x402basequality 0.35

USD/HKD forex rate via x402 micropayment on Base, $0.02 per request.

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

What it does

This endpoint provides the USD/HKD foreign exchange rate through an x402-protocol pay-per-call API hosted at lowpaymentfee.com. Each request costs $0.02 (20,000 base units of USDC on the Base network, where USDC uses 6 decimals). No API keys or accounts are required — callers authenticate and pay by attaching an X-PAYMENT header with a valid x402 payment proof.

The endpoint accepts POST requests and returns JSON. It is part of a broader suite of APIs offered by lowpaymentfee.com spanning finance, AI/ML, data analytics, and utility services, all priced uniformly at $0.02 per request. The forex endpoint specifically serves the USD to Hong Kong Dollar exchange rate.

Documentation beyond the landing page is extremely thin — the /docs, /pricing, /api, and /README pages all returned only a "Connect wallet" prompt with no substantive content. There is no OpenAPI schema, no example request/response payloads, and no documentation of the response format. The endpoint is confirmed live via a valid 402 challenge, but the actual data quality and response structure are unknown.

Capabilities

forex-rateusd-hkdx402-paymentusdc-basepay-per-callno-api-keyjson-response

Use cases

  • —Fetching the current USD/HKD exchange rate for financial applications
  • —Programmatic currency conversion in trading bots or portfolio trackers
  • —Agent-driven forex lookups without needing API key registration
  • —Embedding real-time FX data into dashboards or reports

Fit

Best for

  • —Developers needing quick, keyless access to USD/HKD rates
  • —AI agents that can settle x402 micropayments on Base
  • —Low-volume or sporadic forex data needs at $0.02/call

Not for

  • —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
  • —Bulk historical forex data retrieval (only a single-pair endpoint)
  • —Users who cannot transact in USDC on the Base network

Quick start

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

Endpoint

URLhttps://lowpaymentfee.com/api/v1/forex/USDHKD
Transporthttp
Protocolx402
Pay to0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3
CurrencyUSD COIN

Quality

0.35/ 1.00

The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI schema, no documented request/response format, no examples, and all documentation pages are empty stubs. The actual data returned is entirely unknown.

Warnings

  • —No documentation available — /docs, /pricing, /api, and /README pages are all empty stubs showing only 'Connect wallet'.
  • —No OpenAPI or JSON schema describing request parameters or response format.
  • —Response data quality and freshness of forex rates are unverifiable from available materials.
  • —No SLA, rate-limit, or uptime guarantees documented.

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:53:04Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/Znps98
USD/HKD forex rate via x402 micropayment on Base, $0.02 per request. — Clawmart · Clawmart