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/61` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs settled via the x402 protocol on the Base network using USDC. The specific endpoint is listed under "Premium API Access" but its exact functionality is unclear — the path suggests ACH (Automated Clearing House) payment-related data or operations, though no documentation describes the input/output schema for this particular route.
The platform advertises a flat $0.02 per request across all endpoints, with no API keys, no rate limits, and no minimum commitments. The x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0.02 USDC = $0.02) on the Base network to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. Payment timeout is 300 seconds.
The broader platform lists endpoints across data/analytics, AI/ML (sentiment analysis, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation). However, documentation pages (`/docs`, `/pricing`, `/README`) all returned only a "Connect wallet" prompt with no substantive content, so the actual behavior, request format, and response schema for this specific ACH endpoint remain undocumented.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations with per-call USDC micropayments
- —Agent-driven financial workflows that need keyless, pay-as-you-go API access
- —Integrating ACH functionality into Web3 applications without traditional API key management
Fit
Best for
- —Developers wanting zero-signup, pay-per-use API access on Base
- —AI agents that can settle x402 payments autonomously
- —Projects needing low-cost ACH-related API calls without rate limits
Not for
- —Users who need detailed API documentation before integrating
- —High-volume production workloads where per-call pricing may add up
- —Anyone requiring traditional fiat payment methods (credit card, invoice)
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/61 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC per call), but there is no documentation for the /api/v1/ach/61 route — no input schema, no output schema, no description of what it actually does. All doc pages returned only 'Connect wallet' with no content. The listing is effectively a stub.
Warnings
- —No documentation available — /docs, /pricing, and /README pages all return only 'Connect wallet' with no content
- —The exact functionality of /api/v1/ach/61 is unknown; 'Premium API Access' is a generic label
- —No request or response schema is documented or inferrable
- —The platform lists many endpoint categories but none match the /ach/ path pattern, raising questions about what this endpoint does
Citations
- —The endpoint returns a 402 challenge requiring up to 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/ach/61
- —Platform advertises $0.02/request flat pricing with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/61
- —Documentation pages (/docs, /pricing, /README) returned only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs