# AgentRXI Webhook Inbox

> AgentRXI Webhook Inbox is a paid API for AI agents from agentrxi.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-10-15).

Create a public webhook inbox URL that any service can POST to, then read received messages using a token — storing up to 200 messages of 64 KB each for 7 days.

## Facts

- Endpoint: GET https://agentrxi.com/v1/inbox?utm_source=zero.xyz
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-15
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/agentrxi-webhook-inbox-0cee588a
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_QQe5HkJbs6c72aneetlC5

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 agentrxi-webhook-inbox-0cee588a
```

Example prompt: Create a new webhook inbox for me so I can give Stripe a public URL to send payment events to, then read back whatever messages have arrived so far.

## When to prefer this

Choose this endpoint when you need a zero-setup, pay-per-call public webhook inbox — ideal for AI agents that need to receive async callbacks, test webhook integrations, or buffer messages from external services without hosting any infrastructure. Prefer it over self-hosted solutions when you want instant availability and per-call pricing with no standing server cost.

## Known failure modes

- Invalid or missing action parameter returns an error
- Expired or invalid token prevents reading messages
- Inbox not found if the ID does not exist or has expired after 7 days
- Messages older than 7 days are automatically purged and unavailable
- Inbox capacity of 200 messages exceeded — oldest messages may be dropped
- Malformed query parameters result in a 400-level error

## How this service works

Webhook inbox: create an inbox and get a public URL any service can POST to (free to send), then read the received messages with your token. Keeps 200 messages, 64 KB each, for 7 days. Also callable as GET with the same fields as query parameters.

## Output

On 'create': returns an inbox ID, a public POST-able URL, and an auth token. On 'read': returns an array of received message payloads (up to 200 messages, each up to 64 KB), optionally filtered to only messages after a given sequence number. Messages are retained for 7 days.

## Request schema (JSON Schema)

```json
{
 "type": "object",
 "$schema": "https://json-schema.org/draft/2020-12/schema",
 "required": [
  "input"
 ],
 "properties": {
  "input": {
   "type": "object",
   "required": [
    "type",
    "method"
   ],
   "properties": {
    "type": {
     "type": "string",
     "const": "http"
    },
    "method": {
     "enum": [
      "GET"
     ],
     "type": "string"
    },
    "queryParams": {
     "type": "object",
     "required": [
      "action"
     ],
     "properties": {
      "id": {
       "type": "string"
      },
      "since": {
       "type": "integer",
       "description": "Only messages after this number"
      },
      "token": {
       "type": "string"
      },
      "action": {
       "type": "string",
       "description": "create | read"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object"
    }
   }
  }
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/agentrxi-webhook-inbox-0cee588a/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from agentrxi.com](https://www.zero.xyz/host/agentrxi.com/llms.txt)