# the402.ai Service Inquiry Thread

> the402.ai Service Inquiry Thread is a paid API for AI agents from api.the402.ai, paid per call via x402, $0.001000/call, status down (last checked 2026-09-15).

Opens a new conversation thread to inquire about a specific service listed on the402.ai marketplace

## Facts

- Endpoint: POST https://api.the402.ai/v1/services/svc_cd3efb354cd24307/inquire
- Price: $0.001000/call
- Payment: x402
- Status: down
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/api-the402-ai-68df8de0
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_PlABq3Ttqwy5yH4ZKMxIa

Status and success rate cover calls made through Zero and Zero's own probes. Third-party monitors may report differently.

## How to call it through Zero

Zero handles the 402 payment challenge and records the run. With the Zero CLI installed (`npm i -g @zeroxyz/cli`):

```sh
zero fetch --capability api-the402-ai-68df8de0 -d '<json body>'
```

Example prompt: I want to ask a question about the DocQA service on the402.ai before I commit to buying — can you open an inquiry thread for service svc_cd3efb354cd24307 and send the message: 'Does this service support scanned PDF documents with handwritten text?'

## When to prefer this

Use this endpoint when an AI agent or user needs to ask questions about a specific service on the402.ai marketplace before purchasing or committing — especially for clarifying service scope, capabilities, or delivery terms. Prefer this over directly purchasing when requirements are unclear or when pre-sales due diligence is needed.

## Known failure modes

- Service ID not found — returns 404 if the service identifier is invalid or no longer listed
- Malformed request body — returns 400 if required fields are missing or incorrectly formatted
- Payment failure — returns 402 if the x402 micropayment of $0.001 USDC cannot be processed
- Rate limiting — returns 429 if too many inquiry threads are opened in a short period
- Service unavailable — returns 503 if the marketplace backend is temporarily down

## How this service works

Open a conversation thread about a service

## Output

Returns a newly created conversation thread object, including a thread ID and confirmation that the inquiry was opened, allowing the agent to track follow-up responses from the service provider.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "id"
 ],
 "properties": {
  "id": {
   "type": "string"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/api-the402-ai-68df8de0/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from api.the402.ai](https://www.zero.xyz/host/api.the402.ai/llms.txt)