Model Context Protocol · free · no signup

CallSphere inside every AI assistant.

One MCP server. Five tools. Plug it into Claude, Claude Desktop, ChatGPT, Cursor, Cline, Windsurf, Continue, Zed, or any agent framework. Search 500+ voice-AI articles, compute industry-specific ROI, fetch case studies, and look up CallSphere facts — directly from the AI you already use.

MCP URLhttps://callsphere.ai/api/mcp

Quick install

No API keys. No OAuth. Public, read-only — same security posture as browsing callsphere.ai/blog.

What you get inside your AI chat

Five purpose-built tools that work in every MCP-capable client. Each response is grounded in CallSphere's production data and links back for deeper context.

search_voice_ai_docs

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.

read_doc

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.

calculate_voice_ai_roi

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 AI voice agents.

get_industry_case_study

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.

get_callsphere_info

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.

Install in 60 seconds

Pick your AI client. Paste the snippet. Restart if asked. Done.

Claude Code (CLI)

Anthropic · official

1. Add the server

claude mcp add --transport http callsphere https://callsphere.ai/api/mcp

2. Verify

claude mcp list

You should see `callsphere` listed. Now ask Claude: "Search CallSphere docs for MCP server tutorials."

Claude Desktop

Anthropic · official

1. Open Settings → Developer → Edit Config, then merge into mcpServers

{
  "mcpServers": {
    "callsphere": {
      "url": "https://callsphere.ai/api/mcp"
    }
  }
}

Save the file, then quit and reopen Claude Desktop. CallSphere tools appear under the 🔌 menu.

Cursor

MCP marketplace

1. Settings → MCP → + Add new MCP server, then paste

{
  "mcpServers": {
    "callsphere": {
      "url": "https://callsphere.ai/api/mcp",
      "transport": "http"
    }
  }
}

Cursor's Composer will discover the tools automatically.

Cline / Continue / Windsurf

VS Code · JetBrains

1. Edit your MCP settings file and add

"callsphere": {
  "url": "https://callsphere.ai/api/mcp",
  "type": "http"
}

Cline: Settings → MCP Servers. Continue: ~/.continue/config.json under `experimental.modelContextProtocolServers`. Windsurf: Cascade → MCP.

ChatGPT / any HTTP client

REST fallback

1. POST a JSON-RPC tools/call to the same URL

curl -sS https://callsphere.ai/api/mcp \
  -H 'Content-Type: application/json' \
  -d '{"jsonrpc":"2.0","id":1,"method":"tools/call",
       "params":{"name":"calculate_voice_ai_roi",
                 "arguments":{"industry":"dental","monthly_calls":1200}}}'

Works from any backend, agent framework (LangChain, LlamaIndex, OpenAI Agents SDK), or scripting environment. Streamable HTTP is the new MCP standard.

What is MCP, and why does this matter?

The Model Context Protocol is an open standard (initially from Anthropic, now adopted by OpenAI, Cursor, Cline, Continue, Zed, Windsurf, and more) for connecting AI assistants to external tools and data sources. One server, every client.

That means the CallSphere MCP server is not Claude-only. It works the same in ChatGPT, Cursor, your custom LangChain agent, or a cron job firing JSON-RPC requests at https://callsphere.ai/api/mcp.

Read-only. No write access to your data, no account required. Same data you can read on the public site.
Stateless. No session storage, no PII retention. Per-IP rate limit (120 requests / minute) prevents abuse.
Free forever for read tools. Future write tools (book a demo, request a callback) will require explicit user verification.

Try these prompts after installing

“Search CallSphere for articles about building MCP servers with Twilio.”

“Calculate the voice-AI ROI for a 4-provider dental practice doing 1,500 calls a month.”

“Show me a case study for HVAC after-hours dispatch.”

“Compare CallSphere pricing tiers and tell me which fits 8,000 calls a month.”

“What languages does CallSphere support, and is it HIPAA-ready?”

“Find the most recent CallSphere post on Claude agentic AI patterns.”

Want voice AI live in your business?

Book a 15-minute call with Sagar (founder). He'll walk you through the math for your specific call volume and show you the live voice agent for your industry.

Book a 15-min call See a live demo