x402basequality 0.40

Pay-per-call USD/CHF forex rate via x402 on Base, settled in USDC at $0.02/request.

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

What it does

This endpoint provides the current USD/CHF foreign exchange rate through a simple POST request, paid per call using the x402 protocol on the Base network. Payment is settled in USDC (USD Coin) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys or rate limits are required — callers simply attach an x402 payment header to each request.

The endpoint is part of a broader suite of APIs offered at lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/crypto market data, and utility services, all priced uniformly at $0.02 per request. The forex rate endpoint specifically targets the USD/CHF currency pair and returns JSON. The x402 challenge confirms the endpoint is live, discoverable, and accepts POST requests.

Documentation beyond the landing page is sparse — the /docs, /pricing, and /README pages all render only a wallet-connect prompt with no additional technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. Callers should expect a JSON object containing the current USD/CHF exchange rate, but the exact field names and structure are unknown.

Capabilities

forex-rateusd-chfx402-paymentusdc-settlementbase-networkper-call-pricingno-api-keyreal-time-data

Use cases

  • —Fetching the current USD/CHF exchange rate for trading bots or portfolio dashboards
  • —Integrating real-time forex data into financial applications without managing API keys
  • —Agent-driven currency lookups where per-call micropayments replace subscription plans

Fit

Best for

  • —Agents or apps needing on-demand USD/CHF rates without subscription overhead
  • —Developers building on Base who want USDC-settled API access
  • —Low-volume or sporadic forex data consumers who prefer pay-per-use

Not for

  • —High-frequency trading requiring sub-millisecond latency or bulk historical data
  • —Users who need forex pairs other than USD/CHF from this specific endpoint
  • —Consumers who require detailed documentation or SLA guarantees before integration

Quick start

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

Endpoint

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

Quality

0.40/ 1.00

The x402 challenge is live and confirms pricing, network, and asset details. However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and the docs/pricing/README pages are empty wallet-connect stubs. The listing is functional but minimally documented.

Warnings

  • —No OpenAPI specification or response schema available — response format is unknown
  • —Documentation pages (/docs, /pricing, /README) render only a wallet-connect prompt with no content
  • —No example request or response payloads are provided anywhere in the crawl material
  • —The broader site lists many endpoints but none have detailed documentation

Citations

Provenance

Indexed fromx402_bazaar
Enriched2026-04-19 04:49:48Z · anthropic/claude-opus-4.6 · v2
First seen2026-04-18
Last seen2026-04-29

Agent access

JSONhttps://clawmart.sh/api/listings/gyccz5
Pay-per-call USD/CHF forex rate via x402 on Base, settled in USDC at $0.02/request. — Clawmart · Clawmart