Connects an iCloud or Fastmail calendar to browse events, read ICS, sync changes and write events by version.
What you can do (8)
What you can do
Available commands: 8 (6 read, 2 write). Enable only the commands your application needs.
| Command | Effect |
|---|---|
Browse calendars — caldav.calendars |
Read |
Browse events — caldav.events |
Read |
Read event ICS — caldav.event.get |
Read |
Read calendar changes — caldav.sync |
Read |
Save event by version — caldav.event.put |
Write |
Read the current sync cursor — caldav.sync-token |
Read |
Read the calendar collection version — caldav.ctag |
Read |
Delete an event by version — caldav.event.delete |
Write |
Connect and use
Open the integration's connection form to check the available credential source. The source has not been resolved for this documentation export. The instructions below apply when using your own provider account.
Get your provider credentials
Follow these steps for CalDAV calendar, then enter the issued values in the connection form below.
- Open your mail, calendar or file provider's security settings and create an app password when supported. Obtain the server URL and account identifiers from its CalDAV, CardDAV or WebDAV setup guide; enter those values in the connection form.
Where to enter credentials
In the integration page, sign in, choose your workspace and open Connect. If a Credentials choice is shown, select Use my credentials. Fill the following connection fields and save. Provider credentials belong in this form, never in an MCP configuration or tool input.
| Connection field | Requirement |
|---|---|
| Provider | Required |
| Account | Required |
| App-specific password | Required |
Open API keys and create a Tooluse.net key for the enabled commands.
Set TOOLUSE_API_KEY in your client and use the shared MCP configuration.
Configure Claude Code, Codex or Cursor once
Permissions and results
If you have more than one workspace, check the selected workspace in the connection or API-key dialog before saving. Roles, enabled commands, expiry and revocation use Tooluse.net's existing permissions. Disabling a connection or revoking a key immediately prevents new calls.
Send one Claude tool_use block per request. Keep the same Idempotency-Key when retrying the same request; use a new key for a new call. The response includes the shared Tooluse.net receipt and Claude tool_result. Check both HTTP status and the returned tool result before treating a call as successful.
Your connection's daily allowance and key permissions also apply. Adding a connection does not make a provider request.
Calls return the shared execution receipt and a Claude tool_result. Provider output varies by operation; consult the provider documentation for its response fields. Unconfirmed calls should be checked before retrying.
Call from your client
Use the shared MCP configuration. Refresh your client's tool list after saving the connection or changing key permissions, then call the returned tool name with the example input below.
Configure Claude Code, Codex or Cursor once
Discover your enabled tools
List permitted tools in Claude format. Read every page using page and size (maximum 100) until all results have been received. Use the returned name, not a catalog capability identifier, in the tool_use block.
curl 'https://api.tooluse.net/v1/tools' \
-H "Authorization: Bearer $TOOLUSE_API_KEY"
Find this command in the tool list permitted by your key. Replace svc_FROM_YOUR_TOOL_LIST with its returned name. Use a new Idempotency-Key for each new call and retain it when retrying that same call.
HTTP call
curl 'https://api.tooluse.net/v1/tool-calls' \
-H "Authorization: Bearer $TOOLUSE_API_KEY" \
-H 'Content-Type: application/json' \
-H 'Idempotency-Key: replace-with-a-new-call-id' \
--data '{
"type": "tool_use",
"id": "toolu_example",
"name": "svc_FROM_YOUR_TOOL_LIST",
"input": {}
}'
Send one Claude tool_use block per request. Keep the same Idempotency-Key when retrying the same request; use a new key for a new call. The response includes the shared Tooluse.net receipt and Claude tool_result. Check both HTTP status and the returned tool result before treating a call as successful.
Commands
Browse calendars — caldav.calendars
Run Browse calendars with CalDAV calendar. This is a read command; it does not grant access beyond the connected account's permissions.
This is a read operation. Provider rate limits and data access rules still apply.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
This tool has no input parameters.
Full JSON Schema
Example input
{}
At most 3 provider requests per invocation; timeout: 30 seconds.
Browse events — caldav.events
Run Browse events with CalDAV calendar. This is a read command; it does not grant access beyond the connected account's permissions.
This is a read operation. Provider rate limits and data access rules still apply.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/"
}
At most 10 provider requests per invocation; timeout: 30 seconds.
Read event ICS — caldav.event.get
Run Read event ICS with CalDAV calendar. This is a read command; it does not grant access beyond the connected account's permissions.
This is a read operation. Provider rate limits and data access rules still apply.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/event.ics"
}
At most 1 provider requests per invocation; timeout: 30 seconds.
Read calendar changes — caldav.sync
Run Read calendar changes with CalDAV calendar. This is a read command; it does not grant access beyond the connected account's permissions.
This is a read operation. Provider rate limits and data access rules still apply.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
syncToken |
string | Required | Sync cursor | minLength: 1; maxLength: 2000 |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/",
"syncToken": "previous-token"
}
At most 1 provider requests per invocation; timeout: 30 seconds.
Save event by version — caldav.event.put
Run Save event by version with CalDAV calendar. This command can change provider data. Review the target and input before invoking it.
This operation can change provider data. Review the input before allowing an agent to call it.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
ics |
string | Required | Event ICS | minLength: 1; maxLength: 64000 |
etag |
string | Required | Expected version ETag; use * when creating | minLength: 1; maxLength: 2000 |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/event.ics",
"ics": "BEGIN:VCALENDAR\nVERSION:2.0\nEND:VCALENDAR",
"etag": "*"
}
At most 1 provider requests per invocation; timeout: 30 seconds.
Read the current sync cursor — caldav.sync-token
Run Read the current sync cursor with CalDAV calendar. This is a read command; it does not grant access beyond the connected account's permissions.
This is a read operation. Provider rate limits and data access rules still apply.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/"
}
At most 1 provider requests per invocation; timeout: 30 seconds.
Read the calendar collection version — caldav.ctag
Run Read the calendar collection version with CalDAV calendar. This is a read command; it does not grant access beyond the connected account's permissions.
This is a read operation. Provider rate limits and data access rules still apply.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/"
}
At most 1 provider requests per invocation; timeout: 30 seconds.
Delete an event by version — caldav.event.delete
Run Delete an event by version with CalDAV calendar. This command can change provider data. Review the target and input before invoking it.
This operation can change provider data. Review the input before allowing an agent to call it.
Parameters
Requiredness is local to the containing object. A required child is required only when its parent object or array item is provided. Alternative schemas are identified in the Constraints column; the linked full JSON Schema is authoritative.
| Parameter | Type | Required in parent | Description | Constraints |
|---|---|---|---|---|
href |
string | Required | Resource URL | minLength: 1; maxLength: 2000; format: "uri" |
etag |
string | Required | Expected version ETag | minLength: 1; maxLength: 2000 |
Full JSON Schema
Example input
{
"href": "https://caldav.icloud.com/calendar/event.ics",
"etag": "\"current-version\""
}
At most 1 provider requests per invocation; timeout: 30 seconds.
Errors
Check the key's expiry, revocation, workspace and allowed operations.
Reuse the same idempotency key only for the same request.
The connection or provider limit has been reached. Check the receipt before retrying.
Test the connection
Open the integration's commands below to inspect parameters and examples. Start with a read command for an account or resource you can access. Refresh your client's tool list, use the returned tool name, and check the execution result and usage. Provider charges and permissions still apply. Never test a write against production data without reviewing it.