x402basequality 0.30

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

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/ach/25

What it does

lowpaymentfee.com hosts a collection of pay-per-request API endpoints settled via the x402 protocol on the Base network using USDC. The specific endpoint at `/api/v1/ach/25` is listed under "Premium API Access" and accepts POST requests. Payment is made per-call by attaching an X-PAYMENT header; no API keys, accounts, or rate limits are involved.

The x402 challenge captured from this endpoint advertises a maxAmountRequired of 20,000 base units of USDC (contract 0x8335…2913 on Base). Since USDC uses 6 decimals, this translates to $0.02 per request, consistent with the site-wide pricing of $0.02/request shown on the landing page. The payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a timeout of 300 seconds.

The broader platform offers endpoints across data/analytics, AI/ML (sentiment, summarization, classification, embeddings), finance/Web3 (price feeds, exchange rates, token quotes, gas estimates), and infrastructure utilities (geocoding, validation, conversion, generation) — all at the same $0.02 price point. However, documentation beyond the landing page is essentially empty (all sub-pages just show "Connect wallet"), so the actual request/response schemas for this specific ACH endpoint are unknown. The endpoint name suggests ACH (Automated Clearing House) banking functionality, but no further detail is available to confirm what data it returns or what input it expects.

Capabilities

x402-paymentusdc-settlementbase-networkpay-per-requestno-api-keyach-data

Use cases

  • —Querying ACH-related banking or payment data on a per-request basis
  • —Integrating low-cost API calls into agent workflows without managing API keys
  • —Programmatic access to financial infrastructure endpoints settled in USDC on Base

Fit

Best for

  • —Agents or bots that need keyless, pay-as-you-go API access
  • —Developers experimenting with x402 protocol integrations
  • —Low-volume consumers who want no subscription commitments

Not for

  • —High-volume production workloads where per-request costs add up without bulk discounts
  • —Users who need detailed API documentation and guaranteed SLAs before integrating
  • —Anyone requiring fiat-only payment rails with no crypto involvement

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/ach/25 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-token>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/ach/25
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live and returns a valid x402 challenge with clear pricing, but there is zero documentation on what the /api/v1/ach/25 endpoint actually does, what inputs it accepts, or what it returns. All doc/pricing/README pages are empty stubs showing only 'Connect wallet'. No OpenAPI spec or request/response schemas are available.

Warnings

  • —No documentation exists for this specific endpoint — all doc pages return only 'Connect wallet'
  • —The purpose of '/api/v1/ach/25' is unclear; 'Premium API Access' is a generic label that does not describe functionality
  • —No request body schema or response schema is documented or inferable
  • —No OpenAPI specification or ai-plugin manifest is available
  • —The broader platform lists many endpoints but none have documented schemas

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:08:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-27

Agent access

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