Real-time QNT token price data via x402 micropayment on Base for $0.02/request.
What it does
This endpoint returns the current price of the QNT (Quant) token. It is part of a broader suite of pay-per-call APIs hosted at lowpaymentfee.com, covering data analytics, AI/ML inference, finance/Web3 data, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network at $0.02 per request.
The specific endpoint `/api/v1/tokens/QNT/price` accepts POST requests and returns JSON. Payment is handled via the X-PAYMENT header using the x402 "exact" scheme — no API keys, accounts, or rate limits are required. The x402 challenge confirms the endpoint is live, requesting a maximum of 20,000 base units of USDC (0.02 USD, since USDC uses 6 decimals) per call, paid to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` with a 300-second payment timeout.
Documentation beyond the landing page is extremely sparse — the /docs, /api, /pricing, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response schema. The endpoint appears to be one of many token price endpoints following a `/api/v1/tokens/{symbol}/price` pattern, though only QNT is confirmed in this probe.
Capabilities
Use cases
- —Fetching the current market price of QNT (Quant) token programmatically
- —Building trading bots or dashboards that need on-demand token pricing without API key management
- —Agent-driven workflows that need pay-per-call crypto price data with no subscription
Fit
Best for
- —Agents or apps needing occasional, on-demand QNT price lookups
- —Developers who want zero-signup, pay-as-you-go crypto price data
- —x402-compatible clients settling micropayments in USDC on Base
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users who need historical price data or OHLCV candles (only current price implied)
- —Anyone without an x402-compatible payment client or USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/QNT/price \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The x402 challenge is live and confirms pricing and payment details, but there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages are empty beyond a wallet-connect prompt. The endpoint's actual behavior and response format must be entirely inferred.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All doc pages (/docs, /api, /pricing, /README) render only 'Connect wallet' with no content
- —No example responses or error codes documented
- —The broader site lists many endpoints but none have detailed documentation; quality of data sources is unverifiable
Citations
- —Endpoint returns HTTP 402 with x402 challenge requesting 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/tokens/QNT/price
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/QNT/price
- —All endpoints priced at $0.02 per request with no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —Site lists Finance & Web3 category endpoints including price feeds, exchange rates, token quotes, and gas estimateshttps://lowpaymentfee.com