What is capacities-mcp CLAUDE.md?

Project instructions for an MCP server that connects to the Capacities note-taking API. They explain development commands, API documentation, API-key setup, and tools for listing, searching, and reading content.

Use them to develop, test, build, authenticate, or use the server to search Capacities spaces and read their content.

They provide the setup details needed to run and authenticate the server and clarify how its Capacities operations work.

How jem-computer/capacities-mcp configures Claude Code

Reuse

Borrowing it

Nothing to install: this file belongs to jem-computer/capacities-mcp. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/jem-computer/capacities-mcp/main/CLAUDE.md

Clone the repo

git clone --depth 1 https://github.com/jem-computer/capacities-mcp

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/instructions/jem-computer/capacities-mcp/claude-md/github.svg)](https://agentmods.dev/instructions/jem-computer/capacities-mcp/claude-md)

Your own site

<a href="https://agentmods.dev/instructions/jem-computer/capacities-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/jem-computer/capacities-mcp/claude-md/github.svg" alt="Measured on agentmods" height="20"></a>

Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/instructions/jem-computer/capacities-mcp/claude-md"><img src="https://agentmods.dev/badge/instructions/jem-computer/capacities-mcp/claude-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 536 This file is loaded in full into every session.

When invoked 536 The same file — it is already loaded in full.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00536	$0.00536
Opus 5.5	$0.00214	$0.00214
Sonnet 5.5	$0.00107	$0.00107
Haiku 4.5	$0.00054	$0.00054

Measured 1mo ago against content hash d0ef5a315e6f, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

capacities-mcp CLAUDE.md scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 1mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

Origin

Copies of this mod

1 near-identical copy found in the catalogue:

capacities-mcp CLAUDE.md — 89% identical, 11 lines differ

CLAUDE.md · 58 lines

What it actually says

Capacities MCP Server

This is an MCP server for the Capacities API (https://docs.capacities.io/developer/api).

Development

Use bun as the package manager
Use bun run dev to start the development server
Use bun run lint to check code quality and types
Use bun run test to run tests
Use bun run build to build for production

API Reference

The Capacities API documentation is available at:

Docs: https://api.capacities.io/docs/
OpenAPI Schema: https://api.capacities.io/openapi.json

Authentication

Set the CAPACITIES_API_KEY environment variable with your Capacities API token.

For development, copy .env.example to .env and add your API key:

cp .env.example .env
# Edit .env and add your API key

Available Tools

capacities_list_spaces - Get user's personal spaces
capacities_get_space_info - Get structures and collections for a space
capacities_search - Search content across spaces
- mode defaults to "title" if not specified
capacities_read_object_content - Retrieve full content of an object by ID
- Parameters: objectId (UUID), spaceId (UUID), title (optional string)
- How it works: Tries undocumented endpoints first, then falls back to search API aggregation
- Note: Providing title parameter greatly improves search results
- Returns aggregated content from search snippets when direct endpoint unavailable
capacities_save_weblink - Save a web link to a space
- Parameters: titleOverwrite, descriptionOverwrite, tags, mdText
capacities_save_to_daily_note - Add text to today's daily note
- origin only accepts "commandPalette"
- Use noTimestamp: true to skip timestamp

Available Prompts

capacities-daily-summary - Create structured daily summaries
capacities-research-note - Format research findings
capacities-meeting-notes - Structure meeting notes

Rate Limits

/spaces: 5 requests per 60 seconds
/space-info: 5 requests per 60 seconds
/search: 120 requests per 60 seconds
/save-weblink: 10 requests per 60 seconds
/save-to-daily-note: 5 requests per 60 seconds

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

1mo ago First seen · 58 lines · 536 tokens per session scan A d0ef5a315e6f

Subscribe to this mod's changes

capacities-mcp CLAUDE.md is an instructions file published in the GitHub repository jem-computer/capacities-mcp (42 stars, last pushed 6mo ago), licensed MIT. It adds 536 tokens to every session, about $0.0021 per session on Opus 5.5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

Building agents capacities fastmcp mcp mcp-server

vscode buildNext.instructions.md

Working notes and architecture documentation for the new esbuild-based build system in build/next. Use when making changes to the new build pipeline (transpile/bundle commands, NLS plugin, source-map handling, resource copying, or self-hosting watch tasks).

microsoft/vscode · 9,715 tokens

capacities-mcp: Instructions file for Claude Code