x402basequality 0.30

ACH routing number lookup via x402 micropayment on Base network, $0.02 per request.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/ach/121

What it does

This endpoint at `/api/v1/ach/121` is part of the lowpaymentfee.com platform, which offers a suite of pay-per-call APIs settled via x402 micropayments in USDC on the Base network. The specific endpoint appears to serve ACH-related data — likely a routing number lookup or validation given the `/ach/121` path pattern (121 resembles the start of a US bank routing number). The platform advertises uniform $0.02-per-request pricing with no API keys, no rate limits, and instant access.

The x402 challenge confirms the endpoint is live and accepts POST requests. Payment is settled in USDC (contract `0x8335...2913` on Base) with a max amount of 20,000 base units, which equals $0.02 (USDC uses 6 decimals). The payment scheme is "exact" with a 300-second timeout. No OpenAPI schema or detailed documentation was found for this specific endpoint — the docs, pricing, and API pages all returned only a "Connect wallet" prompt with no substantive content.

The broader lowpaymentfee.com platform lists endpoints across data/analytics, AI/ML, finance/Web3, and infrastructure categories, all at the same $0.02 price point. However, the `/api/v1/ach/121` endpoint is not listed on the homepage's API catalog, which raises questions about whether it is a fully supported production endpoint or a less-documented route. Without request/response schema documentation, the exact input parameters and output format remain unknown.

Capabilities

ach-routing-lookupx402-paymentusdc-settlementbase-networkpay-per-callno-api-key

Use cases

  • —Looking up ACH routing number details for payment processing
  • —Validating bank routing numbers before initiating transfers
  • —Enriching financial transaction data with bank information

Fit

Best for

  • —Agents needing on-demand ACH routing data without API key management
  • —Micropayment-based financial data lookups
  • —Crypto-native applications that can settle in USDC on Base

Not for

  • —Bulk batch lookups where per-call pricing is inefficient
  • —Applications requiring detailed API documentation and SLAs
  • —Users who cannot transact in USDC on the Base network

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/ach/121 \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402-payment-header>"

Endpoint

URLhttps://lowpaymentfee.com/api/v1/ach/121
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge confirmed) and pricing is clear ($0.02 USDC on Base), but there is no documentation for this specific endpoint — no request/response schema, no examples, and the endpoint isn't listed in the site's own API catalog. The docs/pricing/API pages all render only a wallet-connect prompt with no useful content.

Warnings

  • —No request or response schema available for this endpoint
  • —Endpoint /api/v1/ach/121 is not listed in the site's public API catalog — may be undocumented or experimental
  • —All documentation pages (docs, pricing, API, README) returned only 'Connect wallet' with no substantive content
  • —Exact functionality is inferred from the URL path; actual behavior is unconfirmed

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 01:52:34Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/vcTdpx
ACH routing number lookup via x402 micropayment on Base network, $0.02 per request. — Clawmart · Clawmart