Pay-per-call stock quote for AMGN (Amgen) via x402 on Base, settled in USDC.
What it does
This endpoint provides stock data for Amgen (ticker: AMGN) through the lowpaymentfee.com platform, an x402-enabled API marketplace. The endpoint is accessed via HTTP POST and returns JSON. Payment is handled inline using the x402 protocol on the Base network, settling in USDC (contract 0x8335…2913). Each request costs $0.02 (20,000 base units of USDC with 6 decimals).
The provider, lowpaymentfee.com, offers a broad catalog of pay-per-call APIs spanning data analytics, AI/ML inference, finance, crypto, and utility services — all at a flat $0.02 per request. The platform advertises no API keys, no rate limits, and instant access. However, documentation is extremely sparse: the /docs, /pricing, /api, and /README pages all render only a "Connect wallet" prompt with no further technical detail. There is no OpenAPI spec, no example request/response payloads, and no description of what fields the stock endpoint returns.
Because the specific response schema for the AMGN stock endpoint is undocumented, consumers should expect a JSON object with typical stock-quote fields (price, volume, change, etc.) but must verify empirically. The endpoint is confirmed live via a valid 402 challenge.
Capabilities
Use cases
- —Fetching real-time or recent stock data for Amgen (AMGN) in automated trading or analytics pipelines
- —Agent-driven portfolio monitoring that pays per call without managing API keys
- —Integrating stock quotes into AI agent workflows using x402 micropayments
Fit
Best for
- —AI agents or bots that need keyless, on-demand stock data
- —Developers prototyping financial apps who want zero-signup API access
- —Micropayment-native workflows on the Base L2 network
Not for
- —High-frequency trading requiring sub-millisecond latency and guaranteed SLAs
- —Users who need comprehensive historical OHLCV data with documented schemas
- —Anyone without a Base-network USDC wallet
Quick start
curl -X POST https://lowpaymentfee.com/api/v1/stocks/AMGN \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402-payment-header>"Endpoint
Quality
The endpoint is confirmed live via a valid x402 402 challenge, and pricing is clear ($0.02/request in USDC on Base). However, there is no OpenAPI spec, no documented request/response schema, no example payloads, and all documentation pages are empty beyond a wallet-connect prompt. The actual data returned is unknown.
Warnings
- —No OpenAPI or schema documentation available — response format must be discovered empirically
- —All doc pages (/docs, /pricing, /api, /README) render only 'Connect wallet' with no technical content
- —The provider lists many diverse API categories (AI, analytics, finance, utilities) all at $0.02 — unclear whether all are fully implemented
- —No information on data source, freshness, or accuracy of stock quotes
Citations
- —Endpoint returns HTTP 402 with x402 challenge advertising USDC on Base network at maxAmountRequired 20000https://lowpaymentfee.com/api/v1/stocks/AMGN
- —Platform advertises $0.02/request, no API keys, no rate limits, instant accesshttps://lowpaymentfee.com
- —USDC asset contract on Base: 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913https://lowpaymentfee.com/api/v1/stocks/AMGN