Connect any AI agent to your business

Connect your agent (under 60 seconds)

One endpoint, every MCP client. Pick yours — the only thing that changes is where you paste the URL.

Availability: Claude Pro, Team & Enterprise

1. 1
   In Claude.ai open Settings → Connectors → Add custom MCP server.
2. 2
   Paste the Rexium endpoint and save.https://mcp.rexium.ai
3. 3
   Claude opens the Rexium consent screen — pick the Business and the minimum scopes, then authorise.
4. 4
   Ask Claude about your store. It calls search_commerce_catalog against your live catalog index (custom fields included) — no sync, no stale data.

What your agent can do once connected

• Read your catalog. Query products by attribute (including your custom fields), check stock, list active discounts.
• Tag contacts. Apply or remove semantic tags on Layer 2 Contacts based on signals it reasoned about (“tag everyone who left a 5★ review as VIP”).
• Apply cart discounts. Validate a discount code against a cart, surface savings to the buyer, apply on confirmation.
• Adjust prices. Mutate product prices with audit trail — every change is logged and reversible.

The complete tool catalog is published per-Business at {your-store}/.well-known/rexium-agent.json. Tools are scoped — the consent screen lists exactly what each tool needs.

Technical contract

Protocol

Model Context Protocol (MCP), JSON-RPC over streamable HTTPS.

Endpoint

https://mcp.rexium.ai

Single endpoint serves every Rexium Business — the OAuth flow scopes the session to the Business you authorise.

Auth

OAuth 2.1 + PKCE (S256). Bearer Firebase ID token also accepted for development.

OAuth discovery

https://us-central1-rexium-ai.cloudfunctions.net/.well-known/oauth-authorization-server

Idempotency

Every mutating tool honours the Idempotency-Key header (24h TTL). Safe for SDK retries.

Rate limits

X-RateLimit-Limit · X-RateLimit-Remaining · X-RateLimit-Reset on every response. Honour these to back off proactively.