Pay-per-call token data API for UNI via x402 on Base, settled in USDC at $0.02/request.
What it does
This endpoint at lowpaymentfee.com provides token data for UNI (Uniswap) via a simple HTTP POST call, paid per-request using the x402 protocol on the Base network. Payment is settled in USDC (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or upfront commitments are required — callers simply attach an X-PAYMENT header with a valid x402 payment proof.
The endpoint is part of a broader platform (lowpaymentfee.com) that offers dozens of pay-per-call APIs across categories including data & analytics, AI & machine learning, finance & Web3, and infrastructure utilities — all priced uniformly at $0.02 per request. The specific /api/v1/tokens/UNI route sits in the Finance & Web3 category and likely returns token-level data such as price, market cap, or metadata for the UNI token, though the exact response schema is not documented.
Documentation is extremely sparse. The docs, pricing, API, and README pages all render only a "Connect wallet" prompt with no further content. There is no OpenAPI spec, no response schema, and no example payloads available. The endpoint is confirmed live (returns a proper 402 x402 challenge), but callers will need to experiment to discover the exact request and response formats.
Capabilities
Use cases
- —Fetching current UNI token data (price, metadata) on demand
- —Integrating token information into trading bots or dashboards without API key management
- —Agent-driven crypto data retrieval with micropayment settlement
Fit
Best for
- —Agents or bots that need on-demand UNI token data without subscription overhead
- —Developers prototyping crypto dashboards who want instant access with no signup
- —x402-compatible wallets and agents on the Base network
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users needing comprehensive historical token data or OHLCV candles (not documented)
- —Anyone requiring detailed API documentation or response schema before integration
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/UNI \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_proof>"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 response schema, no example requests or responses, and all documentation pages are empty beyond a wallet-connect prompt. The actual data returned is entirely undocumented.
Warnings
- —No API documentation available — docs, pricing, API, and README pages all show only 'Connect wallet'
- —No OpenAPI or response schema provided; request/response format must be discovered experimentally
- —The specific data returned for /api/v1/tokens/UNI is not described anywhere
- —Platform appears to be a generic multi-endpoint storefront; quality and reliability of underlying data sources is unknown
Citations
- —Endpoint returns a valid x402 challenge with maxAmountRequired of 20000 in USDC on Base networkhttps://lowpaymentfee.com/api/v1/tokens/UNI
- —All APIs on the platform are priced at $0.02 per request with no API keys, no rate limits, and instant accesshttps://lowpaymentfee.com
- —USDC asset contract is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/tokens/UNI