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/34` is part of the lowpaymentfee.com platform, which offers a broad suite of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3 data, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request. No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.
The specific endpoint `/api/v1/ach/34` is listed under the title "Premium API Access" but its exact functionality is not documented beyond that label. The provider's landing page groups endpoints into categories (Data & Analytics, AI & Machine Learning, Finance & Web3, Infrastructure), but this particular path (`/ach/34`) does not appear in any of those listed categories. It accepts HTTP POST requests and returns `application/json`. The x402 challenge confirms the endpoint is live, requiring a maximum of 20,000 base units of USDC (6 decimals), which equals $0.02.
Documentation on the site is extremely sparse — the docs, API, pricing, 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 description of what the `/ach/34` endpoint actually does or what parameters it accepts. Prospective users should be aware that the actual behavior of this endpoint is unclear without further experimentation.
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 wanting zero-setup, keyless API access via crypto micropayments
- —AI agents that can settle x402 payments autonomously on Base
- —Users who prefer pay-per-request pricing with no subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —Anyone requiring fiat-only payment rails with no crypto involvement
- —High-volume consumers who need bulk pricing or rate-limit guarantees
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/34 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no documentation, no OpenAPI schema, no request/response examples, and the purpose of `/api/v1/ach/34` is entirely undocumented — it doesn't even appear in the provider's own listed API catalog. This is effectively a stub listing.
Warnings
- —The endpoint path /api/v1/ach/34 does not appear in the provider's own listed API catalog — its actual functionality is unknown.
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content.
- —No OpenAPI spec, request schema, or response schema is available.
- —The label 'Premium API Access' is generic and does not describe what the endpoint does.
Citations
- —The endpoint returns a 402 x402 challenge requiring 20,000 base units of USDC on Base ($0.02)https://lowpaymentfee.com/api/v1/ach/34
- —The platform charges $0.02 per request with no API keys, no rate limits, and instant access on the Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/34
- —Docs, API, pricing, and README pages show only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs