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Connect Sentry to Hermes

Give Hermes governed access to Sentry’s 16 tools through Runlayer, with identity, policy, scanning, and audit on every call.

Book a demo Hermes setup guide

Set up

Add Sentry to Hermes in four steps

Admins approve the server once. Everyone in Hermes then gets it through the same governed connection.

  1. 1

    Approve Sentry in Runlayer

    Add Sentry from the catalog and choose who can use it and which of its tools are allowed.

  2. 2

    Connect Hermes to Runlayer

    Users add the Runlayer Plugin to Hermes by following Runlayer’s setup guide. Hermes reaches Sentry’s 16 tools through the Runlayer Plugin’s search and execute tools instead of listing each one.

    Hermes setup guide
  3. 3

    Sign in to Sentry

    Sign in the way Sentry requires. Runlayer holds the credentials so they stay out of the client’s configuration.

  4. 4

    Use Sentry from Hermes

    Sentry’s approved tools appear in Hermes. Every call is checked against policy and recorded.

Tools

16 Sentry tools in Hermes

Runlayer policy decides which of these Hermes users can call. 4 read data only.

  • Analyze issue with seer

    Use Seer to analyze production errors and get detailed root cause analysis with specific code fixes.

  • Execute Sentry tool

    Execute an available Sentry MCP tool discovered through search_sentry_tools.

  • Find dropped events

    Find events dropped before they were stored in Sentry — ground-truth data-fidelity information about what was and wasn't captured.

  • Find organizations

    Find organizations that the user has access to in Sentry.

  • Find projects

    Find projects in Sentry.

  • Get Sentry resource

    Fetch a Sentry resource by URL, or by resourceType plus resourceId.

  • Search errors

    Search Sentry error events: exceptions and crashes with stack traces.

  • Search events

    Search Sentry events and replays.

See all 16 Sentry tools

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 Sentry 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

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