Get the current price of ZRX (0x Protocol) token via a pay-per-call x402 endpoint on Base.
What it does
This endpoint returns the current price of the ZRX (0x Protocol) token. It is part of a broader suite of APIs hosted at lowpaymentfee.com that cover data analytics, AI/ML inference, finance, crypto, and utility services — all accessible via the x402 payment protocol on the Base network.
The endpoint accepts POST requests and is gated by an x402 payment challenge. Each call costs $0.02 in USDC (USD Coin) on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). There are no API keys, no rate limits, and no subscriptions — you pay per request with an on-chain micropayment. The x402 challenge specifies a maximum amount of 20,000 base units of USDC (6 decimals), which equals $0.02.
Documentation beyond the landing page is sparse: the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no additional technical detail. There is no OpenAPI schema, no example request/response payloads, and no description of the response format. The endpoint is confirmed live (returns a proper 402 challenge), but the actual response schema for a paid request is unknown.
Capabilities
Use cases
- —Fetching the current ZRX token price for portfolio tracking or trading bots
- —Integrating real-time ZRX pricing into a DeFi dashboard
- —Agent-driven price lookups without API key management
- —On-demand crypto price checks with per-call micropayments
Fit
Best for
- —AI agents or bots that need on-demand ZRX price data without managing API keys
- —Developers wanting frictionless pay-per-call crypto price access on Base
- —Low-volume or sporadic price lookups where subscriptions are overkill
Not for
- —High-frequency trading requiring sub-second latency and bulk pricing (per-call payment overhead may be prohibitive)
- —Users who need historical price data or OHLCV candles (no evidence this endpoint provides that)
- —Anyone without a Base-compatible wallet or USDC balance
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/ZRX/price \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live with 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 example payloads, and all documentation pages return only a wallet-connect prompt. The listing is effectively a stub with confirmed liveness.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All doc pages (/docs, /pricing, /api, /README) render only a 'Connect wallet' prompt with no technical content
- —No example request or response payloads are available to verify what the endpoint actually returns
- —The broader lowpaymentfee.com platform lists many endpoints across diverse categories (AI, analytics, finance, utilities) all at $0.02 — the depth and quality of each is unverified
Citations
- —The endpoint returns a 402 x402 challenge with maxAmountRequired of 20000 base units of USDC on Basehttps://lowpaymentfee.com/api/v1/tokens/ZRX/price
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/ZRX/price
- —All APIs are priced at $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com