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CalDAV calendars

Local package path declaredNo credentials listedRepository declared by sourceUpdated 2026-09-08

io.github.ni-c/caldav-mcp · Registry status: active

Report data on this entry

At a glance

Read and write CalDAV calendars: events, tasks and journal entries over the open standard

Vendor's own description, untranslated and unverified

Execution location
Local package path declaredMCP-Register · 2026-09-06
Required secrets declared
No credentials listedMCP-Register · 2026-09-06
Declared version and change
0.1.4 · Source-reported change date 2026-09-08MCP-Register · 2026-09-09
Repository as declared
github.com/ni-c/caldav-mcpMCP-Register · 2026-09-06
Configuration
can be built from the disclosed start template

Inspect connection paths and prerequisites

Related categories

6 of 7 categories. All categories in the segment catalogue

Page last changed:

Sources and collection
Runs
Local package path declared
Credentials
No credentials listed
Registry record changed
2026-09-08
Setup
Template available
Registry name
io.github.ni-c/caldav-mcp
Package coordinate
npm:@ni-c/caldav-mcp
Declared version
0.1.4
Source-reported listing date
2026-09-08
Source-reported change date
2026-09-08
First seen by tracevero
2026-09-06
Vendor's website
https://caldav-mcp.ni-c.de

Evidence for this page: The values on this page come from several collections. Each row therefore states its own origin. What the confidence levels mean

Measured values

Measured values
Required secrets declaredNo credentials listed no
Original data – Required secret variables (raw): confirmed absent
Original data – Required secret headers (raw): confirmed absent
Source: MCP-Register · collected on 2026-09-06 · derived
Execution locationLocal package path declared local
Original data – Transports (raw): stdio, stdio
Source: MCP-Register · collected on 2026-09-06 · derived
Path argument presentno
Original data – Path arguments (raw): confirmed absent
Original data – Path environment variables (raw): confirmed absent
Source: MCP-Register · collected on 2026-09-06 · derived
Repository URL listedRepository declared by source yes
Original data – Repository (raw): https://github.com/ni-c/caldav-mcp
Source: MCP-Register · collected on 2026-09-06 · derived
Field of use, derived from the vendor descriptionCalendars
Original data – Description (raw): Read and write CalDAV calendars: events, tasks and journal entries over the open standard
Source: MCP-Register · collected on 2026-09-06 · derived
Declared version0.1.4
Source: MCP-Register · collected on 2026-09-09 · self-declared

What is measured is what a manifest declares, not what a piece of software does. This registry fetches no repository URL, no endpoint and no package index; nothing here is verified. Which value comes from which source, and by which rule it was formed, is set out in the Methodology.

Source data25

Evidence for this page: The values on this page come from several collections. Each row therefore states its own origin.

Raw values
Description (raw)Read and write CalDAV calendars: events, tasks and journal entries over the open standard
Source: MCP-Register · collected on 2026-09-06 · self-declared
Environment variables (raw)CALDAV_URL, CALDAV_USERNAME, CALDAV_PASSWORD, CALDAV_TOKEN, CALDAV_CALENDARS, CALDAV_TIMEZONE, CALDAV_USER_EMAIL, CALDAV_MAX_EVENTS, CALDAV_READ_ONLY, CALDAV_INSECURE_TLS, CALDAV_ALLOW_PLAINTEXT, CALDAV_ALLOW_TOOLS, CALDAV_DENY_TOOLS, ELICITATION, CALDAV_URL, CALDAV_USERNAME, CALDAV_PASSWORD, CALDAV_TOKEN, CALDAV_CALENDARS, CALDAV_TIMEZONE, CALDAV_USER_EMAIL, CALDAV_MAX_EVENTS, CALDAV_READ_ONLY, CALDAV_INSECURE_TLS, CALDAV_ALLOW_PLAINTEXT, CALDAV_ALLOW_TOOLS, CALDAV_DENY_TOOLS, ELICITATION
Source: MCP-Register · collected on 2026-09-06 · self-declared
Required secret variables (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Transports (raw)stdio, stdio
Source: MCP-Register · collected on 2026-09-06 · self-declared
Path arguments (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Repository (raw)https://github.com/ni-c/caldav-mcp
Source: MCP-Register · collected on 2026-09-06 · self-declared
Package registries (raw)npm, oci
Source: MCP-Register · collected on 2026-09-06 · self-declared
Required secret headers (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Path environment variables (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Remote URLs (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Remote hosts (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Registry status message (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
First listed in the registry (raw)2026-09-08
Source: MCP-Register · collected on 2026-09-09 · self-declared
Last changed in the registry (raw)2026-09-08
Source: MCP-Register · collected on 2026-09-09 · self-declared
Schema version of the raw record (raw)https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json
Source: MCP-Register · collected on 2026-09-06 · self-declared
Delivery form (raw)package
Source: MCP-Register · collected on 2026-09-06 · self-declared
Repository platform (raw)github
Source: MCP-Register · collected on 2026-09-06 · self-declared
Repository subfolder (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Package identifiers (raw)@ni-c/caldav-mcp, ghcr.io/ni-c/caldav-mcp:0.1.4
Source: MCP-Register · collected on 2026-09-09 · self-declared
Package versions (raw)0.1.4
Source: MCP-Register · collected on 2026-09-09 · self-declared
Runtime hints (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Environment variable formats (raw)boolean, number, string
Source: MCP-Register · collected on 2026-09-06 · self-declared
Environment variable descriptions (raw)CALDAV_ALLOW_PLAINTEXT=Set to true to allow a plain http:// URL to a host that is not loopback, which sends the credentials unencrypted (default: false) · CALDAV_ALLOW_TOOLS=Comma-separated tool names or list_* prefixes to register; 'essential' selects a curated preset (default: all tools) · CALDAV_CALENDARS=Comma-separated calendars this server may touch, by path or final path segment. Default: all of them. · CALDAV_DENY_TOOLS=Comma-separated tool names or list_* prefixes to remove from whatever the allow list left · CALDAV_INSECURE_TLS=Set to true to accept a self-signed certificate on the configured host only (default: false) · CALDAV_MAX_EVENTS=Entries a listing returns by default, 1 to 500 (default: 100) · CALDAV_PASSWORD=Password or app-specific password. Deleted from the environment once read. · CALDAV_READ_ONLY=Set to true to register only the read tools (default: false) · CALDAV_TIMEZONE=IANA zone for timestamps that carry no offset, e.g. Europe/Berlin (default: UTC) · CALDAV_TOKEN=Bearer token, as an alternative to username and password. Not both. · CALDAV_URL=Root of the CalDAV server, e.g. https://dav.example.net. A calendar collection URL also works. · CALDAV_USERNAME=Account name. Most hosted services want an app-specific password with it. · CALDAV_USER_EMAIL=The address you are invited as, so respond_to_event can find your own attendee line · ELICITATION=Deliberately unprefixed, and reaches every MCP server in the environment. Set to false to make guarded tools use the two-call token instead of a dialog (default: true)
Source: MCP-Register · collected on 2026-09-06 · self-declared
Icon formats (raw)confirmed absent
Source: MCP-Register · collected on 2026-09-06 · self-declared
Connection paths (source structure){"packages":[{"registryType":"npm","identifier":"@ni-c/caldav-mcp","version":"0.1.4","transport":"stdio","environment":[{"name":"CALDAV_URL","description":"Root of the CalDAV server, e.g. https://dav.example.net. A calendar collection URL also works.","format":"string","required":true,"secret":false},{"name":"CALDAV_USERNAME","description":"Account name. Most hosted services want an app-specific password with it.","format":"string","required":false,"secret":false},{"name":"CALDAV_PASSWORD","description":"Password or app-specific password. Deleted from the environment once read.","format":"string","required":false,"secret":true},{"name":"CALDAV_TOKEN","description":"Bearer token, as an alternative to username and password. Not both.","format":"string","required":false,"secret":true},{"name":"CALDAV_CALENDARS","description":"Comma-separated calendars this server may touch, by path or final path segment. Default: all of them.","format":"string","required":false,"secret":false},{"name":"CALDAV_TIMEZONE","description":"IANA zone for timestamps that carry no offset, e.g. Europe/Berlin (default: UTC)","format":"string","required":false,"secret":false},{"name":"CALDAV_USER_EMAIL","description":"The address you are invited as, so respond_to_event can find your own attendee line","format":"string","required":false,"secret":false},{"name":"CALDAV_MAX_EVENTS","description":"Entries a listing returns by default, 1 to 500 (default: 100)","format":"number","required":false,"secret":false},{"name":"CALDAV_READ_ONLY","description":"Set to true to register only the read tools (default: false)","format":"boolean","required":false,"secret":false},{"name":"CALDAV_INSECURE_TLS","description":"Set to true to accept a self-signed certificate on the configured host only (default: false)","format":"boolean","required":false,"secret":false},{"name":"CALDAV_ALLOW_PLAINTEXT","description":"Set to true to allow a plain http:// URL to a host that is not loopback, which sends the credentials unencrypted (default: false)","format":"boolean","required":false,"secret":false},{"name":"CALDAV_ALLOW_TOOLS","description":"Comma-separated tool names or list_* prefixes to register; 'essential' selects a curated preset (default: all tools)","format":"string","required":false,"secret":false},{"name":"CALDAV_DENY_TOOLS","description":"Comma-separated tool names or list_* prefixes to remove from whatever the allow list left","format":"string","required":false,"secret":false},{"name":"ELICITATION","description":"Deliberately unprefixed, and reaches every MCP server in the environment. Set to false to make guarded tools use the two-call token instead of a dialog (default: true)","format":"boolean","required":false,"secret":false}],"additional_arguments_declared":false},{"registryType":"oci","identifier":"ghcr.io/ni-c/caldav-mcp:0.1.4","transport":"stdio","environment":[{"name":"CALDAV_URL","description":"Root of the CalDAV server, e.g. https://dav.example.net. A calendar collection URL also works.","format":"string","required":true,"secret":false},{"name":"CALDAV_USERNAME","description":"Account name. Most hosted services want an app-specific password with it.","format":"string","required":false,"secret":false},{"name":"CALDAV_PASSWORD","description":"Password or app-specific password. Deleted from the environment once read.","format":"string","required":false,"secret":true},{"name":"CALDAV_TOKEN","description":"Bearer token, as an alternative to username and password. Not both.","format":"string","required":false,"secret":true},{"name":"CALDAV_CALENDARS","description":"Comma-separated calendars this server may touch, by path or final path segment. Default: all of them.","format":"string","required":false,"secret":false},{"name":"CALDAV_TIMEZONE","description":"IANA zone for timestamps that carry no offset, e.g. Europe/Berlin (default: UTC)","format":"string","required":false,"secret":false},{"name":"CALDAV_USER_EMAIL","description":"The address you are invited as, so respond_to_event can find your own attendee line","format":"string","required":false,"secret":false},{"name":"CALDAV_MAX_EVENTS","description":"Entries a listing returns by default, 1 to 500 (default: 100)","format":"number","required":false,"secret":false},{"name":"CALDAV_READ_ONLY","description":"Set to true to register only the read tools (default: false)","format":"boolean","required":false,"secret":false},{"name":"CALDAV_INSECURE_TLS","description":"Set to true to accept a self-signed certificate on the configured host only (default: false)","format":"boolean","required":false,"secret":false},{"name":"CALDAV_ALLOW_PLAINTEXT","description":"Set to true to allow a plain http:// URL to a host that is not loopback, which sends the credentials unencrypted (default: false)","format":"boolean","required":false,"secret":false},{"name":"CALDAV_ALLOW_TOOLS","description":"Comma-separated tool names or list_* prefixes to register; 'essential' selects a curated preset (default: all tools)","format":"string","required":false,"secret":false},{"name":"CALDAV_DENY_TOOLS","description":"Comma-separated tool names or list_* prefixes to remove from whatever the allow list left","format":"string","required":false,"secret":false},{"name":"ELICITATION","description":"Deliberately unprefixed, and reaches every MCP server in the environment. Set to false to make guarded tools use the two-call token instead of a dialog (default: true)","format":"boolean","required":false,"secret":false}],"additional_arguments_declared":false}],"remotes":[]}
Source: MCP-Register · collected on 2026-09-09 · self-declared
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Changes

Changes
2026-09-09Declared version: 0.1.3 → 0.1.4
2026-09-09Last changed in the registry (raw): 2026-09-07 → 2026-09-08
2026-09-09First listed in the registry (raw): 2026-09-07 → 2026-09-08

These are the 3 most recent changes to this entry. Full history

tracevero · https://tracevero.com/mcp/io-github-ni-c-caldav-mcp