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The Agent Trade Protocol (ATP) lets you automatically charge for AI agent usage on Solana, with payments enforced at the middleware layer. This quickstart walks you through the minimum steps to:
  • Install the ATP library
  • Protect a single FastAPI endpoint with ATP
  • Send a paid request from a client
For deeper details, see the full ATP Overview, Middleware, and Client pages.

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1. Install ATP

Make sure you have Python 3.8+ installed, then install the ATP library: 
pip install -U swarms atp-protocol fastapi uvicorn
Or with uv: 
uv pip install -U atp-protocol

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2. Configure environment variables

Create a .env file (or export these in your environment) so secrets never live in code: 
OPENAI_API_KEY="your-openai-api-key"
RECIPIENT_PUBKEY="your-solana-wallet-public-key"
ATP_SETTLEMENT_URL="https://facilitator.swarms.world"

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3. Set up a Swarms + ATP FastAPI server

Use the Swarms integration example (simplified from swarms/server.py) as your starting point: 
import os
from fastapi import FastAPI, HTTPException
from fastapi.responses import JSONResponse
from loguru import logger
from swarms import Agent, count_tokens
from atp.middleware import ATPSettlementMiddleware
from atp.schemas import PaymentToken

AGENT_MODEL = "gpt-4o-mini"

app = FastAPI(
    title="ATP Protocol + Swarms Integration",
    description="Example API showing ATP payment processing with Swarms agents",
)

# Read config from env
RECIPIENT_PUBKEY = os.getenv("RECIPIENT_PUBKEY", "YourSolanaWalletHere")
ATP_SETTLEMENT_URL = os.getenv("ATP_SETTLEMENT_URL", "https://facilitator.swarms.world")

agent = Agent(
    model_name=AGENT_MODEL,
    max_loops=1,
    interactive=False,
)

app.add_middleware(
    ATPSettlementMiddleware,
    allowed_endpoints=["/v1/agent/execute"],
    input_cost_per_million_usd=10.0,
    output_cost_per_million_usd=30.0,
    recipient_pubkey=RECIPIENT_PUBKEY,
    payment_token=PaymentToken.SOL,
    wallet_private_key_header="x-wallet-private-key",
    require_wallet=True,
    settlement_service_url=ATP_SETTLEMENT_URL,
)


@app.post("/v1/agent/execute")
async def execute_agent(request: dict):
    task = request.get("task", "")
    if not task:
        raise HTTPException(status_code=400, detail="Task is required")

    input_tokens = count_tokens(task, model=AGENT_MODEL)
    logger.info(f"Executing agent task: {task[:100]}...")
    result = agent.run(task)
    output_tokens = count_tokens(str(result), model=AGENT_MODEL)

    return JSONResponse(
        content={
            "output": result,
            "task": task,
            "usage": {
                "input_tokens": input_tokens,
                "output_tokens": output_tokens,
                "total_tokens": input_tokens + output_tokens,
            },
        }
    )
Then run the server: 
uvicorn server:app --host 0.0.0.0 --port 8000

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4. Make a paid request with the ATP client

Use the ATP client to call your ATP‑protected endpoint. The client:
  • Adds the wallet header
  • Waits for settlement
  • Returns the decrypted response plus payment details
import asyncio
from atp.client import ATPClient


async def main():
    client = ATPClient(
        wallet_private_key="[1,2,3,...]",  # Your Solana wallet private key
        settlement_service_url="https://facilitator.swarms.world",
        settlement_timeout=300.0,
    )

    response = await client.post(
        url="http://localhost:8000/v1/agent/execute",
        json={"task": "Write a short product description for ATP."},
    )

    print("Agent output:", response["output"])
    print("Settlement status:", response.get("atp_settlement_status"))
    print("Payment details:", response.get("atp_settlement"))


if __name__ == "__main__":
    asyncio.run(main())

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5. What to look for

On a successful call, the JSON response will include:
  • output: your agent’s output (decrypted)
  • atp_usage: normalized token counts
  • atp_settlement: payment breakdown and transaction signature
  • atp_settlement_status: should be "paid" when settlement succeeds
If payment fails (for example, insufficient funds or missing wallet key), the response remains encrypted and atp_settlement_status will be "failed". See ATP Overview for full error examples and troubleshooting tips.