Add Rexium AI to Claude

Setup (under 60 seconds)

1. 1

   Open Claude.ai Connectors

   In Claude.ai go to Settings → Connectors → Add custom MCP server. Available on Claude Pro and Claude Team workspaces.
2. 2

   Paste the Rexium MCP endpoint

   https://mcp.rexium.ai

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

3. 3

   Authorise the scopes you want

   Claude opens the Rexium consent screen. Pick the Business you want to expose and the minimum scopes required (read-products, write-discounts, etc.). Re-grant anytime from your Integrations page.
4. 4

   Ask Claude about your store

   Try: "Quais os meus 3 produtos com vintage anterior a 2010 ainda em stock?" — Claude uses search_commerce_catalog to query your Spine.3-aware index and answers with the live catalog. No knowledge-base sync; no stale data.

What Claude can do once connected

• Read your catalog. Query products by attribute (including your custom Spine.3 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 details

Protocol

Model Context Protocol (MCP) 2024-11-05, JSON-RPC over HTTPS.

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 honors the Idempotency-Key header (24h TTL). Safe for SDK retries.

Rate limits

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