How to Connect BigQuery MCP to Hermes

Query your BigQuery data directly from Hermes using Sequel’s MCP server. Ask questions in plain English — no SQL, no dashboards, no context switching.

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Example prompts

Everything you can ask Hermes about your BigQuery data.

Ask in plain English — Sequel translates it into a BigQuery query, runs it, and Hermes hands back the answer. No SQL, no dashboards, no CSV exports.

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What you can ask Hermes

What are the top 10 events by count this week?
Show me daily revenue for the past 30 days as a line chart
Which users had the highest session count last month?
What's the p95 query latency by dataset over the past 7 days?
List all tables in my analytics dataset with row counts

How it works

Three steps to get started

Connect BigQuery to Sequel

In your Sequel dashboard, go to Connections and add BigQuery. Sequel handles authentication and schema discovery automatically.

Add the MCP config

Copy the Sequel MCP configuration into Hermes's settings file (shown below). Swap in your API key from Settings → API Keys.

Ask Hermes about your data

Restart Hermes and start asking questions. "What are the top 10 events by count this week?" — and get a real answer backed by live BigQuery data.

Configuration

Add Sequel to Hermes

Place this in ~/.hermes/config.yaml and replace sql_your_api_key with a key from Settings → API Keys.

~/.hermes/config.yaml

mcp_servers:
  sequel:
    url: "https://api.sequel.sh/mcp"
    headers:
      Authorization: "Bearer sql_your_api_key"

Sequel CLI

Install BigQuery MCP to Hermes

The Sequel CLI installs BigQuery into Hermes in one step — it signs you in, provisions a scoped API key, and writes the right config to the right place. No keys to copy by hand.

Prefer npm? npm install -g @sequelsh/cli@latest works too.

1
Install the Sequel CLI
One line installs the latest CLI with whatever package manager you have.
```
curl -fsSL https://sequel.sh/install | sh
```
2
Sign in
Authenticate in your browser and pick an organization.
```
sequel login
```
3
Install into Hermes
One command installs Sequel into Hermes and writes its MCP config.
```
sequel install hermes
```

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Frequently asked questions

How do I connect BigQuery to Hermes?

You need two things: (1) connect BigQuery to Sequel in your Sequel dashboard under Connections, and (2) add the Sequel MCP config to Hermes using the setup shown above. Once both are done, Hermes can query your BigQuery data directly.

What BigQuery data can Hermes access?

Hermes can access any data available through your BigQuery connection in Sequel. Use Sequel's search tool to discover available metrics and dimensions, then execute queries to pull the data you need.

Is my BigQuery data sent to Hermes's servers?

Query results are returned to Hermes as context within your conversation. Only the data you explicitly ask about is retrieved. Sequel never stores your query results permanently — they exist only for the duration of the tool call.

Do I need a Sequel account?

Yes. You need a Sequel account to connect BigQuery and generate an API key. Sign up free at sequel.sh — no credit card required. Then create a connection to BigQuery and generate an API key from Settings → API Keys.

Can I connect multiple BigQuery accounts?

Yes. Sequel supports multiple connections of the same type. If you have multiple BigQuery accounts or properties, add each as a separate connection in Sequel. Hermes will be able to query all of them.

Connect BigQuery to Hermes today

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