Pre-flight query cost and result-size guardrails for AI agents on BigQuery, Snowflake, Databricks
To add Cost Guard MCP to Claude, run the install command below or copy the ready-made config for Claude Code, Claude Desktop, Cursor and VS Code further down. Restart your client after adding it and its tools show up in your next conversation. It needs 19 environment variables, listed below.
Install
uvx cost-guard-mcp@0.6.0Environment variables
GOOGLE_APPLICATION_CREDENTIALSSet in your MCP configSNOWFLAKE_ACCOUNTSet in your MCP configSNOWFLAKE_USERSet in your MCP configSNOWFLAKE_ROLESet in your MCP configSNOWFLAKE_SECONDARY_ROLESSet in your MCP configSNOWFLAKE_PRIVATE_KEY_PATHSet in your MCP configSNOWFLAKE_PRIVATE_KEY_PASSPHRASESet in your MCP configSNOWFLAKE_PASSWORDSet in your MCP configSNOWFLAKE_EDITIONSet in your MCP configDATABRICKS_SERVER_HOSTNAMESet in your MCP configDATABRICKS_HTTP_PATHSet in your MCP configDATABRICKS_TOKENSet in your MCP configDATABRICKS_CLIENT_IDSet in your MCP configDATABRICKS_CLIENT_SECRETSet in your MCP configCOST_GUARD_ALLOW_MULTI_STATEMENT_SQLSet in your MCP configCOST_GUARD_ALLOW_WRITE_STATEMENTSSet in your MCP configCOST_GUARD_MAX_IN_FLIGHT_QUERIESSet in your MCP configCOST_GUARD_DATABRICKS_ALLOW_WAREHOUSE_STARTSet in your MCP configCOST_GUARD_SNOWFLAKE_ALLOW_WAREHOUSE_RESUMESet in your MCP configInstall with your client
claude mcp add cost-guard --env GOOGLE_APPLICATION_CREDENTIALS=<YOUR_GOOGLE_APPLICATION_CREDENTIALS> --env SNOWFLAKE_ACCOUNT=<YOUR_SNOWFLAKE_ACCOUNT> --env SNOWFLAKE_USER=<YOUR_SNOWFLAKE_USER> --env SNOWFLAKE_ROLE=<YOUR_SNOWFLAKE_ROLE> --env SNOWFLAKE_SECONDARY_ROLES=<YOUR_SNOWFLAKE_SECONDARY_ROLES> --env SNOWFLAKE_PRIVATE_KEY_PATH=<YOUR_SNOWFLAKE_PRIVATE_KEY_PATH> --env SNOWFLAKE_PRIVATE_KEY_PASSPHRASE=<YOUR_SNOWFLAKE_PRIVATE_KEY_PASSPHRASE> --env SNOWFLAKE_PASSWORD=<YOUR_SNOWFLAKE_PASSWORD> --env SNOWFLAKE_EDITION=<YOUR_SNOWFLAKE_EDITION> --env DATABRICKS_SERVER_HOSTNAME=<YOUR_DATABRICKS_SERVER_HOSTNAME> --env DATABRICKS_HTTP_PATH=<YOUR_DATABRICKS_HTTP_PATH> --env DATABRICKS_TOKEN=<YOUR_DATABRICKS_TOKEN> --env DATABRICKS_CLIENT_ID=<YOUR_DATABRICKS_CLIENT_ID> --env DATABRICKS_CLIENT_SECRET=<YOUR_DATABRICKS_CLIENT_SECRET> --env COST_GUARD_ALLOW_MULTI_STATEMENT_SQL=<YOUR_COST_GUARD_ALLOW_MULTI_STATEMENT_SQL> --env COST_GUARD_ALLOW_WRITE_STATEMENTS=<YOUR_COST_GUARD_ALLOW_WRITE_STATEMENTS> --env COST_GUARD_MAX_IN_FLIGHT_QUERIES=<YOUR_COST_GUARD_MAX_IN_FLIGHT_QUERIES> --env COST_GUARD_DATABRICKS_ALLOW_WAREHOUSE_START=<YOUR_COST_GUARD_DATABRICKS_ALLOW_WAREHOUSE_START> --env COST_GUARD_SNOWFLAKE_ALLOW_WAREHOUSE_RESUME=<YOUR_COST_GUARD_SNOWFLAKE_ALLOW_WAREHOUSE_RESUME> -- uvx cost-guard-mcp@0.6.0
Run this in a terminal to add the server to Claude Code.
What this does
Cost Guard MCP exposes a set of tools to Claude over the Model Context Protocol. After you add it to claude_desktop_config.json (snippet above) and restart Claude Desktop, those tools become callable inside any conversation.
Requirements
This server needs the following environment variables to be set before it can run:
GOOGLE_APPLICATION_CREDENTIALS SNOWFLAKE_ACCOUNT SNOWFLAKE_USER SNOWFLAKE_ROLE SNOWFLAKE_SECONDARY_ROLES SNOWFLAKE_PRIVATE_KEY_PATH SNOWFLAKE_PRIVATE_KEY_PASSPHRASE SNOWFLAKE_PASSWORD SNOWFLAKE_EDITION DATABRICKS_SERVER_HOSTNAME DATABRICKS_HTTP_PATH DATABRICKS_TOKEN DATABRICKS_CLIENT_ID DATABRICKS_CLIENT_SECRET COST_GUARD_ALLOW_MULTI_STATEMENT_SQL COST_GUARD_ALLOW_WRITE_STATEMENTS COST_GUARD_MAX_IN_FLIGHT_QUERIES COST_GUARD_DATABRICKS_ALLOW_WAREHOUSE_START COST_GUARD_SNOWFLAKE_ALLOW_WAREHOUSE_RESUME
Set these via the env object in your MCP config (see claude_desktop_config.json snippet above).
Frequently asked questions
How do I install Cost Guard MCP?
Run the Claude Code command in the install section to add Cost Guard MCP to Claude Code, or copy the ready-made config for your client from the install section on this page. Restart your client afterwards and the tools appear in your next conversation.
Which clients work with Cost Guard MCP?
This page carries setup and config for Claude Code, Claude Desktop, Cursor and VS Code. Any other MCP client that accepts a standard server config can connect to Cost Guard MCP as well.
Does Cost Guard MCP need an API key?
Yes. Before it can run, set these environment variables: GOOGLE_APPLICATION_CREDENTIALS, SNOWFLAKE_ACCOUNT, SNOWFLAKE_USER, SNOWFLAKE_ROLE, SNOWFLAKE_SECONDARY_ROLES, SNOWFLAKE_PRIVATE_KEY_PATH, SNOWFLAKE_PRIVATE_KEY_PASSPHRASE, SNOWFLAKE_PASSWORD, SNOWFLAKE_EDITION, DATABRICKS_SERVER_HOSTNAME, DATABRICKS_HTTP_PATH, DATABRICKS_TOKEN, DATABRICKS_CLIENT_ID, DATABRICKS_CLIENT_SECRET, COST_GUARD_ALLOW_MULTI_STATEMENT_SQL, COST_GUARD_ALLOW_WRITE_STATEMENTS, COST_GUARD_MAX_IN_FLIGHT_QUERIES, COST_GUARD_DATABRICKS_ALLOW_WAREHOUSE_START, COST_GUARD_SNOWFLAKE_ALLOW_WAREHOUSE_RESUME. They go in the env block of your MCP config.
Imported from the Official MCP Registry. The details above come from the registry entry; the maker can claim this listing to correct them, add docs, and see its traffic.
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