Get the current price of API3 token via a pay-per-call x402 endpoint on Base.
What it does
This endpoint returns the current price of the API3 token. It is part of a broader suite of pay-per-request APIs hosted at lowpaymentfee.com, which spans data analytics, AI/ML inference, finance/Web3 market data, and utility services. All endpoints use the x402 payment protocol, settling in USDC on the Base network.
The specific endpoint at `/api/v1/tokens/API3/price` accepts POST requests and returns JSON. The cost per request is $0.02 (20,000 base units of USDC with 6 decimals). No API keys are required; payment is handled inline via the x402 `X-PAYMENT` header. The provider advertises no rate limits and instant access.
The endpoint was confirmed live, returning a proper 402 challenge with x402 version 1. Documentation on the site is minimal — the docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI spec, no request/response schema beyond the x402 `outputSchema` stub, and no example responses available. The token price data source and update frequency are unknown.
Capabilities
Use cases
- —Fetching the current API3 token price for portfolio tracking or trading bots
- —Integrating real-time API3 pricing into a DeFi dashboard
- —Agent-driven price checks without managing API keys or subscriptions
Fit
Best for
- —Agents or bots that need on-demand API3 token pricing without subscription overhead
- —Developers who prefer crypto-native pay-per-call billing on Base
- —Low-volume or sporadic price lookups where $0.02/request is acceptable
Not for
- —High-frequency trading requiring sub-second latency and bulk pricing (no documented SLA or latency guarantees)
- —Users needing historical price data or OHLCV candles (only current price is indicated)
- —Anyone requiring detailed API documentation or guaranteed uptime SLAs
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/API3/price \
-H "X-PAYMENT: <x402_payment_token>" \
-H "Content-Type: application/json"Endpoint
Quality
The endpoint is confirmed live with a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no request/response schema, no example payloads, and the documentation pages are empty beyond a wallet-connect prompt. The actual data source and response format are unknown.
Warnings
- —No OpenAPI or detailed API documentation available — docs pages render only 'Connect wallet'
- —No example request or response bodies documented; response schema is unknown
- —Data source and update frequency for API3 token price are not disclosed
- —The endpoint path suggests token-specific pricing but no list of supported tokens is documented
Citations
- —The endpoint returns a 402 challenge with x402 version 1, accepting USDC on Base network with maxAmountRequired of 20000 base unitshttps://lowpaymentfee.com/api/v1/tokens/API3/price
- —All APIs on the platform cost $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —The USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/API3/price