MCP server: JSON-RPC 2.0 over streamable HTTP (keyless and free-plan calls not billed; paid-plan calls metered)

The Model Context Protocol server over streamable HTTP. Stateless: every POST is a fresh session. Two URLs, same tools: https://coinlobster.com/mcp/connector signs the user in over OAuth (a free account is live), https://coinlobster.com/mcp is keyless (answers 30 minutes old). Registers 21 tools: coin_brief, market_now, whale_activity, whale_radar, market_screener, liquidations, traders, wallet, signals, situations, history, options, orderbook, news, sectors, big_catch, watch, my_alerts, watchlist_brief, my_access, coin_search. 41 older tool names still answer, each routed to the tool above that now owns it. whale_tape is a deprecated alias of whale_activity, still callable. All read-only except watch, which arms and removes alerts posted to the caller's webhook (Starter and up). my_access reports what the calling connection can see, the caps in force on it and what lifts each one; it is free and never spends credits. Keyless and free-plan calls are never billed: 100 calls a day without an account, 200 calls a day with a free account. The free plans answer BTC in full and any other coin as a headline with its price, 24h change and news, over the last 24 hours. A paid plan (Starter $15, Pro $29, Alpha $99 a month), as an OAuth-connected account or a cl_ key in X-API-Key, answers every coin in full; each successful tools/call then spends 20 to 100 credits, priced by workload, from the balance the website and REST API share. Discovery (initialize, tools/list, ping), failed calls and no-data answers cost nothing. Descriptive market data only, no forecast language.