Stock market quote for MRK via x402 micropayment on Base, $0.02 per request in USDC.
What it does
This endpoint provides a market quote for the ticker symbol MRK (Merck & Co.) through an x402-enabled pay-per-call API hosted at lowpaymentfee.com. The endpoint accepts POST requests and returns JSON. Payment is settled on the Base network using USDC (contract 0x8335…2913) at a cost of $0.02 per request (20,000 base units with 6 decimals). No API keys, rate limits, or subscriptions are required — each call is individually paid via the x402 protocol's X-PAYMENT header.
The provider site lowpaymentfee.com offers a broad catalog of x402-gated endpoints spanning finance, AI/ML, data analytics, and utility services, all priced uniformly at $0.02 per request. This specific endpoint falls under the Finance & Web3 category. The site's documentation pages were largely empty at crawl time (showing only a "Connect wallet" prompt), so detailed request/response schemas, field definitions, and example payloads are not available. The endpoint is confirmed live: it returns a proper 402 challenge with x402Version 1 and an "exact" payment scheme.
Because no OpenAPI spec, request body schema, or sample response was found, consumers should expect to experiment with the POST body to determine required parameters (e.g., whether additional fields beyond the ticker in the URL path are needed). The lack of documentation is a notable gap.
Capabilities
Use cases
- —Fetching a real-time or recent market quote for Merck (MRK) in an automated trading or research pipeline
- —Agent-driven portfolio monitoring that pays per data request without managing API keys
- —Integrating stock quote data into a Web3 application that already settles on Base
Fit
Best for
- —Developers wanting key-less, pay-per-call access to MRK market data
- —AI agents that can settle USDC micropayments on Base autonomously
- —Prototyping financial dashboards without subscription commitments
Not for
- —High-frequency trading requiring sub-millisecond latency and bulk data feeds
- —Users who need comprehensive 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/MRK \
-H "Content-Type: application/json" \
-H "X-PAYMENT: <x402_payment_token>"Endpoint
Quality
The endpoint is confirmed live with a valid 402 challenge and clear pricing, but there is no OpenAPI spec, no request/response schema, no documentation beyond a wallet-connect prompt, and no example payloads. The listing is largely inferred from the URL path and the x402 challenge metadata.
Warnings
- —No OpenAPI or schema documentation available — request body format and response fields are unknown.
- —Documentation pages (/docs, /api, /pricing, /README) all returned only a 'Connect wallet' prompt with no useful content.
- —The exact data source, freshness, and fields returned in the market quote are unverified.
- —The provider site lists many endpoints across diverse categories (AI, analytics, finance, utilities) all at the same price, which may indicate a demo or early-stage service.
Citations
- —Endpoint returns HTTP 402 with x402Version 1, exact scheme, on Base network, asset 0x833589fCD6eDb6E08f4c7C32D4f71b54bdA02913 (USDC), maxAmountRequired 20000https://lowpaymentfee.com/api/v1/market/quote/MRK
- —Provider advertises $0.02 per request, no API keys, no rate limits, instant access, Base networkhttps://lowpaymentfee.com
- —Site lists finance endpoints including /api/v1/finance/prices, /api/v1/crypto/quotes, and others at $0.02 eachhttps://lowpaymentfee.com