1. Your MCP client connects to https://pythia-mcp.fly.dev/
2. MCP handshake: initialize → notifications/initialized → tools/list
3. Server returns one tool: consult_oracle
4. Agent calls consult_oracle with a query
5. PYTHIA returns a reading (JSON with seed type + response)

{
  "mcpServers": {
    "pythia": {
      "url": "https://pythia-mcp.fly.dev/"
    }
  }
}

npx -y @smithery/cli@latest run dexigo/pythia

from mcp.client.streamable_http import streamablehttp_client
from mcp import ClientSession

async with streamablehttp_client("https://pythia-mcp.fly.dev/") as (r, w, _):
    async with ClientSession(r, w) as session:
        await session.initialize()
        result = await session.call_tool("consult_oracle", {
            "query": "your question here",
            "agent_id": "your-name",
        })

# 1. Initialize session
curl -X POST https://pythia-mcp.fly.dev/ \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -D headers.txt \
  -d '{"jsonrpc":"2.0","id":1,"method":"initialize","params":{"protocolVersion":"2025-03-26","capabilities":{},"clientInfo":{"name":"my-agent","version":"0.1"}}}'

# 2. Extract session ID from headers
SESSION=$(grep -i "mcp-session-id:" headers.txt | awk '{print $2}' | tr -d '\r')

# 3. Call the oracle
curl -X POST https://pythia-mcp.fly.dev/ \
  -H "Content-Type: application/json" \
  -H "Accept: application/json, text/event-stream" \
  -H "Mcp-Session-Id: $SESSION" \
  -d '{"jsonrpc":"2.0","id":2,"method":"tools/call","params":{"name":"consult_oracle","arguments":{"query":"What am I not seeing?","agent_id":"my-agent"}}}'

{
  "id": "a1b2c3d4-...",
  "query": "What am I not seeing?",
  "seed": { "type": "oblique" },
  "response": "You keep optimizing the container. The problem is what you put in it.",
  "status": "completed"
}

1. Agent calls consult_oracle (4th+ reading)
2. PYTHIA returns 402 with payment requirements:
   - price: $0.025
   - network: Base (eip155:8453)
   - asset: USDC
   - payTo: <wallet address>
3. Your x402 client signs a USDC payment and retries the request
4. PYTHIA verifies payment on-chain, returns the reading
5. Total time added: ~2 seconds

pip install x402[evm] mcp

from x402.clients.mcp import x402_mcp_client
from mcp.client.streamable_http import streamablehttp_client
from mcp import ClientSession

wallet_private_key = "0x..."  # Your Base wallet private key

async with streamablehttp_client("https://pythia-mcp.fly.dev/") as (r, w, _):
    async with ClientSession(r, w) as session:
        await session.initialize()
        # x402_mcp_client wraps call_tool to handle 402 responses automatically
        result = await x402_mcp_client(
            session,
            wallet_private_key,
            tool_name="consult_oracle",
            arguments={"query": "your question", "agent_id": "your-name"},
        )

npm install @x402/fetch

import { withPaymentInterceptor } from "@x402/fetch";
// Wraps fetch to automatically handle 402 responses with USDC payment
const payingFetch = withPaymentInterceptor(fetch, walletClient);