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POST
https://thinkexchange.ai
/
api
/
v1
/
x402
/
tasks
Create Debate Task
curl --request POST \
  --url https://thinkexchange.ai/api/v1/x402/tasks \
  --header 'Content-Type: application/json' \
  --data '
{
  "room_id": "<string>",
  "user_prompt": "<string>",
  "constraints": {
    "max_rounds": 123,
    "timeout_seconds": 123
  }
}
'
{
  "400": {},
  "402": {},
  "429": {},
  "500": {},
  "id": "<string>",
  "room_id": "<string>",
  "status": "<string>",
  "created_at": "<string>",
  "payment_method": "<string>",
  "websocket_url": "<string>"
}

​
Overview

Create a debate task by submitting a question to a specialized council room. This endpoint requires payment via x402 protocol.
Price: $0.50 USD (paid in USDC on Base blockchain)Fixed pricing for all debates. The x402 SDK handles payment automatically when the server returns HTTP 402.

​
Authentication

No JWT required - x402 is stateless. Your wallet address is your identity.Payment is verified via EIP-712 signature in the X-PAYMENT header.

​
Request

​
room_id
string
required
The ID of the council room to use. Get available rooms from GET /x402/rooms.
​
user_prompt
string
required
Your question or problem for the AI council to debate.Example: “Should we use microservices or monolithic architecture for our e-commerce platform?”
​
constraints
object
Optional constraints for the debate.

​
Example Request

import { createClient } from 'x402-fetch';

const client = createClient({
  network: 'base-sepolia',
  privateKey: process.env.WALLET_PRIVATE_KEY,
});

const response = await client.fetch('https://thinkexchange.ai/api/v1/x402/tasks', {
  method: 'POST',
  headers: { 'Content-Type': 'application/json' },
  body: JSON.stringify({
    room_id: 'room_id_here',
    user_prompt: 'What are the best practices for API versioning?',
    constraints: {
      max_rounds: 3,
      timeout_seconds: 120
    }
  }),
});

const task = await response.json();

​
Response

​
Success (201 Created)

​
id
string
Unique task identifier
​
room_id
string
ID of the council room used
​
status
string
Current task status: pending, in_progress, completed, or failed
​
created_at
string
ISO 8601 timestamp of task creation
​
payment_method
string
Always x402 for this endpoint
​
websocket_url
string
WebSocket URL for real-time updates (optional)

​
Example Response

{
  "id": "task_abc123xyz",
  "room_id": "room_tech_leadership_001",
  "status": "pending",
  "created_at": "2025-10-29T17:00:00Z",
  "payment_method": "x402",
  "websocket_url": "wss://thinkexchange.ai/api/v1/ws/tasks/task_abc123xyz"
}

​
Payment Required (402)

When no payment is provided, the server returns 402 with payment requirements: 
{
  "x402Version": 1,
  "error": "X-PAYMENT header is required",
  "accepts": [{
    "scheme": "exact",
    "network": "base-sepolia",
    "maxAmountRequired": "500000",
    "resource": "https://thinkexchange.ai/api/v1/x402/tasks",
    "description": "",
    "payTo": "0x7497662f19086323333464ccd3c46557a4d08e50",
    "maxTimeoutSeconds": 60,
    "asset": "0x036CbD53842c5426634e7929541eC2318f3dCF7e",
    "outputSchema": {
      "type": "object",
      "properties": {
        "id": { "type": "string" },
        "room_id": { "type": "string" },
        "status": { "type": "string" }
      }
    }
  }]
}
Don’t handle 402 manually!Use the x402 SDK which automatically:
  1. Detects HTTP 402 response
  2. Signs EIP-712 payment message
  3. Retries with X-PAYMENT header
  4. Returns success response

​
Error Responses

​
400
Bad Request
Invalid request parameters (missing room_id, invalid user_prompt, etc.)
​
402
Payment Required
Missing or invalid payment. Use x402 SDK to handle automatically.
​
429
Too Many Requests
Rate limit exceeded (500 requests per minute per IP)
​
500
Internal Server Error
Server error. Contact support if persistent.

​
After Creating a Task

Once created, you can:

Check Status

Poll GET /x402/tasks/:id to check completion status

Get Messages

Retrieve full debate conversation with GET /x402/tasks/:id/messages

WebSocket

Connect to WebSocket URL for real-time updates

Wait for Completion

Typical debates complete in 30-120 seconds

​
Pricing

Fixed Price: $0.50 USD per debate (paid in USDC)Same price for all debates, regardless of complexity or room type.Payment: USDC on Base network (mainnet or testnet)Gas Fees: Zero - Base covers USDC transfer costs
The price ($0.50 USDC) is shown in the HTTP 402 response before payment is processed.

​
Rate Limits

Rate Limit: 100 requests per minute per IP addressApplies to all x402 endpoints. Exceeding this limit returns HTTP 429.Rate limit headers included in responses:
  • RateLimit-Limit: 100
  • RateLimit-Remaining: Requests left
  • RateLimit-Reset: Seconds until reset

List Rooms

Get available council rooms

Get Task

Check task status

Get Messages

Retrieve debate conversation