Perplexity MCP Server
by jsonallen
- src
- perplexity_mcp
import asyncio
import aiohttp
import sys
import logging
from mcp.server.models import InitializationOptions
import mcp.types as types
from mcp.server import NotificationOptions, Server
from pydantic import AnyUrl
import mcp.server.stdio
import os
from .__init__ import __version__
server = Server("perplexity-mcp")
@server.list_prompts()
async def handle_list_prompts() -> list[types.Prompt]:
"""
List available prompts.
Each prompt can have optional arguments to customize its behavior.
"""
return [
types.Prompt(
name="perplexity_search_web",
description="Search the web using Perplexity AI and filter results by recency",
arguments=[
types.PromptArgument(
name="query",
description="The search query to find information about",
required=True,
),
types.PromptArgument(
name="recency",
description="Filter results by how recent they are. Options: 'day' (last 24h), 'week' (last 7 days), 'month' (last 30 days), 'year' (last 365 days). Defaults to 'month'.",
required=False,
),
],
)
]
@server.get_prompt()
async def handle_get_prompt(
name: str, arguments: dict[str, str] | None
) -> types.GetPromptResult:
"""
Generate a prompt by combining arguments with server state.
"""
if name != "perplexity_search_web":
raise ValueError(f"Unknown prompt: {name}")
query = (arguments or {}).get("query", "")
recency = (arguments or {}).get("recency", "month")
return types.GetPromptResult(
description=f"Search the web for information about: {query}",
messages=[
types.PromptMessage(
role="user",
content=types.TextContent(
type="text",
text=f"Find recent information about: {query}",
),
),
types.PromptMessage(
role="user",
content=types.TextContent(
type="text",
text=f"Only include results from the last {recency}",
),
),
],
)
@server.list_tools()
async def list_tools() -> list[types.Tool]:
return [
types.Tool(
name="perplexity_search_web",
description="Search the web using Perplexity AI with recency filtering",
inputSchema={
"type": "object",
"properties": {
"query": {"type": "string"},
"recency": {
"type": "string",
"enum": ["day", "week", "month", "year"],
"default": "month",
},
},
"required": ["query"],
},
)
]
@server.call_tool()
async def call_tool(
name: str, arguments: dict
) -> list[types.TextContent | types.ImageContent | types.EmbeddedResource]:
if name == "perplexity_search_web":
query = arguments["query"]
recency = arguments.get("recency", "month")
result = await call_perplexity(query, recency)
return [types.TextContent(type="text", text=str(result))]
raise ValueError(f"Tool not found: {name}")
async def call_perplexity(query: str, recency: str) -> str:
url = "https://api.perplexity.ai/chat/completions"
# Get the model from environment variable or use "sonar" as default
model = os.getenv("PERPLEXITY_MODEL", "sonar")
payload = {
"model": model,
"messages": [
{"role": "system", "content": "Be precise and concise."},
{"role": "user", "content": query},
],
"max_tokens": "512",
"temperature": 0.2,
"top_p": 0.9,
"return_images": False,
"return_related_questions": False,
"search_recency_filter": recency,
"top_k": 0,
"stream": False,
"presence_penalty": 0,
"frequency_penalty": 1,
}
headers = {
"Authorization": f"Bearer {os.getenv('PERPLEXITY_API_KEY')}",
"Content-Type": "application/json",
}
async with aiohttp.ClientSession() as session:
async with session.post(url, json=payload, headers=headers) as response:
response.raise_for_status()
data = await response.json()
return data["choices"][0]["message"]["content"]
async def main():
API_KEY = os.getenv("PERPLEXITY_API_KEY")
if not API_KEY:
raise ValueError("PERPLEXITY_API_KEY environment variable is required")
async with mcp.server.stdio.stdio_server() as (read_stream, write_stream):
await server.run(
read_stream,
write_stream,
InitializationOptions(
server_name="perplexity-mcp",
server_version="0.1.0",
capabilities=server.get_capabilities(
notification_options=NotificationOptions(),
experimental_capabilities={},
),
),
)
def cli():
"""CLI entry point for perplexity-mcp"""
logging.basicConfig(level=logging.INFO)
API_KEY = os.getenv("PERPLEXITY_API_KEY")
if not API_KEY:
print(
"Error: PERPLEXITY_API_KEY environment variable is required",
file=sys.stderr,
)
sys.exit(1)
# Log which model is being used (helpful for debug)
model = os.getenv("PERPLEXITY_MODEL", "sonar")
logging.info(f"Using Perplexity AI model: {model}")
# List available models
available_models = {
"sonar-deep-research": "128k context - Enhanced research capabilities",
"sonar-reasoning-pro": "128k context - Advanced reasoning with professional focus",
"sonar-reasoning": "128k context - Enhanced reasoning capabilities",
"sonar-pro": "200k context - Professional grade model",
"sonar": "128k context - Default model",
"r1-1776": "128k context - Alternative architecture"
}
logging.info("Available Perplexity models (set with PERPLEXITY_MODEL environment variable):")
for model_name, description in available_models.items():
marker = "→" if model_name == model else " "
logging.info(f" {marker} {model_name}: {description}")
asyncio.run(main())
if __name__ == "__main__":
cli()