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/125` 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/125` path is not documented — the listing title is simply "Premium API Access" and the endpoint path suggests it may relate to ACH (Automated Clearing House) payment processing or data, but no schema, input parameters, or response format are provided.
Pricing is $0.02 per request (the x402 challenge advertises a maxAmountRequired of 20,000 base units of USDC, which has 6 decimals, equaling $0.02). The platform advertises no API keys, no rate limits, and instant access. Payment is made via the x402 `exact` scheme, sending USDC to the specified payTo address on Base. The endpoint accepts POST requests.
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 description of what this specific endpoint returns or expects as input. Prospective users should be aware that the actual functionality behind this path is unclear from available materials.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations via a single pay-per-call request
- —Agent-driven workflows that need on-demand API access without pre-registration or API keys
- —Integrating low-cost per-request endpoints into automated pipelines settled on Base
Fit
Best for
- —Developers or agents wanting zero-signup, pay-as-you-go API access
- —Use cases requiring USDC micropayments on Base for each API call
- —Exploratory or low-volume usage where subscription pricing is unnecessary
Not for
- —Users who need detailed documentation or guaranteed SLAs before integrating
- —High-volume production workloads where per-request pricing at $0.02 may not be cost-effective
- —Anyone needing clarity on the exact input/output contract before calling
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/125 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid x402 402 challenge), but there is no documentation, no OpenAPI spec, no request/response schema, and no description of what /api/v1/ach/125 actually does. The listing is effectively a stub with only pricing and protocol details inferable.
Warnings
- —The specific functionality of /api/v1/ach/125 is undocumented — the endpoint path suggests ACH-related operations but this is unconfirmed.
- —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.
- —No examples of successful responses exist in the crawl material.
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/125
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/125
- —Docs, pricing, API, and README pages show only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs