Historical stock data for AMGN via x402 micropayment on Base, $0.02 per request.
What it does
This endpoint provides historical stock price data for Amgen (AMGN) through the lowpaymentfee.com platform. It is part of a broader suite of pay-per-request APIs covering finance, AI/ML, data analytics, and infrastructure utilities. The endpoint uses the x402 protocol on the Base network, accepting USDC payments at $0.02 per request with no API keys, rate limits, or subscriptions required.
The specific endpoint `/api/v1/stocks/AMGN/history` returns historical stock data in JSON format. Payment is settled on-chain via USDC on Base (contract 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913). The x402 challenge was successfully captured, confirming the endpoint is live and accepting POST requests. The platform advertises a uniform $0.02 per request pricing across all its endpoints.
Documentation is extremely sparse — the docs, API, pricing, and README pages all render only a "Connect wallet" prompt with no further content. 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. The endpoint URL pattern suggests it may support other ticker symbols by substituting the path segment, but this is unconfirmed.
Capabilities
Use cases
- —Retrieving historical price data for Amgen (AMGN) stock
- —Building trading dashboards that pull stock history on demand
- —Agent-driven financial analysis requiring per-call stock data without subscriptions
Fit
Best for
- —Agents or apps needing on-demand stock history without API key management
- —Low-volume or sporadic stock data lookups where pay-per-request is cost-effective
- —x402-native workflows settling payments in USDC on Base
Not for
- —High-frequency trading requiring sub-second latency and bulk data
- —Users who need comprehensive documentation or guaranteed SLAs
- —Non-crypto users who cannot settle payments in USDC on Base
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/AMGN/history \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_header>"Endpoint
Quality
The endpoint is confirmed live via a valid 402 challenge with clear pricing ($0.02 USDC on Base). However, documentation is essentially nonexistent — no request/response schema, no parameter descriptions, no examples. The listing is largely inferred from the URL pattern and the x402 challenge metadata.
Warnings
- —No documentation available — docs, API, pricing, and README pages all show only 'Connect wallet' with no content
- —No OpenAPI schema or request/response examples provided
- —Request parameters and response format for stock history are completely unknown
- —It is unclear whether other ticker symbols are supported beyond AMGN
Citations
- —Endpoint returns 402 with x402 challenge accepting USDC on Base network at maxAmountRequired 20000 (= $0.02)https://lowpaymentfee.com/api/v1/stocks/AMGN/history
- —Platform advertises $0.02 per request with no API keys, no rate limits, and instant access on Base networkhttps://lowpaymentfee.com
- —USDC asset contract on Base is 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/AMGN/history
- —Docs, API, pricing, and README pages render only 'Connect wallet' with no additional contenthttps://lowpaymentfee.com/docs