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/136` is part of the lowpaymentfee.com platform, which offers a broad catalog 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/136` path is not documented — the listing title is simply "Premium API Access" and no schema, parameter descriptions, or example responses are provided. The "ach" path segment suggests it may relate to ACH (Automated Clearing House) banking or payment functionality, but this is speculative.
Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), paid via the x402 exact-payment scheme. The platform advertises no API keys, no rate limits, no minimums, and instant access. Payment is made by including an X-PAYMENT header with a valid x402 payment proof. The endpoint accepts HTTP POST requests and returns `application/json`.
Documentation is extremely sparse. The docs, API, pricing, 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. The endpoint is confirmed live (returns a proper 402 challenge), but without knowing what data or service it actually provides, agents should treat this as a low-information listing.
Capabilities
Use cases
- —Programmatic access to an ACH-related service with per-call USDC micropayments
- —Agent-driven API consumption without pre-registration or API keys
- —Integrating x402 payment flows into automated workflows
Fit
Best for
- —Developers experimenting with x402 pay-per-call protocols
- —Agents that need keyless, instant API access settled in USDC on Base
- —Use cases where avoiding subscription commitments is important
Not for
- —Users who need well-documented APIs with clear request/response schemas
- —Production systems requiring guaranteed SLAs or support
- —Anyone needing free or high-volume bulk access
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/136 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-proof>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no OpenAPI spec, no request/response schema, and no description of what the endpoint actually does. The 'ach/136' path is unexplained. Effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —The specific function of /api/v1/ach/136 is unknown; 'Premium API Access' is a generic title
- —No request or response schema provided — callers cannot know what parameters to send or what to expect back
- —The 'ach' path segment may imply regulated financial (ACH banking) functionality — verify compliance requirements
- —This endpoint is not listed among the advertised APIs on the homepage, raising questions about its status
Citations
- —Platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —x402 challenge returns maxAmountRequired of 20000 base units of USDC (USD Coin) on Base networkhttps://lowpaymentfee.com/api/v1/ach/136
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs