# KeyKeeper (keykeeper.world)

Private email inboxes for people and AI agents, with a mail API and optional OpenPGP body encryption.

- Atlas card: https://inite.ai/en/atlas/keykeeper.world
- Site: https://keykeeper.world
- For: people wanting private email, and AI agents or developers needing their own mailbox
- Categories: productivity
- Use not measured/100 · alive 100/100

## Used for

- send and receive mail from your own custom domain
- give an AI agent a mailbox it can read
- send transactional app notifications through a mail API

## Price

- from 1 USD/month, no free plan (read 2026-11-03 on https://keykeeper.world/pricing)

## For developers

- OpenAPI: https://keykeeper.world/openapi.json (31 paths)
- API docs: https://keykeeper.world/developers
- MCP server: world.keykeeper/email (namespace; open on 2026-11-03, 13 tools)
- Read 2026-11-03

## MCP server, measured daily

Server: https://keykeeper.world/mcp, checked every day since 2026-11-03 (2 checks).

- Answered: measuring, 2 daily checks so far
- Median first answer: 234 ms
- Sign-in: none
- Context its tool definitions take: about 2653 tokens (13 tools)
- Tool definitions: B, 77/100
- Failing "params_described": 9 of 13 tools
- Failing "annotations": 9 of 13 tools
- Warning "open_writes": send_email, create_payment, update_proposal
- Method: https://inite.ai/en/atlas/mcp/report

## Your data

- Certifications stated: none
- Read 2026-11-03

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Source: INITE Atlas, https://inite.ai/en/atlas/keykeeper.world. JSON: https://inite.ai/api/atlas/keykeeper.world. MCP: https://inite.ai/api/mcp (atlas_lookup).