Connect Neon to Hermes
Give Hermes governed access to Neon’s 29 tools through Runlayer, with identity, policy, scanning, and audit on every call.
Set up
Add Neon to Hermes in four steps
Admins approve the server once. Everyone in Hermes then gets it through the same governed connection.
- 1
Approve Neon in Runlayer
Add Neon from the catalog and choose who can use it and which of its tools are allowed.
- 2
Connect Hermes to Runlayer
Users add the Runlayer Plugin to Hermes by following Runlayer’s setup guide. Hermes reaches Neon’s 29 tools through the Runlayer Plugin’s search and execute tools instead of listing each one.
Hermes setup guide - 3
Sign in to Neon
Sign in the way Neon requires. Runlayer holds the credentials so they stay out of the client’s configuration.
- 4
Use Neon from Hermes
Neon’s approved tools appear in Hermes. Every call is checked against policy and recorded.
Tools
29 Neon tools in Hermes
Runlayer policy decides which of these Hermes users can call.
List projects
Lists the first 10 Neon projects in your account.
List organizations
Lists all organizations that the current user has access to.
List shared projects
Lists projects that have been shared with the current user.
Create project
Create a new Neon project.
Delete project
Delete a Neon project
Describe project
Describes a Neon project
Run SQL
Execute a single SQL statement against a Neon database.
Run SQL transaction
Execute a SQL transaction against a Neon database, should be used for multiple SQL statements.
Control
What Runlayer can see and stop in Hermes
Some controls apply to every client at the gateway. Others depend on what Hermes exposes to Runlayer.
Gateway policy (available)
Every Neon call from Hermes passes through Runlayer, where your policies can allow, alert, mask, or block it.
Audit trail (available)
Each call is recorded with the user, Hermes as the client, the tool, and the policy and scanner decisions.
Client hooks (available)
Capture supported prompts, reasoning, local and MCP tool calls, responses, and scanner decisions in real time.
Stop a call before it runs (available)
Runlayer can deny a tool call before Hermes runs it.
Block output after it runs (available)
Runlayer can block a tool’s output in Hermes and show a message in its place.
Redact output in place (not available)
Hermes cannot take masked output, so Runlayer can block a tool’s output but not mask it. The gateway still applies policy to the call.
In Hermes
- Hermes can replace blocked tool output with a message, but its after-call event is for monitoring only.
Frequently asked questions
Connect more