Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC
What it does
This endpoint at `/api/v1/ach/49` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-request APIs spanning data & analytics, AI/ML inference, finance & Web3, and infrastructure utilities. All endpoints are gated via the x402 payment protocol, settling in USDC on the Base network. The platform advertises a flat $0.02 per request with no API keys, no rate limits, and instant access.
The specific `/api/v1/ach/49` path falls under a route labeled "Premium API Access," but the crawled site does not list this particular path among its documented endpoints, and no further documentation describes what it returns. The x402 challenge confirms the endpoint is live, accepting POST requests, and requires up to 20,000 base units of USDC (0.02 USDC, i.e., $0.02) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` on Base.
Because the endpoint path includes "ach" — which typically refers to Automated Clearing House bank transfers — it may relate to ACH payment processing or ACH-related data. However, no documentation, schema, or example response is available to confirm this. The broader platform's docs, pricing, and API pages all render only a "Connect wallet" prompt with no additional content. Treat this endpoint with caution until more documentation surfaces.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations via a single micropayment per call
- —Agent-driven financial workflows that need on-demand ACH functionality without API key management
- —Integrating low-cost per-request payment rails into automated pipelines
Fit
Best for
- —Developers who want keyless, pay-per-use API access settled in USDC on Base
- —AI agents with x402-compatible wallets needing ACH-related services
- —Prototyping financial integrations without subscription commitments
Not for
- —Production ACH payment processing requiring regulatory compliance guarantees — no compliance documentation is available
- —Users who need detailed API documentation or response schemas before integrating
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/49 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is no documentation, no request/response schema, and the specific path /api/v1/ach/49 is not listed among the site's documented APIs. The purpose of this endpoint is unclear beyond the generic label 'Premium API Access.'
Warnings
- —The /api/v1/ach/49 path is not listed among the site's documented endpoints — its actual functionality is unknown.
- —All documentation pages (docs, pricing, API, README) render only a 'Connect wallet' prompt with no usable content.
- —If 'ACH' refers to bank transfer processing, regulatory and compliance considerations may apply — no such documentation is provided.
- —No request body schema or response schema is available; integration requires trial-and-error or contacting the provider.
Citations
- —The endpoint returns a 402 x402 challenge requiring up to 20,000 base units of USDC on Base (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).https://lowpaymentfee.com/api/v1/ach/49
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant access on the Base network.https://lowpaymentfee.com
- —The site lists endpoints across Data & Analytics, AI & ML, Finance & Web3, and Infrastructure categories, but /api/v1/ach/49 is not among them.https://lowpaymentfee.com
- —Documentation pages render only a 'Connect wallet' prompt with no additional content.https://lowpaymentfee.com/docs