Postern
One MCP gateway to your money, health, mail, and home
What it does
Postern connects your Money, Health, Calendar, Mail, Contacts, and Home to any AI agent or harness through one self-hosted gateway. No glue code, no credentials handed to the agent, no guessing endpoints or schemas. Most of the information is served from the local cache, while the agents can fetch any information live. Access is granted per sector, per agent, is easily revocable, and all access by agents is audited and logged.
One gateway, on your own computer, between your life and any AI agent you allow.
The agent reads an index first. Then it asks for the 6 rows it actually wants. The agent that leaves takes nothing with it. Your connections and your grants stay. The agent’s whole config is your Postern’s address plus this key. It never holds a password of yours. The agent is on the record from its first minute. One place to revoke it. Postern reads from all of them. Only Home Assistant accepts actions today. git clone https://github.com/getpostern/postern.git && cd postern printf 'POSTGRES_PASSWORD=%s\n' "$(openssl rand -hex 24)" > .env docker compose up -d The install guide covers remote access and your first key → Hand the setup to your agent. FOR YOUR AGENT Paste one line into Claude…from getpostern.com
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