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/115` 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/115` path is not documented — the listing title is simply "Premium API Access" — so the exact data or service it returns is unclear. It may relate to ACH (Automated Clearing House) banking data 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 platform's uniform pricing across all listed APIs. The platform advertises no API keys, no rate limits, no minimums, and instant access. Payment is made via the x402 `exact` scheme to a specified wallet address on Base mainnet.
Documentation is extremely sparse. The docs, pricing, API, 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 specific endpoint accepts or returns beyond `application/json`. Agents should be aware that without knowing the expected POST body or response format, integration requires experimentation or additional out-of-band information.
Capabilities
Use cases
- —Accessing ACH-related data or services on a per-request basis without subscription
- —Agent-driven API consumption with automatic USDC micropayments on Base
- —Integrating pay-as-you-go financial data into automated workflows
Fit
Best for
- —Developers wanting zero-commitment, pay-per-call API access
- —AI agents with x402-compatible payment capabilities on Base
- —Users who prefer crypto micropayments over traditional API key subscriptions
Not for
- —Users needing detailed API documentation or guaranteed SLAs before integration
- —High-volume consumers who would benefit from bulk pricing or rate-limited tiers
- —Anyone requiring non-crypto payment methods
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/115 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live and returns a valid x402 challenge, but there is zero documentation on what /api/v1/ach/115 actually does, what request body it expects, or what it returns. No OpenAPI schema, no examples, and all doc pages are empty. The listing is effectively a stub.
Warnings
- —The specific function of /api/v1/ach/115 is unknown — no documentation exists beyond the generic title 'Premium API Access'.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
- —No request or response schema is available; the expected POST body is entirely undocumented.
- —The 'ach' path segment suggests possible financial/banking data, which may fall under regulated categories — verify compliance before use.
Citations
- —Endpoint returns a valid x402 402 challenge with maxAmountRequired of 20000 in USDC on Basehttps://lowpaymentfee.com/api/v1/ach/115
- —Platform pricing is $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/115
- —Documentation pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs