Pay-per-call token data API for STX — $0.02 per request via x402 on Base.
What it does
This endpoint at lowpaymentfee.com provides token data for STX (Stacks) via a simple POST request, settled with USDC on the Base network using the x402 payment protocol. Each call costs $0.02 (20,000 base units of USDC with 6 decimals). No API keys, rate limits, or upfront commitments are required — payment is handled inline via the X-PAYMENT header.
The endpoint is part of a broader platform offering dozens of pay-per-call APIs spanning data analytics, AI/ML inference, finance/Web3 market data, and utility services, all priced uniformly at $0.02 per request. The specific `/api/v1/tokens/STX` route appears to fall under the Finance & Web3 category, likely returning price or market data for the STX token, though the exact response schema is not documented.
Documentation is extremely sparse — the docs, pricing, and API pages all render only a "Connect wallet" prompt with no further detail. There is no OpenAPI spec, no example request/response payloads, and no description of the response format beyond the MIME type `application/json`. The x402 challenge is live and well-formed, confirming the endpoint is operational and accepting payments to address `0x1A2B13E97f5F837C8F9FA1F95a1484B7C70d85F3` in USDC (`0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913`) on Base.
Capabilities
Use cases
- —Fetching current STX token price or market data in an automated pipeline
- —Agent-driven portfolio tracking that needs on-demand token quotes
- —Building a dashboard that pulls live STX data without managing API keys
Fit
Best for
- —AI agents or bots that can settle x402 payments on Base
- —Developers who want zero-signup, pay-as-you-go token data
- —Low-volume or bursty workloads where per-call pricing is economical
Not for
- —High-frequency trading requiring sub-second latency guarantees (no SLA documented)
- —Users who need detailed historical OHLCV data (response schema unknown)
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/tokens/STX \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-token>"Endpoint
Quality
The x402 challenge is live and well-formed, confirming the endpoint works and pricing is clear ($0.02 USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages render only 'Connect wallet'. The actual data returned is unknown.
Warnings
- —No OpenAPI or schema documentation available — response format is entirely undocumented
- —All doc/pricing/API pages return only a 'Connect wallet' prompt with no usable content
- —Exact fields returned for /api/v1/tokens/STX are unknown; 'token data' is inferred from the URL pattern
- —No SLA, rate-limit, or uptime guarantees documented
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base at 20000 base units (~$0.02)https://lowpaymentfee.com/api/v1/tokens/STX
- —Platform advertises $0.02/request, no API keys, no rate limits, instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/tokens/STX
- —Docs, pricing, API, and README pages all render only 'Connect wallet'https://lowpaymentfee.com/docs