x402-gated premium API access on Base, pay $0.02 per request in USDC — no API keys required.
What it does
This endpoint at lowpaymentfee.com provides "Premium API Access" via the x402 payment protocol on the Base network. The specific path `/api/v1/ach/196` is part of a broader platform that offers dozens of pay-per-call API endpoints spanning data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced at $0.02 per request in USDC.
The endpoint accepts HTTP POST requests and returns JSON. Payment is handled inline via the x402 protocol: callers attach an `X-PAYMENT` header containing a signed USDC payment on Base (asset contract `0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`). The maximum amount required is 20,000 base units of USDC (6 decimals), which equals $0.02. There are no API keys, no rate limits, and no subscription commitments — each call is independently settled on-chain.
However, the specific functionality behind `/api/v1/ach/196` is not documented. The path suggests it may relate to ACH (Automated Clearing House) banking data or operations, but this is speculative. The platform's landing page lists many endpoints but does not include this particular one, and the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further content. Without documentation or an example response schema, the actual capability of this endpoint remains unclear.
Capabilities
Use cases
- —Programmatic access to ACH-related data or operations via a single micropayment per call
- —Agent-driven workflows that need keyless, on-demand API access settled in USDC on Base
- —Integrating pay-as-you-go API calls into Web3 applications without subscription overhead
Fit
Best for
- —Developers wanting frictionless, keyless API access with crypto micropayments
- —AI agents that can autonomously pay for API calls via x402
- —Users who prefer per-request billing over monthly subscriptions
Not for
- —Users who need detailed API documentation or guaranteed SLAs before integrating
- —High-volume consumers who would benefit from bulk pricing or rate-limited plans
- —Anyone who cannot transact in USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/ach/196 \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <signed-x402-payment-header>" \
-d '{}'Endpoint
Quality
The endpoint is live (returns a valid 402 x402 challenge) and pricing is clear ($0.02 USDC on Base), but there is no documentation, no request/response schema, and the specific functionality of /api/v1/ach/196 is unknown. The docs, pricing, and API pages are all empty beyond a wallet-connect prompt.
Warnings
- —The specific functionality of /api/v1/ach/196 is undocumented — the 'ach' path segment suggests ACH banking operations but this is unconfirmed.
- —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no usable content.
- —This endpoint is not listed among the advertised APIs on the landing page.
- —No request or response schema is available; callers cannot know what to send or expect back.
- —If 'ACH' refers to Automated Clearing House banking operations, this may fall under financial services regulation.
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/ach/196
- —The platform advertises $0.02 per request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/ach/196
- —Docs, pricing, API, and README pages render only 'Connect wallet' with no further contenthttps://lowpaymentfee.com/docs