# FastX402 Lab – ICS Calendar Invite Generator

> FastX402 Lab – ICS Calendar Invite Generator is a paid API for AI agents from fastx402.tools, paid per call via x402, $0.001/call, status unknown (last checked 2026-10-18).

Generates a downloadable iCalendar (.ics) file for a calendar event, compatible with Google Calendar, Outlook, and Apple Calendar.

## Facts

- Endpoint: GET https://fastx402.tools/ics-event?utm_source=zero.xyz
- Price: $0.001/call
- Payment: x402
- Status: unknown
- Last checked: 2026-10-18
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/fastx402-lab-ics-calendar-invite-generator-151d49b8
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yEqTfQZZ2P7NeTTslaq-f

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 fastx402-lab-ics-calendar-invite-generator-151d49b8
```

Example prompt: Create a calendar invite for a team standup called 'Weekly Sync' on October 20, 2026 at 9:00 AM UTC, lasting 30 minutes, at https://meet.example.com/standup, and give me the .ics file I can send out.

## When to prefer this

Use this endpoint when an AI agent needs to programmatically create a standard calendar invite file that users can import into any major calendar app. It is the right choice when you need a portable, universally compatible .ics file rather than using a calendar provider's proprietary API (which would require OAuth and user credentials). Ideal for agent-initiated scheduling flows, email attachments, or event reminders without requiring access to the recipient's calendar system.

## Known failure modes

- Missing required 'title' or 'start' parameters returns an error
- Malformed UTC datetime format (non-ISO 8601) may result in an invalid event
- Payment failure (x402) prevents the call from completing
- Invalid duration_minutes value (non-numeric) may be ignored or cause an error

## How this service works

200 pay-per-call tools for AI agents, from $0.001 per request in USDC on Base or Solana with x402. No account, no API key.

## Output

Returns a JSON object containing: the full iCalendar (.ics) text (VCALENDAR block), a base64-encoded data URI suitable for embedding in HTML or email attachments, and a suggested filename (e.g. 'event-title.ics'). The .ics content is compatible with Google Calendar, Microsoft Outlook, and Apple Calendar.

## 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": [
      "title",
      "start"
     ],
     "properties": {
      "url": {
       "type": "string",
       "description": "Link, e.g. a meeting URL (optional)"
      },
      "start": {
       "type": "string",
       "description": "Start in UTC, e.g. 2026-10-20T09:00:00Z"
      },
      "title": {
       "type": "string",
       "description": "Event title"
      },
      "location": {
       "type": "string",
       "description": "Where (optional)"
      },
      "description": {
       "type": "string",
       "description": "Details (optional)"
      },
      "duration_minutes": {
       "type": "string",
       "description": "Length in minutes (default 60)"
      }
     }
    }
   },
   "additionalProperties": false
  },
  "output": {
   "type": "object",
   "required": [
    "type"
   ],
   "properties": {
    "type": {
     "type": "string"
    },
    "example": {
     "type": "object",
     "properties": {
      "ics": {
       "type": "string"
      },
      "data_uri": {
       "type": "string"
      },
      "filename": {
       "type": "string"
      }
     }
    }
   }
  }
 }
}
```

## Response schema (JSON Schema)

```json
{
 "type": "json",
 "example": {
  "ics": "BEGIN:VCALENDAR\r\nVERSION:2.0\r\nCALSCALE:GREGORIAN\r\nPRODID:fastx402.tools\r\nMETHOD:PUBLISH\r\nX-PUBLISHED-TTL:PT1H\r\nBEGIN:VEVENT\r\nUID:fastx402-demo-1792486800000@fastx402.tools\r\nSUMMARY:FastX402 demo\r\nDTSTAMP:20261020T090000Z\r\nDTSTART:20261020T090000Z\r\nURL:https://fastx402.tools\r\nLOCATION:Online\r\nDURATION:PT45M\r\nEND:VEVENT\r\nEND:VCALENDAR\r\n",
  "data_uri": "data:text/calendar;charset=utf-8;base64,QkVHSU46VkNBTEVOREFSDQpWRVJTSU9OOjIuMA0KQ0FMU0NBTEU6R1JFR09SSUFODQpQUk9ESUQ6ZmFzdHg0MDIudG9vbHMNCk1FVEhPRDpQVUJMSVNIDQpYLVBVQkxJU0hFRC1UVEw6UFQxSA0KQkVHSU46VkVWRU5UDQpVSUQ6ZmFzdHg0MDItZGVtby0xNzkyNDg2ODAwMDAwQGZhc3R4NDAyLnRvb2xzDQpTVU1NQVJZOkZhc3RYNDAyIGRlbW8NCkRUU1RBTVA6MjAyNjEwMjBUMDkwMDAwWg0KRFRTVEFSVDoyMDI2MTAyMFQwOTAwMDBaDQpVUkw6aHR0cHM6Ly9mYXN0eDQwMi50b29scw0KTE9DQVRJT046T25saW5lDQpEVVJBVElPTjpQVDQ1TQ0KRU5EOlZFVkVOVA0KRU5EOlZDQUxFTkRBUg0K",
  "filename": "fastx402-demo.ics"
 }
}
```

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/fastx402-lab-ics-calendar-invite-generator-151d49b8/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from fastx402.tools](https://www.zero.xyz/host/fastx402.tools/llms.txt)