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/70` 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/70` path is not documented — the provider labels it generically as "Premium API Access" — so its exact capability is unclear. It may relate to ACH (Automated Clearing House) payment processing or lookup given the URL path, but this is speculative.
The endpoint is live and returns a valid x402 challenge. Pricing is $0.02 per request (20,000 base units of USDC with 6 decimals = $0.02), consistent with the site-wide flat rate advertised across all their APIs. Payment is made via the x402 `exact` scheme to a specified wallet address on Base. No API keys, rate limits, or subscriptions are required — callers simply attach an `X-PAYMENT` header with a valid x402 payment proof.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no request/response schema, and no usage examples available. The endpoint accepts POST requests and returns `application/json`, but the expected input body and output structure are unknown.
Capabilities
Use cases
- —Programmatic access to an ACH-related service with per-call USDC micropayments
- —Agent-driven API consumption without pre-registration or API key management
- —Integrating pay-as-you-go endpoints into automated workflows on Base
Fit
Best for
- —Developers experimenting with x402 pay-per-call protocols
- —Agents that need keyless, on-demand API access settled in USDC
- —Use cases requiring low-cost per-request pricing without subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume batch processing where per-call fees add up quickly
- —Anyone needing a well-documented, production-grade ACH integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/70 \
-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 zero documentation on what /api/v1/ach/70 actually does. No OpenAPI spec, no request/response schemas, no examples. The docs pages are empty. The endpoint's purpose can only be guessed from the URL path.
Warnings
- —The specific function of /api/v1/ach/70 is undocumented — the 'ACH' path segment suggests payment-related functionality but this is unconfirmed.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
- —No request body schema or response schema is available; callers have no way to know what input is expected.
- —No OpenAPI or machine-readable specification is published.
Citations
- —The endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 in USDC on Basehttps://lowpaymentfee.com/api/v1/ach/70
- —Site-wide pricing is $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/70
- —Documentation pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs