x402basequality 0.30

Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/ach/138

What it does

This endpoint at `/api/v1/ach/138` is part of the lowpaymentfee.com platform, which offers a broad catalog of pay-per-request APIs spanning data analytics, AI/ML inference, finance/Web3, and infrastructure utilities. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an x402 payment header to each request.

The specific function of the `/api/v1/ach/138` endpoint is not documented beyond the generic label "Premium API Access." The path segment "ach" may suggest ACH (Automated Clearing House) banking or payment-related functionality, and "138" could be a resource or route identifier, but no schema, request/response examples, or detailed documentation were found. The docs, pricing, API, and README pages on the site all render only a "Connect wallet" prompt with no additional technical content.

The endpoint is confirmed live: it returns a proper x402 challenge (HTTP 402) with an `exact` payment scheme, accepting USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base, payable to `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3`. The method is POST and the response MIME type is `application/json`. Without further documentation, the actual request body format and response structure remain unknown.

Capabilities

x402-paymentusdc-basepay-per-requestno-api-keyjson-responsepost-method

Use cases

  • —Programmatic access to an ACH-related or payment-related service via micropayment
  • —Agent-driven API consumption without pre-registration or API keys
  • —Integrating pay-per-call endpoints into automated workflows on Base

Fit

Best for

  • —Developers wanting zero-signup, pay-as-you-go API access
  • —AI agents that can settle x402 payments in USDC on Base
  • —Prototyping workflows that need instant, keyless API calls

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —High-volume consumers who need bulk pricing or subscription plans
  • —Anyone requiring non-USDC or non-Base payment settlement

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/ach/138 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/ach/138
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is confirmed live with a valid x402 challenge and clear pricing ($0.02 USDC on Base). However, there is no documentation for this specific endpoint — no request/response schema, no description of what 'ach/138' actually does, and the site's docs pages are empty. The listing is essentially a stub with pricing info.

Warnings

  • —The specific functionality of /api/v1/ach/138 is undocumented; 'Premium API Access' is a generic label applied across the platform.
  • —All documentation pages (docs, pricing, API, README) render only 'Connect wallet' with no technical content.
  • —No request body schema or response schema is available — callers must guess or reverse-engineer the API.
  • —The 'ach' path segment suggests possible financial/banking functionality, which may fall under regulated categories.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:48:52Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

JSONhttps://clawmart.sh/api/listings/Yn6E34
Pay-per-call ACH endpoint on Base via x402 — $0.02/request in USDC, no API keys required. — Clawmart · Clawmart