API Mock Server

Generate a runnable Redis-backed mock API server with 1-hour TTL, hot updates, and dynamic templated responses

json· JSON resultOpen tool

Quick start

Call this tool from your code in three languages.

cURL

curl -X POST 'https://api.elysiatools.com/en/api/tools/api-mock-server' \
  -H 'Content-Type: application/json' \
  -d '{"mockDefinitionJson":"{\n  \"name\": \"User Service Mock\",\n  \"basePath\": \"/api\",\n  \"endpoints\": [\n    {\n      \"method\": \"GET\",\n      \"path\": \"/users/:id\",\n      \"status\": 200,\n      \"responseType\": \"json\",\n      \"dynamicResponse\": true,\n      \"responseBody\": {\n        \"id\": \"{{params.id}}\",\n        \"name\": \"Mock User\",\n        \"trace\": \"{{query.trace}}\",\n        \"requestedAt\": \"{{now}}\"\n      }\n    }\n  ]\n}","mockId":"Reuse an existing ID to hot-update the mock server"}'

API reference

Send a POST request with your inputs as JSON. File parameters require a separate upload first.

Endpoint

HTTP

POST https://api.elysiatools.com/en/api/tools/api-mock-server

Parameters

Name	Type	Required	Description
mockDefinitionJson	textarea	Yes	—
mockId	text	No	—

Response format

JSON result

JSON

{
  "key": {...},
  "metadata": {
    "key": "value"
  },
  "error": "Error message (optional)",
  "message": "Notification message (optional)"
}

MCP integration

Add this tool to your Model Context Protocol server so AI agents can list and call it.

Server configuration

Add this block to your MCP client configuration:

mcp.json

{
  "mcpServers": {
    "elysiatools-api-mock-server": {
      "name": "api-mock-server",
      "description": "Generate a runnable Redis-backed mock API server with 1-hour TTL, hot updates, and dynamic templated responses",
      "baseUrl": "https://api.elysiatools.com/mcp/sse?toolId=api-mock-server",
      "command": "",
      "args": [],
      "env": {},
      "isActive": true,
      "type": "sse"
    }
  }
}

List available tools

After connecting to the SSE endpoint, list the exposed tools:

tools/list

{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/list"
}

Call this tool

Invoke the tool by its id, passing arguments built from its parameters:

tools/call

{
  "jsonrpc": "2.0",
  "id": 2,
  "method": "tools/call",
  "params": {
    "name": "api-mock-server",
    "arguments": {
  "mockDefinitionJson": "{\n  \"name\": \"User Service Mock\",\n  \"basePath\": \"/api\",\n  \"endpoints\": [\n    {\n      \"method\": \"GET\",\n      \"path\": \"/users/:id\",\n      \"status\": 200,\n      \"responseType\": \"json\",\n      \"dynamicResponse\": true,\n      \"responseBody\": {\n        \"id\": \"{{params.id}}\",\n        \"name\": \"Mock User\",\n        \"trace\": \"{{query.trace}}\",\n        \"requestedAt\": \"{{now}}\"\n      }\n    }\n  ]\n}",
  "mockId": "Reuse an existing ID to hot-update the mock server"
}
  }
}

Chain multiple tools in one session with a comma-separated toolId list, e.g. /mcp/sse?toolId=png-to-webp,jpg-to-webp,gif-to-webp (max 20).

Questions or issues? Contact [email protected]