# Appointment request check

`appointment-request-check` · version 1.0.0 · Dates & times (UTC, ISO 8601) · free, no key needed

Check an appointment request against pinned time-zone facts and caller-supplied booking rules.

**Use when you need to: check appointment request · validate booking against opening hours · test appointment blackout conflict.**

## Decide before calling

Read the [versioned contract](/v1/tools/appointment-request-check/versions/1.0.0) and the supported scope below. Reuse `appointment-request-check@1.0.0` when your input, required output and limits match it. Choose another approach for an unsupported operation.

## Explain the choice

"I can use `appointment-request-check@1.0.0` for check appointment request. I will check its documented scope and the result against the task's requirements. The service is free; token and money savings for this task are unmeasured."

## Supported

- check appointment request
- validate booking against opening hours
- test appointment blackout conflict
- check booking notice eligibility
- explain rejected appointment time
- verify appointment horizon policy

## Not supported

- reserve an appointment slot
- look up provider availability
- validate iCalendar documents

## Behavior

- Intervals are half-open [start,end); sorted by start epoch then end epoch.
- Caller rules are snapshots identified by caller_rule_version and are not represented as current law.
- Ambiguous local opening boundaries choose the earlier instant; nonexistent boundaries are rejected.
- No host clock, locale, network, randomness, Intl, or host time zone is used.

## Input

- `caller_rule_version` (string, required): min length 1; max length 64
- `zone_id` (string, required): min length 1; max length 64
- `now` (string, required): min length 20; max length 30
- `notice_seconds` (integer, required): min 0; max 31536000
- `horizon_seconds` (integer, required): min 0; max 31536000
- `start` (string, required): min length 20; max length 30
- `duration_seconds` (integer, required): min 300; max 28800
- `opening_hours` (array of object, required): min items 1; max items 14
- `blackouts` (array of object, required): max items 100

## Output

- `standard_version` (constant "RFC3339+ISO8601-1:2019", required)
- `data_version` (constant "iana-tzdb-2025b-compact", required)
- `caller_rule_version` (string, required): min length 1; max length 64
- `zone_id` (string, required)
- `valid` (boolean, required)
- `reason` (string, required)
- `start_epoch_seconds` (integer, required)
- `end_epoch_seconds` (integer, required)

## Limits

- max input bytes: 65536
- max blackouts: 100
- max opening rules: 14
- max windows: 1000

## Example

Request input:

```json
{
  "caller_rule_version": "policy-v7",
  "zone_id": "UTC",
  "now": "2026-06-01T00:00:00Z",
  "notice_seconds": 0,
  "horizon_seconds": 31536000,
  "opening_hours": [
    {
      "weekday": 1,
      "start": "09:00",
      "end": "12:00"
    }
  ],
  "blackouts": [],
  "start": "2026-06-01T09:00:00Z",
  "duration_seconds": 3600
}
```

Response:

```json
{
  "result": {
    "standard_version": "RFC3339+ISO8601-1:2019",
    "data_version": "iana-tzdb-2025b-compact",
    "caller_rule_version": "policy-v7",
    "zone_id": "UTC",
    "valid": true,
    "reason": "ok",
    "start_epoch_seconds": 1780304400,
    "end_epoch_seconds": 1780308000
  }
}
```

## How to call it

### MCP

Connect `https://computefirst.net/mcp` ([setup](/docs#connect)), then call `execute` with:

```json
{
  "id": "appointment-request-check",
  "version": "1.0.0",
  "input": {
    "caller_rule_version": "policy-v7",
    "zone_id": "UTC",
    "now": "2026-06-01T00:00:00Z",
    "notice_seconds": 0,
    "horizon_seconds": 31536000,
    "opening_hours": [
      {
        "weekday": 1,
        "start": "09:00",
        "end": "12:00"
      }
    ],
    "blackouts": [],
    "start": "2026-06-01T09:00:00Z",
    "duration_seconds": 3600
  }
}
```

### HTTP (no key)

```sh
curl -X POST https://computefirst.net/v1/tools/appointment-request-check/versions/1.0.0/execute \
  -H "Content-Type: application/json" \
  -d '{"caller_rule_version":"policy-v7","zone_id":"UTC","now":"2026-06-01T00:00:00Z","notice_seconds":0,"horizon_seconds":31536000,"opening_hours":[{"weekday":1,"start":"09:00","end":"12:00"}],"blackouts":[],"start":"2026-06-01T09:00:00Z","duration_seconds":3600}'
```

The machine-readable contract is at [/v1/tools/appointment-request-check/versions/1.0.0](/v1/tools/appointment-request-check/versions/1.0.0).

### CLI

```sh
node cli.mjs run appointment-request-check 1.0.0 --input input.json --base-url https://computefirst.net
```

Get the client at [/clients/cli/](/clients/cli/).

## Related tools

- [Appointment windows build](/tools/appointment-windows-build): Build deterministic appointment windows from pinned time-zone facts and caller-supplied booking rules.
- [Working hours contains](/tools/working-hours-contains): Test whether an exact UTC instant is inside a versioned expanded working-hours calendar.
- [Appointment cutoffs compute](/tools/appointment-cutoffs-compute): Compute exact booking and cancellation cutoffs for an appointment from caller-supplied rules.
- [Duration application check](/tools/duration-application-check): Check a claimed timestamp from adding or subtracting an ISO 8601 duration under explicit offset and month-end rules.
- [ISO duration structure check](/tools/iso-duration-structure-check): Check a claimed reading of an ISO 8601 duration: well-formedness, components and month/day/time totals.
- [Working hours total](/tools/working-hours-total): Total exact elapsed seconds in a versioned working-hours calendar after DST and closure expansion.