Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC
What it does
This endpoint at `/api/v1/ach/78` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint is listed under "Premium API Access" but its exact functionality is unclear — the path suggests ACH (Automated Clearing House) banking-related operations, though no documentation describes the input/output schema or what data it returns.
The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and instant access. The x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0x8335…on Base), which equals $0.02. Payment is made via the x402 exact scheme to the specified payTo address. The platform also offers endpoints for analytics, AI/ML inference (sentiment, summarization, classification, embeddings), finance/crypto data, and utility services, all at the same price point.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response examples, and no description of what the `/api/v1/ach/78` endpoint actually does or what parameters it accepts. Users should treat this as an exploratory endpoint until more documentation surfaces.
Capabilities
Use cases
- —Accessing ACH-related data or operations on a per-call basis without subscription
- —Agent-driven financial workflows that need pay-as-you-go ACH endpoints
- —Exploring x402 protocol payment flows on Base with USDC
Fit
Best for
- —Developers experimenting with x402 pay-per-call protocols
- —Agents needing keyless, on-demand API access settled in USDC
- —Low-volume or sporadic ACH-related API usage without commitments
Not for
- —Production ACH payment initiation (no documentation confirms this capability)
- —High-volume batch processing where subscription pricing would be cheaper
- —Users who need detailed API documentation and guaranteed SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/78 \
-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 it does, what inputs it accepts, or what it returns. The path hints at ACH functionality but nothing confirms this. Docs pages are empty beyond a wallet connect prompt. Effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet'
- —No OpenAPI spec or request/response schema provided
- —The exact purpose of /api/v1/ach/78 is unknown; 'Premium API Access' is a generic label
- —No examples of expected input or output
- —Cannot confirm what ACH operations (if any) this endpoint performs
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/78
- —Platform advertises $0.02/request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/ach/78
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs