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OpenWeb Ninja Copilot — AI Chat via x402
x402
OpenWeb Ninja Copilot — AI Chat via x402 is a paid API for AI agents from x402.openwebninja.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-15).
Send a message to an AI Copilot (normal chat, reasoning, or GPT-5 mode) and receive a response, paid per call via x402 with no API key required.
Price / call$0.005
Success—
StatusUnknown
How this service works
40+ public web-data, SERP, e-commerce, real-estate, finance and AI-search APIs, payable per call over x402 (USDC on Base, Polygon, Arbitrum). No account or API key required. Most endpoints $0.003; AI-model endpoints $0.005.
Output
Returns a JSON object containing the AI-generated text reply (in plain text or markdown depending on the flag), along with a conversation_id that can be used to continue the same conversation in future calls.
Example use cases
On-demand AI reasoning without a subscription
“Use Copilot in REASONING mode to explain the pros and cons of microservices vs monolith architecture for a startup, and give me the answer in markdown.”
GPT-5 powered writing assistance
“Use the SMART (GPT-5) mode to draft a compelling product description for a noise-cancelling headphone aimed at remote workers — return it in plain text.”
Multi-turn AI conversation continuation
“Continue my existing Copilot conversation (ID: abc-123) in normal CHAT mode and ask: 'Can you summarize what we discussed so far and suggest next steps?'”
Technical details
Endpoint
POSThttps://x402.openwebninja.com/copilot/copilotWhen to prefer
Choose this endpoint when you need on-demand access to AI chat (including GPT-5 and reasoning modes) without creating an account or holding an API key — just pay $0.005 USDC per call via x402 on Base, Polygon, or Arbitrum. Ideal for agents that need occasional LLM access in a permissionless, crypto-native context, or when you want to avoid subscription lock-in. Use over alternatives when multi-turn conversation continuity via conversation_id is needed alongside per-call micropayment.
Side effects
- Payment not processed or insufficient USDC balance — request rejected before AI response is generated
- Invalid mode value (not CHAT, REASONING, or SMART) — likely returns an error or unexpected behavior
- Upstream Copilot/GPT-5 service unavailable — may return 5xx or timeout
- Conversation ID not found or expired — may start a new conversation instead of continuing
- Message too long or malformed — upstream model may reject or truncate
Input
Schema · Request body
| Field | Type | Description |
|---|---|---|
| mode | array | Use normal chat mode (i.e. CHAT), reasoning mode (i.e. REASONING), or GPT-5 (SMART). |
| message | array | Message to send to Copilot. |
| markdown | array | Whether to return the Copilot response message in markdown format. By default, the bot reply is in plain text. |
| conversation_id | array | Conversation id. In case not supplied, a new conversation will be created and conversation_id will be returned by the endpoint. |
Output
Schema · Response
{
"type": "json",
"example": {}
}Tags
x402
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