Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC
What it does
This endpoint at `/api/v1/ach/65` 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) banking-related data or operations, though no documentation describes the input/output schema. The platform advertises a uniform $0.02 per request pricing model across all its endpoints.
The x402 challenge confirms the endpoint is live, accepting POST requests and requiring payment of up to 20,000 base units of USDC (0x8335…2913 on Base, 6 decimals = $0.02) per call. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3. No API keys or rate limits are advertised; access is gated purely by micropayment. The platform claims instant access with no minimums or commitments.
Documentation is extremely sparse. The docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no substantive content. There is no OpenAPI spec, no request/response schema, and no examples for this or any other endpoint on the platform. The site lists many endpoint categories (data/analytics, AI/ML, finance/web3, infrastructure) but provides no detail on what any individual endpoint actually returns. Without documentation or example responses, it is impossible to verify what `/api/v1/ach/65` does or what payload it expects.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations via micropayment
- —Agent-driven financial workflows requiring per-call payment without API key management
- —Integrating low-cost banking utility endpoints into automated pipelines
Fit
Best for
- —Developers wanting keyless, pay-per-use API access on Base
- —AI agents that can settle x402 micropayments in USDC
- —Prototyping workflows that need ACH-related functionality without subscription commitments
Not for
- —Production use cases requiring documented request/response contracts
- —Users who need detailed API documentation or SDKs before integrating
- —High-volume use cases where $0.02/request adds up without volume discounts
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/65 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>" \
-d '{}'Endpoint
Quality
The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is zero documentation on what this endpoint does, what inputs it expects, or what it returns. The path '/api/v1/ach/65' is opaque, and the site's docs pages are empty. This is effectively a stub listing.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI spec or request/response schema provided for any endpoint on the platform
- —The specific function of /api/v1/ach/65 is unknown; 'Premium API Access' is a generic label
- —The '65' path parameter is unexplained
- —Cannot verify what data or service this endpoint actually provides
Citations
- —The endpoint returns a 402 x402 challenge requiring up to 20,000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/65
- —Platform advertises $0.02/request uniform pricing with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/65
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no substantive contenthttps://lowpaymentfee.com/docs