Reference for all @MythOS MCP server capabilities. Endpoint: https://mythos.one/api/mcp. Auth: OAuth 2.0 (Claude connectors) or x-mythos-key header (Claude Code, npm package).

get_context (read-only, idempotent) — Start Here

Load the user's formatting rules, collaboration values, and personal context from their @Augmentation System. Returns the full content of all four augmentation memos: Mythos Soul, Mythos Style, Mythos Human, and Mythos Memory. Must be called before create_memo or update_memo so the AI has the user's style rules in context before composing content. Any memo tagged #mythos-augmentation with an augmentationType field is included. No parameters.

Tools (19)

search_memos (read-only, idempotent)

Search memos by query, tags, or visibility. Owner sees all visibilities including private.

• query — search query to match memo titles
• tags — comma-separated tags to filter by
• visibility — filter: public, unlisted, private (default: all for owner)
• fields — comma-separated: title, snippet, tags, content, header, visibility, author
• limit — max results (default 50, max 200)

read_memo (read-only, idempotent)

Read full content of a specific memo by ID. Includes notes and headerVisibility.

• memoId (required) — the memo ID
• section — optional section heading to extract
• Returns: content, notes (the notes section below the body), headerVisibility, tags, visibility, author

create_memo (write) — Requires get_context first

Create a new memo in the library.

• title (required) — memo title
• content — markdown content for the main body. Must use Objective/Subjective/Contexts template structure. Never duplicate the title as a heading in the body. No extra blank lines between sections
• notes — notes section content (displayed separately below the main body). Always populate with relevant notes and tags
• tags — array of tags. Use existing tags before creating new ones
• visibility — public, link, or private (default: link)
• headerVisibility — object mapping lowercase header names to booleans. Default for new memos: {"objective": false, "subjective": false, "contexts": true}. Objective and Subjective should always be hidden

update_memo (write, idempotent) — Requires get_context first

Update content of an existing memo.

• memoId (required) — memo ID to update
• content (required) — new markdown content for the main body. Must follow user's Mythos Style rules
• tags — updated tags array. Use existing tags before creating new ones
• notes — updated notes section content. Always populate with relevant notes and tags
• headerVisibility — updated header visibility map. Objective and Subjective should always be hidden (false)

delete_memo (destructive, idempotent)

Move a memo to the trash (soft delete — can be restored from trash).

• memoId (required) — the memo ID to delete

list_tags (read-only, idempotent)

List all hashtags across the library with usage counts. No parameters.

chat_with_library (read-only)

Ask a question answered by RAG over the knowledge base.

• username (required) — library owner's username
• message (required) — the question to ask
• threadId — optional thread ID to continue a conversation

delta_sync (read-only, idempotent)

Get memos changed since a given timestamp.

• since (required) — ISO 8601 timestamp
• limit — max results

get_memo_index (read-only, idempotent)

Lightweight index of all memos — titles, tags, content hashes. No content bodies. No parameters.

list_communities (read-only, idempotent)

List public communities with names, descriptions, member counts.

• limit — max results (default 50, max 100)

search_community_posts (read-only, idempotent)

Search approved posts in a community.

• communitySlug (required) — community URL slug
• query — search query
• limit — max results (default 50, max 200)

list_tasks (read-only, idempotent)

List tasks from the MythOS task system. Aggregates standalone tasks, memo checklists, and daily memo checklists.

• completed — filter by completion status (boolean)
• limit — max results (default 50, max 200)
• sort — due for due-date ascending order
• Returns: taskId, text, completed, source, sourceId, sourceTitle, notes, dueDate, dueDateISO, dueTime, repeat, lastCompletedAt

create_task (write)

Create a new standalone task.

• text (required) — task text (min 3 characters)
• notes — task notes in markdown
• dueDate — due date as ISO 8601 string
• dueTime — due time in HH:mm format. Requires dueDate
• repeat — recurrence rule object. Requires dueDate. Properties: frequency (required: daily, weekly, monthly, yearly), interval, daysOfWeek, endDate

complete_task (write, idempotent)

Mark a task as complete or incomplete. For repeating tasks: completing auto-advances the due date.

• taskId (required) — universal task ID from list_tasks
• completed (required) — true to complete, false to reopen

update_task (write, idempotent)

Update a task's text, notes, due date, due time, or repeat rule.

• taskId (required) — universal task ID from list_tasks
• text — new task text
• notes — new notes in markdown
• dueDate — new due date (ISO 8601) or null to clear
• dueTime — due time in HH:mm format or null to clear
• repeat — recurrence rule object or null to clear

read_daily_memo (read-only, idempotent)

Read a daily memo for a specific date. Returns full markdown content with Tasks checklist and Timeline entries.

• date (required) — date in YYYY-MM-DD format
• section — optional section heading to extract

add_daily_task (write)

Add a checklist task to the Tasks section of a daily memo. Auto-creates the daily memo if none exists.

• date (required) — date in YYYY-MM-DD format
• task (required) — the task text (without checkbox prefix)
• afterLine — optional: insert after a line matching this text exactly

add_daily_entry (write)

Add a bullet-point entry to a section of a daily memo. Defaults to the Timeline section.

• date (required) — date in YYYY-MM-DD format
• entry (required) — the entry text (without bullet prefix)
• section — section heading to insert into (default: Timeline)
• afterLine — optional: insert after a line matching this text exactly

Resources (8)

• memo://{username}/{id} — full markdown content of a memo
• profile://{username} — creator public profile (JSON)
• feed://{username} — latest 20 memo summaries (JSON)
• community://{slug} — community metadata and stats (JSON)
• augmentation://soul — the user's Mythos Soul memo
• augmentation://style — the user's Mythos Style memo
• augmentation://human — the user's Mythos Human memo
• augmentation://memory — the user's Mythos Memory memo

Prompts (3)

enrich_memo

Analyze a memo and suggest tags, related topics, and a one-sentence summary.

• memoId (required)

summarize_library

Create a briefing of a creator's knowledge library.

• username (required)

find_connections

Find conceptual connections between two memos.

• memoId1 (required)
• memoId2 (required)

• #api-reference
• #model-context-protocol
• #mythos-feature