Historical stock price data for COIN (Coinbase), paid per request via x402 on Base.
What it does
This endpoint at lowpaymentfee.com returns historical stock data for the ticker COIN (Coinbase Global). It is part of a broader suite of pay-per-request APIs offered by the same provider, spanning finance, analytics, AI/ML, and utility categories. The endpoint uses the x402 payment protocol on the Base network, accepting USDC (USD Coin) for payment. Each request costs up to $0.02 (20,000 base units of USDC with 6 decimals).
The endpoint is live and responds with a 402 challenge when called without payment. It accepts POST requests and returns JSON. No API keys or rate limits are advertised — access is gated purely by micropayment. However, documentation is extremely sparse: the crawled docs, API, pricing, and README pages all returned only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI schema, no request/response examples, and no description of what fields the historical stock data includes or what query parameters are accepted.
Because of the lack of documentation, the actual data source, coverage period, granularity, and response schema are unknown. Users should expect to experiment with the endpoint to discover its capabilities. The provider's landing page lists a uniform $0.02/request price across all endpoints and advertises no API keys, no rate limits, and instant access on the Base network.
Capabilities
Use cases
- —Retrieving historical price data for Coinbase (COIN) stock for backtesting or analysis
- —Building dashboards that display COIN stock performance over time
- —Automated agents that need on-demand stock history without API key management
Fit
Best for
- —Agents or apps needing quick, keyless access to COIN historical stock data
- —Micropayment-native workflows on Base that want pay-per-call pricing
- —Developers prototyping financial tools without subscription commitments
Not for
- —Production systems requiring documented, stable API contracts with known response schemas
- —Users needing broad multi-ticker stock data coverage (only COIN ticker is confirmed at this endpoint)
- —Anyone who cannot pay with USDC on the Base network
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/COIN/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 schema, no request/response examples, and all documentation pages returned only a wallet-connect prompt. The actual data content, query parameters, and response format are entirely unknown.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no technical content.
- —No OpenAPI or request/response schema provided; request parameters and response fields are unknown.
- —Data source and coverage for COIN historical stock data are unverified.
- —Only the COIN ticker endpoint was probed; generalizability to other tickers is unconfirmed.
Citations
- —The endpoint returns a 402 challenge with maxAmountRequired of 20000 base units of USDC on Base networkhttps://lowpaymentfee.com/api/v1/stocks/COIN/history
- —Uniform pricing of $0.02/request across all endpoints, no API keys, no rate limitshttps://lowpaymentfee.com
- —USDC asset address 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 on Basehttps://lowpaymentfee.com/api/v1/stocks/COIN/history