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/30` 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/30` path is not documented on the site — the landing page lists many endpoints but this particular one is not among them. The path suggests it may relate to ACH (Automated Clearing House) payment processing with a parameter of 30 (possibly days or a routing identifier), but this is speculative.
The endpoint is live and returns a valid x402 challenge. It accepts POST requests and charges up to 20,000 base units of USDC (0x8335…on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you simply attach an x402 payment header to each call. The payment timeout is 300 seconds.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no additional content. There is no OpenAPI schema, no request/response examples, and no description of what this endpoint actually returns. Without documentation of the expected POST body or response format, integration requires experimentation.
Capabilities
Use cases
- —Programmatic ACH-related lookups or operations paid per request in USDC
- —Agent-driven financial data retrieval without pre-registration or API keys
- —Integrating low-cost payment-gated endpoints into automated workflows
Fit
Best for
- —Developers wanting zero-signup, pay-as-you-go API access
- —AI agents with x402-compatible wallets on Base
- —Prototyping with micropayment-gated services
Not for
- —Users needing detailed documentation or guaranteed SLAs before integration
- —High-volume production workloads where undocumented endpoints pose risk
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/30 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ach/30 does, what request body it expects, or what it returns. The endpoint is not listed on the provider's own landing page. No OpenAPI schema, no examples, no docs content beyond 'Connect wallet'.
Warnings
- —The /api/v1/ach/30 endpoint is not listed among the provider's advertised APIs — its purpose is unknown
- —All documentation pages (docs, API, pricing, README) render only 'Connect wallet' with no usable content
- —No request or response schema is available; integration requires blind experimentation
- —If this endpoint relates to ACH banking operations, it may fall under financial regulation
Citations
- —The endpoint returns a valid x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/30
- —The platform advertises $0.02/request pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Base networkhttps://lowpaymentfee.com/api/v1/ach/30
- —Documentation pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs