What transport does Callsphere use?
Streamable HTTP. The endpoint is `https://callsphere.ai/api/mcp`.

@CallSphere-LLC
基本情報
Public MCP server for voice AI — search 500+ articles, compute industry ROI, fetch case studies. Works in Claude, ChatGPT, Cursor, Cline, and any MCP-capable AI assistant.
以下の設定を使って、このサーバーを MCP 対応クライアントに追加してください。
{
"mcpServers": {
"callsphere": {
"command": "npx",
"args": [
"-y",
"mcp-remote",
"https://callsphere.ai/api/mcp"
]
}
}
}Search CallSphere's published articles on voice AI, MCP, Claude, agentic AI, Twilio/WebRTC, and how-to guides. Returns up to N matching posts with title, description, slug, date, and tags. Use this first to discover relevant content, then call `read_doc` with a slug for the full body.
Fetch the full text of a single CallSphere blog post by its slug (e.g. from search_voice_ai_docs results). Returns the title, metadata, and full markdown/HTML body.
Compute a CallSphere ROI estimate for a business: monthly + annual savings, after-hours revenue recovery, recommended plan, and payback period. Industry-aware defaults are applied when optional inputs are omitted. Useful for business owners evaluating CallSphere's AI agent platform — voice agents (the flagship front door) plus chat agents, both of which automate your business workflows.
Return a narrative case study for one of CallSphere's 6 live industries: problem, solution, measurable results, customer quote. Use when a user asks 'who else has done this?' or wants social proof.
Look up canonical CallSphere facts: pricing tiers, supported industries, founder contact, integrations, compliance posture, supported languages, or demo links. Use 'all' to get a full overview.
Callsphere is a public, read-only Model Context Protocol (MCP) server that gives any AI assistant – including Claude, Cursor, Cline, Continue, Windsurf, Zed, or ChatGPT via JSON-RPC – direct access to CallSphere’s voice‑AI knowledge base, industry ROI calculator, case studies for six verticals, and product facts.
Connect to https://callsphere.ai/api/mcp using Streamable HTTP transport. Install with claude mcp add --transport http callsphere https://callsphere.ai/api/mcp (Claude Code) or add it to your client’s MCP config (Claude Desktop, Cursor, Cline/Continue/Windsurf). For clients without MCP support, send plain JSON‑RPC 2.0 POST requests to the same endpoint.
Streamable HTTP. The endpoint is `https://callsphere.ai/api/mcp`.
No – it is free, public, and read‑only. No API key or sign‑up is needed.
120 requests per minute per IP address.
Yes – ChatGPT and any HTTP client can call the endpoint with plain JSON‑RPC 2.0 POST requests (example curl provided in the README).
Five tools: `search_voice_ai_docs`, `read_doc`, `calculate_voice_ai_roi`, `get_industry_case_study`, and `get_callsphere_info`.
Phase 2 write tools (outbound demo calls, newsletter signup, demo booking) are intentionally paused because they would incur per‑call costs on free public infrastructure.

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