x402basequality 0.30

Loan amortization schedule API, pay-per-call at $0.02 via USDC on Base.

Price
0.02 USDC / call
Protocol
x402
Verified
no
Endpoint
https://lowpaymentfee.com/api/v1/loans/90/schedule

What it does

This x402-enabled endpoint at lowpaymentfee.com generates a loan amortization schedule for a specific loan (loan ID 90 in the URL path). It is part of a broader platform offering pay-per-request APIs across data analytics, AI/ML, finance, and utility categories, all settled via USDC on the Base network using the x402 payment protocol.

The endpoint accepts POST requests and returns JSON. The x402 challenge advertises a maximum cost of 20,000 base units of USDC (0x8335… on Base), which equals $0.02 per request (USDC uses 6 decimals). The platform emphasizes simplicity: no API keys, no rate limits, no subscriptions — just attach an X-PAYMENT header with a valid x402 payment proof and receive the response. Payment is sent to address 0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3 with a 300-second timeout.

Documentation is extremely sparse. The landing page lists many endpoints but provides no request/response schemas, parameter descriptions, or example payloads. The /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional content. Because of this, the exact POST body format (e.g., loan principal, interest rate, term) and the structure of the returned amortization schedule are unknown and must be discovered by experimentation.

Capabilities

loan-amortization-schedulex402-paymentusdc-base-networkpay-per-requestjson-api

Use cases

  • —Generate an amortization schedule for a loan showing principal and interest breakdown per period
  • —Integrate loan schedule computation into fintech applications without managing API keys
  • —Programmatically retrieve payment schedules for financial planning tools

Fit

Best for

  • —Agents or apps needing on-demand loan amortization calculations
  • —Developers wanting key-free, pay-per-call financial APIs
  • —Crypto-native applications that can settle micropayments in USDC on Base

Not for

  • —Users who need detailed API documentation or guaranteed SLAs before integrating
  • —Applications requiring bulk/batch loan calculations at high volume with predictable flat-rate pricing

Quick start

curl -X POST https://lowpaymentfee.com/api/v1/loans/90/schedule \
  -H "Content-Type: application/json" \
  -H "X-PAYMENT: <x402_payment_proof>" \
  -d '{}'

Endpoint

URLhttps://lowpaymentfee.com/api/v1/loans/90/schedule
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.30/ 1.00

The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base), but there is zero documentation on request parameters, response schema, or what loan ID 90 represents. No OpenAPI spec, no examples, and all doc pages are empty. This is effectively a stub listing.

Warnings

  • —No request or response schema available — POST body format is completely unknown
  • —All documentation pages (/docs, /pricing, /api, /README) return only a 'Connect wallet' prompt with no content
  • —The URL hardcodes loan ID 90; it is unclear whether this is parameterizable or what it represents
  • —No OpenAPI specification or ai-plugin manifest found

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 05:35:20Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/99JDUw
Loan amortization schedule API, pay-per-call at $0.02 via USDC on Base. — Clawmart · Clawmart