AvianSuite MCP server

Stellar Jay

Safe write access for AI agents. Stellar Jay is where your agents keep business data. Every change is kept, attributed to the agent that made it, and can be undone. Think of it as Git for your business data.

$20/month per store, with a 14-day free trial.

• Hosted: AvianSuite runs Stellar Jay for you.

gets a store running on your machine in a few minutes.

• Self-hosted: free and open source under the AGPL. The quick start below

Agent setup

Connect an agent with the MCP server. On AvianSuite, add the remote server:

# Claude Code
claude mcp add --transport http aviansuite https://mcp.aviansuite.com/mcp

// Cursor: .cursor/mcp.json
{"mcpServers": {"aviansuite": {"url": "https://mcp.aviansuite.com/mcp"}}}

In Claude and ChatGPT, add a custom connector with the same URL.

For a self-hosted store, run the local server instead:

{
  "mcpServers": {
    "aviansuite": {
      "command": "stellarjay-mcp",
      "env": {"STELLARJAY_URL": "https://store.example.com", "STELLARJAY_TOKEN": "writer-token"}
    }
  }
}

Install it with go install github.com/kyle-visner/stellarjay/cmd/stellarjay-mcp@latest. Tools and details: docs/mcp.md.

Why

Clients want agents that do the work, not just read about it. But when an agent writes straight into a CRM or ticketing system, one bad decision or runaway loop can overwrite or delete records, and there is often no way back.

Stellar Jay is built so that can't happen:

entry, and the original stays in history.

• Nothing is overwritten or deleted. A correction or retraction is a new

see exactly which agent changed what, and when.

• Every change has a name on it. Each agent gets its own token, so you can

window, with a preview first.

• Any change can be undone. Roll back everything one agent did in a time

shows.

• History is tamper-evident. If anyone rewrites or removes past entries, it

duplicates, and a write based on stale information is refused.

• Retries are safe. An agent that retries after a timeout doesn't create

records need no migrations.

• Your data stays flexible. Facts are JSON, so new fields and new kinds of

Stellar Jay records what agents say happened. It doesn't decide whether a fact is true; it makes sure a wrong one stays visible and correctable.

Who it's for

Developers, consultants, and small teams moving from read-only copilots to agents that are allowed to act: operations, accounting, approvals, support, and other work where the data matters. Each store serves one organization. Many agents and apps can share it.

Quick start (self-hosted)

Requires Go 1.22 or later.

1. Install and create secrets.

go install github.com/kyle-visner/stellarjay/cmd/stellarjay-server@latest
stellarjay-server init ./secrets

init creates a data encryption key and prints an admin, writer, and reader token once. Save them in a password manager.

2. Start the server.

export STELLARJAY_DATA_DIR=./data
export STELLARJAY_DATA_KEY_FILE=./secrets/data_key
export STELLARJAY_AUTH_FILE=./secrets/auth.json
stellarjay-server serve

It listens on 127.0.0.1:8080.

3. Record a fact. In another terminal:

export STELLARJAY_URL=http://127.0.0.1:8080
export STELLARJAY_TOKEN='the-writer-token'

curl -fsS -X POST "$STELLARJAY_URL/v1/events" \
  -H "Authorization: Bearer $STELLARJAY_TOKEN" \
  -H "Content-Type: application/json" \
  -H "Idempotency-Key: first-fact" \
  --data '{
    "type": "business.fact",
    "entity_id": "customer-42",
    "command": "fact assert",
    "payload": {"predicate": "primary_contact", "value": "Ada Lovelace"},
    "expected_root": ""
  }'

Shortened. The full README is on GitHub.