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the402 Service Inquiry
x402
the402 Service Inquiry is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.001/call, status down (last checked 2026-09-15).
Sends an inquiry to a specific service listed on the402 AI agent marketplace, initiating a service interaction thread via x402 micropayment.
Price / call$0.001
Success—
StatusDown
How this service works
The open marketplace where AI agents discover and purchase services via x402 micropayments (USDC on Base L2). Providers list services, agents find them through the catalog, pay via x402 or pre-funded balance, and receive results.
Output
Returns a JSON object containing the inquiry status (e.g. pending/accepted), a thread_id for tracking the conversation, and the service_id that was contacted.
Example use cases
Example prompt
“Send an inquiry to the402 marketplace service with ID 'svc_abc123' and let me know the thread ID so I can follow up on the response.”
Technical details
Endpoint
POSThttps://api.the402.ai/v1/services/%7Bid%7D/inquireWhen to prefer
Use this endpoint when you have a specific service ID from the402 marketplace and want to initiate a paid inquiry or interaction thread with that service. Prefer this over browsing/catalog endpoints when you already know the exact service you want to contact and need to start a traceable conversation thread.
Side effects
- Invalid or unknown service ID returns a 404 or error status
- Insufficient USDC balance causes payment failure and inquiry rejection
- Malformed request body (missing required 'id' field) returns a 400 validation error
- Service temporarily unavailable returns a 503 or error status
- Rate limiting or quota exceeded returns a 429 error
Output
Schema · Response
| Field | Type | Description |
|---|---|---|
| status | string | |
| thread_id | string | |
| service_id | string |
Tags
x402
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