Historical stock data for MMC (Marsh & McLennan) via x402 micropayment on Base.
What it does
This endpoint provides historical stock price data for the ticker MMC (Marsh & McLennan Companies) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering finance, analytics, AI/ML, and infrastructure utilities, all settled via the x402 protocol on the Base network using USDC.
The endpoint accepts POST requests and returns JSON. Payment is handled inline via the X-PAYMENT header using the x402 exact-amount scheme. The maximum cost per request is $0.02 (20,000 base units of USDC with 6 decimals). The platform advertises no API keys, no rate limits, and instant access — you pay per call with no subscriptions or commitments.
Documentation beyond the landing page is extremely 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 request/response schema, and no example payloads available from the crawl. The exact fields returned (e.g., OHLCV candles, date ranges, pagination) are unknown and must be discovered by making a paid request.
Capabilities
Use cases
- —Retrieving historical stock price data for MMC (Marsh & McLennan) for backtesting or analysis
- —Integrating pay-per-call stock history into an AI agent's financial research workflow
- —Building dashboards that pull historical equity data without managing API keys or subscriptions
Fit
Best for
- —Agents or apps needing on-demand historical stock data without subscription overhead
- —Developers who want to pay per request using crypto (USDC on Base)
- —Quick prototyping where API key management is undesirable
Not for
- —High-frequency trading requiring sub-second latency and guaranteed SLAs
- —Users needing comprehensive multi-ticker bulk historical data downloads
- —Anyone without a Base-compatible USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/MMC/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is live (402 challenge captured) and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no request/response schema, no documentation, and no examples. The docs pages are empty beyond a wallet-connect prompt. The actual data returned is entirely unknown.
Warnings
- —No documentation available — /docs, /pricing, /api, and /README all return only a 'Connect wallet' prompt with no technical content.
- —No OpenAPI or request/response schema provided; input parameters and output format are unknown.
- —The specific data fields, date range support, and pagination behavior for the stock history endpoint are undocumented and must be discovered empirically.
- —The provider hosts a very broad set of endpoints (AI, finance, utils) at uniform $0.02 pricing, which may indicate a generic wrapper rather than a specialized data provider.
Citations
- —The endpoint returns a 402 challenge with x402Version 1, exact scheme, on Base network, with maxAmountRequired of 20000 base units of USDC (asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913).https://lowpaymentfee.com/api/v1/stocks/MMC/history
- —The platform advertises $0.02 per request, no API keys, no rate limits, instant access, Base network.https://lowpaymentfee.com
- —The platform offers APIs across Data & Analytics, AI & Machine Learning, Finance & Web3, and Infrastructure categories.https://lowpaymentfee.com