Ternary MCP for Claude

This guide connects claude.ai to your Ternary data. When you finish, you can ask Claude questions like "what were our top 10 GCP services by spend last month?" and it answers from your live billing data.

Requirements

A Claude Pro, Max, Team, or Enterprise plan. Custom connectors are not available on the free plan.
A Ternary account (the email you use to sign in to Ternary).
On Team and Enterprise plans, an admin may need to add the connector for the organization, or enable custom connectors for members.

Add the connector

In claude.ai, open Settings → Connectors.
Scroll to the bottom and click Add custom connector.
Fill in the form:
- Name: Ternary (any name works — this is just the label you'll see in Claude).
- URL: your region's server URL:
  - US: https://core-api.ternary.app/mcp
  - EU: https://core-api.eu.ternary.app/mcp
- Leave the advanced OAuth fields (client ID / secret) empty. Claude discovers the OAuth configuration automatically.
Click Add.
Claude opens a Ternary sign-in window. Log in with your Ternary credentials and approve the access request.

The connector now appears in your list with a Connected state.

Use it in a chat

Start a new chat.
Click the search and tools button (sliders icon) below the message box and confirm the Ternary connector is enabled.
Ask a cost question. On the first data question, Claude typically lists your tenants, picks (or asks you to pick) one, discovers the right fields, and runs the query.

Good first prompts:

"Which Ternary tenants can I access?"
"Show my total cloud spend for last month, grouped by service."
"List my saved reports and summarize the one named Monthly Executive Summary."

Troubleshooting

❗️
"Couldn't reach Ternary" when adding the connector
Retry once — the first attempt can time out while the service warms up. If it keeps failing, verify you used the exact URL including the /mcp path, and the right region.

Sign-in fails or loops — your email must belong to an existing Ternary user in that region. US and EU are separate: a US account cannot authenticate against the EU URL, and vice versa.
"No tenants found" — your Ternary user has no explicit role on any tenant. Ask your Ternary admin to grant you a role on the tenants you need.
Claude doesn't use the connector — check that it's enabled for the current chat under the search-and-tools menu, and phrase the question so it clearly needs Ternary data.