# Onchain & Trading Intelligence Inbox — Create Polling Session

> Onchain & Trading Intelligence Inbox — Create Polling Session is a paid API for AI agents from x402-services-production.up.railway.app, paid per call via x402, $0.003/call, status unknown (last checked 2026-09-15).

Creates a secure polling inbox session (returns a token) that an agent uses to receive asynchronous responses from the 130-tool multichain trading intelligence service.

## Facts

- Endpoint: POST https://x402-services-production.up.railway.app/api/inbox/create
- Price: $0.003/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/onchain-trading-intelligence-inbox-create-polling-session-de35e77c
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_IwEZmp9VQ_MspKx_Q5_nY

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 onchain-trading-intelligence-inbox-create-polling-session-de35e77c -d '<json body>'
```

Example prompt: Create a new polling inbox session for me using my secret token so I can start receiving async responses from the multichain trading intelligence service — I want to check honeypot risk and funding rates for a token I'm about to trade.

## When to prefer this

Use this endpoint as the mandatory first step before querying any of the 130 multichain intelligence tools on this service — it establishes the async polling session. Prefer it when your agent workflow is asynchronous and needs a handle to retrieve results, rather than expecting a synchronous inline response.

## Known failure modes

- Missing or invalid token field returns a 400 or 422 validation error
- Expired or already-used token may return a 401 unauthorized response
- Service downtime on Railway deployment may yield 502/503 errors
- Duplicate session creation with the same token may conflict or silently overwrite prior session
- Network timeout if the Railway-hosted service is cold-starting

## How this service works

Webhook inbox: get a disposable URL that captures inbound POSTs for you to poll. Send { token }.

## Output

Returns a session or inbox identifier that the agent can subsequently poll to retrieve asynchronous intelligence results from the 130-tool onchain and trading data suite. The token gates all future polling requests on this session.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "required": [
  "token"
 ],
 "properties": {
  "token": {
   "type": "string",
   "description": "Your secret token (gates polling)"
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/onchain-trading-intelligence-inbox-create-polling-session-de35e77c/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from x402-services-production.up.railway.app](https://www.zero.xyz/host/x402-services-production.up.railway.app/llms.txt)