{"schema_version":"2025-06-18","name":"callsphere","title":"CallSphere — Voice AI for any AI assistant","description":"Read-only MCP server giving any AI assistant access to CallSphere's voice-AI knowledge base, ROI calculator, industry case studies, and product facts. Works in Claude, Claude Desktop, Cursor, Cline, Continue, Windsurf, Zed, ChatGPT (via JSON-RPC), and any agent framework.","version":"0.1.0","vendor":{"name":"CallSphere LLC","url":"https://callsphere.ai","contact":"sagar@callsphere.ai","founder":"Sagar Shankaran"},"categories":["voice-ai","business","knowledge-base","calculator","marketing","customer-support"],"tags":["voice-ai","voice-agent","telephony","twilio","claude","agentic-ai","mcp","roi-calculator","callsphere"],"transports":[{"type":"streamable-http","url":"https://callsphere.ai/api/mcp","authentication":"none"}],"capabilities":{"tools":true,"resources":false,"prompts":false,"sampling":false,"roots":false},"tools":[{"name":"search_voice_ai_docs","description":"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."},{"name":"read_doc","description":"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."},{"name":"calculate_voice_ai_roi","description":"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."},{"name":"get_industry_case_study","description":"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."},{"name":"get_callsphere_info","description":"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."}],"protocol_versions":["2025-06-18","2025-03-26","2024-11-05"],"license":"Free, read-only public access. No API key required.","rate_limit":"120 requests / minute per IP. No daily cap.","install_url":"https://callsphere.ai/mcp","docs_url":"https://callsphere.ai/mcp","homepage":"https://callsphere.ai","repository":null,"icon":"https://callsphere.ai/mcp-logo.png","icon_large":"https://callsphere.ai/mcp-logo-1024.png","related_manifests":{"agent_card":"https://callsphere.ai/.well-known/agent.json","ucp":"https://callsphere.ai/.well-known/ucp","agents_json":"https://callsphere.ai/agents.json","agents_md":"https://callsphere.ai/agents.md","llms_txt":"https://callsphere.ai/llms.txt","agentic_sitemap":"https://callsphere.ai/sitemap_agentic_discovery.xml"},"commerce_mcp_url":"https://callsphere.ai/api/ucp/mcp"}