# Connect my own MCP server **URL:** \ **Category:** Support Help\ **Created:** [November 6, 2025, 11:16pm UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159 "2025-11-06T23:16:07Z")\ **Posts on this page:** 6\ **Page:** 1
**Author:** ![alex.baca](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/alex.baca/32/81_2.png) [@alex.baca](https://community.retellai.com/u/alex.baca)\ **Post date:** [November 6, 2025, 11:16pm UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159/1 "2025-11-06T23:16:07Z")
Hi, can I add my own MCP to use with components? ---
**Author:** ![support2](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/support2/32/15_2.png) [@support2](https://community.retellai.com/u/support2)\ **Post date:** [November 6, 2025, 11:16pm UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159/2 "2025-11-06T23:16:25Z")
**Yes, you can add your own MCP (Model Context Protocol) server to use with Retell AI agents.**[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp)[(2)](https://www.retellai.com/blog/connect-any-ai-voice-agent-to-mcp-with-retell-ai-mcp-node)[(3)](https://www.youtube.com/watch?v=efmWhp8Pd5I) To add your custom MCP server to Retell AI:[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp)[(3)](https://www.youtube.com/watch?v=efmWhp8Pd5I) 1. Click on **+ Add MCP** in your agent configuration[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp) 2. Enter your MCP server URL (the endpoint where your MCP server is hosted)[(3)](https://www.youtube.com/watch?v=efmWhp8Pd5I) 3. Optionally set custom request headers and query parameters[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp) 4. Select the MCP tool from the list of available tools[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp) 5. Optionally set response variables to extract values from the MCP tool response and save them as dynamic variables[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp) 6. Save the MCP Tool[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp) 7. Update your agent’s prompt to explicitly indicate when to invoke the MCP tool[(1)](https://docs.retellai.com/build/single-multi-prompt/mcp) Your MCP server must expose the proper endpoints that Retell AI can call.[(2)](https://www.retellai.com/blog/connect-any-ai-voice-agent-to-mcp-with-retell-ai-mcp-node)[(3)](https://www.youtube.com/watch?v=efmWhp8Pd5I) The MCP server acts as a secure endpoint that mediates requests from your agent to your external tools.[(2)](https://www.retellai.com/blog/connect-any-ai-voice-agent-to-mcp-with-retell-ai-mcp-node) You can connect to any HTTP-based service like Zapier, custom APIs, AWS Lambda, or cloud functions.[(2)](https://www.retellai.com/blog/connect-any-ai-voice-agent-to-mcp-with-retell-ai-mcp-node)[(3)](https://www.youtube.com/watch?v=efmWhp8Pd5I) ---
**Author:** ![alex.baca](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/alex.baca/32/81_2.png) [@alex.baca](https://community.retellai.com/u/alex.baca)\ **Post date:** [November 6, 2025, 11:17pm UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159/3 "2025-11-06T23:17:54Z")
This is what my provider gave me, where do I need to add this info? { “mcpServers”: { “context7”: { “url”: “[https://mcp.context7.com/mcp](https://mcp.context7.com/mcp)”, “headers”: { “CONTEXT7\_API\_KEY”: “YOUR\_API\_KEY” } } } } ---
**Author:** ![support2](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/support2/32/15_2.png) [@support2](https://community.retellai.com/u/support2)\ **Post date:** [November 6, 2025, 11:18pm UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159/4 "2025-11-06T23:18:20Z")
Based on the configuration your provider gave you, here’s where to add each piece of information in Retell AI:[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) **1. MCP Server URL:** [(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) - Enter `https://mcp.context7.com/mcp` in the **MCP Server Endpoint** field when adding your MCP server[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) **2. API Key Header:** [(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) - In the **Request Headers** section (optional), add:[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) - Header Name: `CONTEXT7_API_KEY`[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) - Header Value: `YOUR_API_KEY` (replace with your actual API key)[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) **Step-by-step in Retell AI:** [(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) 1. Click **+ Add MCP** in your agent configuration[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) 2. In the **MCP Server Endpoint** field, paste: `https://mcp.context7.com/mcp`[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) 3. Under **Set request headers (optional)**, add a new header:[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) - Name: `CONTEXT7_API_KEY`[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) - Value: Your actual Context7 API key[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) 4. Click **Add MCP Tool** and select the tool you want to use[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) 5. Save your configuration[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) The configuration format your provider gave you is a standard MCP server configuration, but Retell AI uses a UI-based approach where you enter the URL and headers separately in their respective fields.[(1)](https://docs.retellai.com/build/conversation-flow/mcp-node)[(2)](https://docs.retellai.com/build/single-multi-prompt/mcp) \*\* ---
**Author:** ![alex.baca](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/alex.baca/32/81_2.png) [@alex.baca](https://community.retellai.com/u/alex.baca)\ **Post date:** [November 6, 2025, 11:19pm UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159/5 "2025-11-06T23:19:18Z")
Oh this is good, solved thank you! ---
**Author:** ![mike](https://yyz2.discourse-cdn.com/flex008/user_avatar/community.retellai.com/mike/32/969_2.png) [@mike](https://community.retellai.com/u/mike)\ **Post date:** [March 5, 2026, 11:49am UTC](https://community.retellai.com/t/connect-my-own-mcp-server/159/6 "2026-03-05T11:49:07Z")
1. I created an agent 2. connected my MCP and defined the variables needed for the query (no header) 3. MCP function is also set. Screenshot: [https://photos.app.goo.gl/37JwSmf2mLpRDYBF9](https://photos.app.goo.gl/37JwSmf2mLpRDYBF9) (I’m not allowed to upload more than one picture in this forum) 4. In the instructions I define those variables: [https://photos.app.goo.gl/g5wDCUJddziiBvq68](https://photos.app.goo.gl/g5wDCUJddziiBvq68) 5. But it doesn’t work. Looks like retell is sending an empty request: Failed to get LLM response Error: Error encountered in LLM call: Failed to get response from any LLM provider. errorMsgs: [400 Invalid schema for function ‘bilabot\_k\_nodes’: [None, ‘null’] is not valid under any of the given schemas., 400 Invalid schema for function ‘bilabot\_k\_nodes’: [None, ‘null’] is not valid under any of the given schemas., 400 Invalid schema for function ‘bilabot\_k\_nodes’: [None, ‘null’] is not valid under any of the given schemas.]