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Connect LaunchDarkly to Hermes

Give Hermes governed access to LaunchDarkly’s 141 tools through Runlayer, with identity, policy, scanning, and audit on every call.

Book a demo Hermes setup guide

Set up

Add LaunchDarkly to Hermes in four steps

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

  1. 1

    Approve LaunchDarkly in Runlayer

    Add LaunchDarkly 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 LaunchDarkly’s 141 tools through the Runlayer Plugin’s search and execute tools instead of listing each one.

    Hermes setup guide
  3. 3

    Sign in to LaunchDarkly

    An admin adds LaunchDarkly credentials to Runlayer once. They never sit in the client’s configuration.

  4. 4

    Use LaunchDarkly from Hermes

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

Tools

141 LaunchDarkly tools in Hermes

Runlayer policy decides which of these Hermes users can call.

  • Apply agentcontrol config approval

    Apply an already-approved AgentControl Config approval request.

  • Apply approval request

    Apply an already-approved flag approval request.

  • Archive flag

    Archive a feature flag (reversible).

  • Check flag rollout complete

    Check whether a feature flag is fully rolled out to a single deterministic variation across all traffic-bearing environments.

  • Check removal readiness

    Detailed safety check before removing a feature flag.

  • Clone agentcontrol config variation

    Clone an existing AgentControl Config variation with selective overrides.

  • Copy flag config

    Copy a flag's targeting configuration from one environment to another.

  • Create agent graph

    Create a new agent graph in a project.

See all 141 LaunchDarkly 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 LaunchDarkly 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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