LlamaIndex agents use Pexafy through its MCP server, https://mcp.pexafy.com/mcp, with your API key in the Authorization header. The agent searches free-to-use photos (Unsplash, Pexels, Pixabay and more) and gets each one back with its licence and credit line.

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Install

pip install llama-index-core llama-index-tools-mcp llama-index-llms-openai
export PEXAFY_API_KEY="pexafy_..."   # free key: pexafy.com/dashboard/api-keys/create
export OPENAI_API_KEY="sk-..."

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Use

import asyncio
import os

from llama_index.core.agent.workflow import FunctionAgent
from llama_index.llms.openai import OpenAI
from llama_index.tools.mcp import BasicMCPClient, McpToolSpec


async def main():
    client = BasicMCPClient(
        "https://mcp.pexafy.com/mcp",
        headers={"Authorization": f"Bearer {os.environ['PEXAFY_API_KEY']}"},
    )
    tools = await McpToolSpec(
        client, allowed_tools=["search_photos", "search_photos_by_image"]
    ).to_tool_list_async()
    agent = FunctionAgent(
        tools=tools,
        llm=OpenAI(model="gpt-5.4-mini"),
        system_prompt="Find free stock photos and give each photo's credit line.",
    )
    print(await agent.run("Find a header photo for a post about remote work."))


asyncio.run(main())
The allowed_tools list keeps the two search tools. The other tools are for chat clients, where a person views a photo grid or links an account. On the free plan, show the credit line next to each photo you publish. See MCP server for the full tool list.