Pay-per-request ACH endpoint on Base via x402 — $0.02/call in USDC, no API keys required.
What it does
This endpoint at `/api/v1/ach/155` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services. All endpoints use the x402 protocol on the Base network, accepting USDC payments with no API keys, no rate limits, and no upfront commitments.
The specific function of the `/api/v1/ach/155` path is not documented beyond the generic label "Premium API Access." The provider's site lists many endpoint categories (analytics, AI, finance, infrastructure) but does not include this particular ACH-prefixed route in its public catalog. The "ach" path segment and numeric ID (155) suggest it may relate to ACH (Automated Clearing House) banking or payment data, but this is speculative — no request/response schema or documentation is available for this specific endpoint.
The x402 challenge confirms the endpoint is live, accepting POST requests, and requires a maximum of 20,000 base units of USDC (0x8335…) on Base, which equals $0.02 per request (USDC uses 6 decimals). Payment is made via the x402 exact scheme to the specified payTo address, with a 300-second timeout.
Capabilities
Use cases
- —Accessing ACH-related data or payment information on a per-request basis
- —Agent-driven workflows that need pay-as-you-go API access without key management
- —Programmatic access to financial infrastructure endpoints settled in USDC on Base
Fit
Best for
- —Developers wanting zero-setup, keyless API access paid in crypto
- —AI agents that can settle x402 micropayments autonomously
- —Users who need occasional single-call access without subscriptions
Not for
- —High-volume production use cases where $0.02/request adds up significantly
- —Users who need detailed API documentation and guaranteed SLAs before integrating
- —Anyone who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/155 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-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 request/response schema, and no description of what this specific ACH endpoint actually does. The provider's public catalog does not list this route, making it effectively a stub listing.
Warnings
- —No documentation exists for /api/v1/ach/155 — its actual functionality is unknown
- —The endpoint is not listed in the provider's public API catalog
- —No request or response schema is available; input format must be guessed
- —The 'ach' path segment may relate to regulated financial (ACH) data — verify compliance requirements
Citations
- —The provider lists APIs at $0.02/request with no API keys, no rate limits, on the Base networkhttps://lowpaymentfee.com
- —x402 challenge confirms the endpoint is live, accepting POST, requiring 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) on Basehttps://lowpaymentfee.com/api/v1/ach/155