FastAPIapp returns error

General
1

Hello,

I tried using built-in fastAPI following this sample

  1. I think there’s a typo here
fastapi_app = FastAPIApp(
    agent=basic_agent,
    name="Basic Agent",
    app_id="basic_agent",
    description="A basic agent that can answer questions and help with tasks.",
)

where it should be agents=[basic_agent]. cmiiw

  1. when I run the updated python script and call the API with either this
curl -X 'POST' \
  'http://localhost:8119/runs?agent_id=basic_agent' \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -F 'message=who founded python?' \
  -F 'stream=true'

or this

curl -X POST \
  'http://localhost:8119/runs' \
  -H 'accept: application/json' \
  -H 'Content-Type: multipart/form-data' \
  -F 'agent_id=basic_agent' \
  -F 'message=who founded python?' \
  -F 'stream=true'

this is what I got

{
  "detail": "Agent not found"
}

Did I miss something? Thanks!

2

Ok, after some trials end errors, this works

from agno.agent import Agent
from agno.app.fastapi.app import FastAPIApp
from agno.models.openai import OpenAIChat
from agno.models.openrouter import OpenRouter
from dotenv import load_dotenv
import asyncio
import os

# Load environment variables
load_dotenv()

basic_agent = Agent(
    name="Basic Agent",
    agent_id="basic_agents",
    model=OpenRouter(
        id="openai/gpt-4.1-mini",
        api_key=os.getenv("OPENROUTER_API_KEY")), # Ensure OPENAI_API_KEY is set
    add_history_to_messages=True,
    num_history_responses=3,
    add_datetime_to_instructions=True,
    markdown=True,
)

# Async router by default (use_async=True)
fastapi_app = FastAPIApp(
    agents=[basic_agent],
    name="Basic Agent",
    app_id="basic",
    description="A basic agent that can answer questions and help with tasks.",
)

# ✅ Add this
print("Registered agents:")
for agent in fastapi_app.agents:
    print(f" - {agent.name} (app_id: {agent.app_id}, agent_id: {agent.agent_id})")

app = fastapi_app.get_app()

# For synchronous router:
# app = fastapi_app.get_app(use_async=False)

if __name__ == "__main__":
    fastapi_app.serve(app="agent_fastapi:app", port=8119, reload=True)
1 Like
3

Hey @eibednejo
We are glad to see that you resolved the issue. Please let us know if you still want our team inputs - Happy to tag in engineers.