Amazon Lex Runtime Service MCP Server
The Amazon Lex Runtime Service API is a core component of Amazon Lex, Amazon Web Services' fully managed artificial intelligence service for building conversational interfaces into any application using voice and text.
Quick Start Summary
The Amazon Lex Runtime Service MCP server is a Model Context Protocol bridge that connects AI assistants — including Claude Desktop, Cursor, Windsurf, and VS Code Copilot — to the Amazon Lex Runtime Service API through natural language. It exposes 5 API endpoints as callable tools, such as PutSession, DeleteSession, GetSession, and more. No authentication is required — setup takes approximately 30 seconds. The server uses STDIO transport and can be installed by running npx -y @mcp/amazonaws-com-runtime-lex. This integration is sourced from the auto Amazon Lex Runtime Service OpenAPI specification (v2016-11-28) and has a quality score of 40/99 (fair documentation coverage).
Server Details
- Category
- AI & ML
- Authentication
- None
- Endpoints
- 5 operations
- Transport
- STDIO
- Spec Version
- v2016-11-28
- Install Command
npx -y @mcp/amazonaws-com-runtime-lex
Environment Variables
AMAZON_LEX_RUNTIME_SERVICE_API_KEYExample: your_amazon_lex_runtime_service_api_key
Top Endpoints
/bot/{botName}/alias/{botAlias}/user/{userId}/sessionPutSession
/bot/{botName}/alias/{botAlias}/user/{userId}/sessionDeleteSession
/bot/{botName}/alias/{botAlias}/user/{userId}/session/GetSession
/bot/{botName}/alias/{botAlias}/user/{userId}/content#Content-TypePostContent
/bot/{botName}/alias/{botAlias}/user/{userId}/textPostText
One-Click Install
Copy the snippet for your MCP client and paste it in — zero editing required.
Claude Desktop
Add to claude_desktop_config.json
{
"mcpServers": {
"amazonaws-com-runtime-lex": {
"command": "npx",
"args": [
"-y",
"@mcp/amazonaws-com-runtime-lex"
],
"env": {
"AMAZON_LEX_RUNTIME_SERVICE_API_KEY": "your_amazon_lex_runtime_service_api_key"
}
}
}
}Cursor
Settings → MCP Servers → Add
{
"mcpServers": {
"amazonaws-com-runtime-lex": {
"url": "https://mcpbridge.org/config/amazonaws-com-runtime-lex.json"
}
}
}Saves as .cursor/mcp.json in the download. Move it to your project root.
VS Code
Use with MCP extension
{
"mcpServers": {
"amazonaws-com-runtime-lex": {
"url": "https://mcpbridge.org/config/amazonaws-com-runtime-lex.json"
}
}
}Endpoints Explorer
Search and browse the 5 operations supported by this server.
Multi-Language Code Examples
Executable code snippets for calling Amazon Lex Runtime Service endpoints in curl, TypeScript, or Python.
curl -X POST "https://api.apis.guru/v2/specs/amazonaws.com/runtime.lex/2016-11-28/bot/{botName}/alias/{botAlias}/user/{userId}/session" \
-H "Content-Type: application/json" \
# No auth requiredManual Configuration
Directly add this block to your JSON config file, or use the hosted config registry URL.
{
"mcpServers": {
"amazonaws-com-runtime-lex": {
"command": "npx",
"args": ["-y","@mcp/amazonaws-com-runtime-lex"],
"env": {
"AMAZON_LEX_RUNTIME_SERVICE_API_KEY": "your_amazon_lex_runtime_service_api_key"
}
}
}
}Authentication Details
No authentication required. This MCP server runs out-of-the-box.
Documentation Links
Error Handling & HTTP Status Code Matrix
Common status codes, error causes, and resolution steps when invoking Amazon Lex Runtime Service endpoints.
400 Bad RequestCause: Malformed payload parameters or missing required fields.
Resolution: Verify request schema in Endpoints tab before calling tool.
401 UnauthorizedCause: Missing or invalid API key credentials.
Resolution: Set environment variable in MCP client config under env object.
403 ForbiddenCause: Insufficient scope permissions for requested resource.
Resolution: Verify key permissions in developer dashboard.
404 Not FoundCause: Resource URL path or requested entity ID does not exist.
Resolution: Check path variables and parameters.
429 Rate Limit ExceededCause: API rate limit quota exceeded.
Resolution: Implement exponential backoff retry in tool call.
500 Internal ErrorCause: Upstream server runtime fault.
Resolution: Inspect STDIO stderr output for log trace.
Quality Score
Checked against our protocol-compliance rules.
Specification Version: v2016-11-28
Page compiled on: June 13, 2026
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📖 Detailed MCP Integration Guide
A technical breakdown of capabilities, agent workflows, and security/configuration best practices.
lex:RecognizeText and lex:DeleteSession, adhering strictly to the principle of least privilege. The MCP server itself should be configured to securely store these credentials, never exposing them in logs or client-side code. It is essential to restrict the botName, botAlias, and userId parameters to known, validated values to prevent injection attacks or unauthorized access to other bots and sessions. Proper error handling should be implemented to manage throttling limits and potential AWS service exceptions gracefully.Similar APIs
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