# Meeting Availability Intersection

> Meeting Availability Intersection is a paid API for AI agents from schedule-tools.use.x402atlas.com, paid per call via x402, $0.005/call, status unknown (last checked 2026-09-14).

Finds the maximal common free time slots across multiple participant calendars within a bounded time window.

## Facts

- Endpoint: POST https://schedule-tools.use.x402atlas.com/availability-intersect
- Price: $0.005/call
- Payment: x402
- Status: unknown
- Last checked: 2026-09-14
- Activations on Zero: 0
- Tags: x402
- Canonical page: https://www.zero.xyz/c/meeting-availability-intersection-9dc2c510
- Structured record (JSON): https://api.zero.xyz/v1/capabilities/cap_yWOGq1qxHvk0ihqKTxMQN

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 meeting-availability-intersection-9dc2c510 -d '<json body>'
```

Example prompt: I need to schedule a 1-hour meeting with Alice, Bob, and Carol sometime between Monday 9am and Friday 6pm — can you find all the times when everyone is free given their busy slots?

## When to prefer this

Use this endpoint when you need to compute the intersection of free time across multiple participants' calendars to find meeting windows. It is specifically optimized for finding maximal common availability rather than just merging or converting intervals. Prefer it over generic scheduling APIs when you already have structured free/busy data and need a pure computational result with no side effects.

## Known failure modes

- No overlapping free slots found — returns empty result set
- Malformed or non-RFC 3339 date-time inputs cause validation error
- Unbounded or excessively large time windows may be rejected
- Conflicting or overlapping busy blocks within a single participant's calendar
- Missing required fields such as participant availability lists or window bounds

## How this service works

Meeting availability intersection — find maximal common free time slots across participant calendars within a bounded window.

## Output

A list of time intervals representing the maximal common free windows where all participants are simultaneously available, expressed as RFC 3339 date-time ranges, within the bounded search window.

## More

- Live health (JSON, refreshed every minute): https://www.zero.xyz/c/meeting-availability-intersection-9dc2c510/health.json
- [Zero catalog index](https://www.zero.xyz/llms.txt)
- [Other services from schedule-tools.use.x402atlas.com](https://www.zero.xyz/host/schedule-tools.use.x402atlas.com/llms.txt)