# Checkbox

> Checkbox, an MCP server by checkbox.site, listed from the official MCP registry. Indexed, not reviewed: facts and our own checks, no score or ranking. Auto-renewal law compliance (ROSCA, CA, NY, other states) for subscription checkout and emails

- Canonical: https://www.anchorterminal.com/tools/checkbox
- Markdown: https://www.anchorterminal.com/tools/checkbox.md (~500 tokens)
- Slim: https://www.anchorterminal.com/tools/checkbox.min.md (~430 tokens, same facts, less prose, for token-sensitive contexts)
- JSON: https://www.anchorterminal.com/tools/checkbox.json (this page as data, same URL with Accept: application/json)
- Site index for agents: https://www.anchorterminal.com/llms.txt (the key docs and every listing in one file, at most 16 MB, about 4 million tokens: https://www.anchorterminal.com/llms-full.txt)
- API: https://www.anchorterminal.com/api/v1/index.json
- MCP: https://www.anchorterminal.com/mcp (the whole catalogue as tools, no key)
- DNS: dig +short TXT checkbox.grade.anchorterminal.com (the grade as a DNS TXT record, for a sandbox with no HTTP where names still resolve; also top., best.<category>. and <a>.vs.<b>. under the zone, and the same under grade.letme.dev)
- Licence: CC BY 4.0, credit Anchor Terminal and link this page (https://www.anchorterminal.com/terms/#data)
- Updated: 2026-11-05

# Checkbox

> Indexed, not reviewed: facts from the official MCP registry and our own checks. No score, grade or rank, and not in the rankings until the panel reviews it. How the index works: https://www.anchorterminal.com/indexed/

- Kind: MCP server, by checkbox.site (https://checkbox.site/docs/mcp)
- Category: Email delivery APIs (https://www.anchorterminal.com/categories/email.md)
- Listed because: It's published in the registry under checkbox.site, a namespace the registry only gives to whoever proves they control that domain.
- What the official MCP registry says: Auto-renewal law compliance (ROSCA, CA, NY, other states) for subscription checkout and emails

## Facts

- MCP registry: `site.checkbox/checkbox` 1.0.1
- Endpoint: https://app.checkbox.site/mcp (streamable HTTP)
- Package: npm `@checkbox-site/mcp` (stdio)
- Source: https://github.com/checkbox-site/checkbox
- Website: https://checkbox.site/docs/mcp
- npm downloads a week: 348
- GitHub stars: 0
- Registry entry updated: 2026-11-04

- JSON: https://www.anchorterminal.com/api/v1/tools/checkbox.json
- Being indexed says nothing about quality, and nobody can pay for it. Ask for a review: https://www.anchorterminal.com/builders/#claiming

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Query this catalogue directly over MCP: https://www.anchorterminal.com/mcp (Streamable HTTP, no key). How: https://www.anchorterminal.com/agents/#mcp