Pay-per-call stock market quote for MSFT via x402 on Base, settled in USDC.
What it does
This endpoint provides a real-time market quote for Microsoft (MSFT) stock, accessible via the x402 payment protocol. It is part of a broader suite of paid API endpoints hosted at lowpaymentfee.com, which spans data analytics, AI/ML inference, finance, crypto, and utility services. Each call costs $0.02 in USDC on the Base network — no API keys, no rate limits, and no subscriptions required.
The specific endpoint `/api/v1/market/quote/MSFT` accepts HTTP POST requests and returns JSON. Payment is handled inline: callers attach an X-PAYMENT header containing a signed x402 payment voucher for 20,000 base units of USDC (i.e., $0.02, since USDC uses 6 decimals). The payment is settled on-chain to the provider's address on Base. The x402 challenge confirms the endpoint is live and discoverable.
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 spec, no example request/response payloads, and no description of the response schema. The endpoint appears functional based on the 402 challenge, but the exact fields returned in a successful quote response are unknown.
Capabilities
Use cases
- —Fetching a real-time Microsoft stock quote from an AI agent without pre-registering for an API key
- —Integrating pay-per-call equity data into a trading bot that settles micropayments in USDC on Base
- —Building a portfolio dashboard that pulls individual stock quotes on demand
Fit
Best for
- —Agents or bots that need on-demand stock quotes without subscription overhead
- —Developers experimenting with x402 micropayment-gated APIs
- —Use cases requiring keyless, permissionless access to market data
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data feeds
- —Users who need historical OHLCV data or full market depth
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/market/quote/MSFT \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_voucher>"Endpoint
Quality
The x402 challenge is live and confirms pricing and network details, but there is no OpenAPI spec, no documented request/response schema, and all documentation pages render only a wallet-connect prompt. The actual response format for a successful call is entirely unknown.
Warnings
- —No OpenAPI or schema documentation available — response format is unknown
- —All doc/pricing/README pages return only a 'Connect wallet' prompt with no technical content
- —No example responses or field descriptions for the quote endpoint
- —The endpoint path suggests ticker-specific routing (MSFT), but it is unclear whether other tickers are supported or what the full path pattern is
Citations
- —The endpoint returns a 402 challenge requesting 20,000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/market/quote/MSFT
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/market/quote/MSFT
- —All endpoints priced at $0.02 per request with no API keys, no rate limitshttps://lowpaymentfee.com
- —The provider offers endpoints across data analytics, AI/ML, finance, crypto, and utility categorieshttps://lowpaymentfee.com