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How to give your Hermes agent a spoken voice with Fish Audio Hermes

Install the Fish Audio plugin so voice replies and read-aloud use Fish Audio speech.

  • Top pick
  • Content
  • Intermediate
  • 30 minutes
  • From the README
  • Any agent

Authorization notice. Fish Audio Hermes is dual-use. Only use it on software, sites and systems you own or have explicit permission to test.

Credentials. Your Fish Audio API key is saved to the active Hermes profile, so do not paste it into chat; `/fish` refuses keys sent in chat.

Who it is forA Hermes Agent user who wants replies, read-aloud and voice notes spoken aloud in the CLI or a messaging app.

The problemHermes needs a speech provider and a saved key before it can speak, and the setup has several steps.

The outcomeThe agent speaks through Fish Audio, and the setup check confirms that one test synthesis works.

What you need first

  • Hermes Agent installed, with the plugin install command available
  • A Fish Audio account and API key from https://fish.audio/app/api-keys
  • Fish Audio API credit, or the free s2.1-pro-free model for new accounts (free through 30 November 2026)

Steps

  1. Run hermes plugins install fish-audio --enable on the machine that runs Hermes.
  2. Run hermes fish login and paste your key from https://fish.audio/app/api-keys.
  3. Answer the provider prompt, or pass --yes if you want Fish Audio to replace another speech provider.
  4. Run hermes fish doctor to make one short billed synthesis, or hermes fish doctor --no-synth to skip it. (inferred, check the README)
  5. Ask the agent to read a short reply aloud and listen to the result.

Prompt for your agent

Using the repo 100yenadmin/fish-audio-hermes, install the Fish Audio plugin for Hermes Agent on <target machine> and run the setup check with `hermes fish doctor --no-synth`. Expected output: the plugin is enabled and the status check reports no errors. Verify that `hermes fish status` shows Fish Audio as the speech provider.

Caveat. Hermes 0.21.6 and newer ask before installing Python dependencies, and older Hermes versions install them without asking.

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