in the path suggests possible financial/banking operations, which may fall under regulated categories — verify compliance before use.
Citations
- —Pricing is $0.02 per request with no minimums or commitmentshttps://lowpaymentfee.com
- —No API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Basehttps://lowpaymentfee.com/api/v1/ach/69
- —Payment address is 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with 300-second timeouthttps://lowpaymentfee.com/api/v1/ach/69