Sai by Simular for Hermes
Give Hermes a computer. This package lets Hermes hand tasks to
Sai, Simular's computer-use agent. Sai uses apps
and websites the way a person does, by seeing the screen, clicking and typing,
so Hermes can get work done where there is no API: web apps behind a login,
admin consoles, desktop software, forms with no import. Sai runs on a cloud
computer Simular hosts; the free plan includes one.
It is an Agent Plugins v1 package (plugin.json, mcp.json, skills/) with
no code of its own.
Install
-
Sign in at platform.simular.ai and create an
API key under API Keys. -
Install and enable the plugin:
hermes plugins install simular-sai --no-enable hermes plugins enable simular-sai -
Set the key in the Desktop under Settings > Plugins, or put
SAI_API_KEY=sapi_...in your Hermes profile's.env(or your shell).
Requires Node.js 22.12 or later and npm, because the MCP server runs through
npx.
Then ask Hermes something like: "Use Sai to open Notepad on my cloud computer,
type Hello from Sai, and tell me the window title."
What it contains
- MCP server
sai: the open-source
@simular-ai/sai-mcp
package, pinned to0.4.0and started withnpx. Tools: start a task, wait
for it, answer permission requests, stop it, upload a file, list computers
and models, and hand the screen to a person with a link. - Skill
simular-sai:sai: tells Hermes when to hand a task to Sai and how
to run it to the end, including permission requests and sign-in links.
Data and network
npxdownloads@simular-ai/sai-mcp@0.4.0and its dependencies from the
npm registry on first start.- The MCP server sends your tasks, the files you ask it to upload and your API
key to the Sai API athttps://api.simular.ai, which runs the task on your
Sai cloud computer and returns its text result. Tasks use your Sai account's
credit or the free plan's daily computer time. - It serves a live view of the task on
127.0.0.1on your own computer,
linked aswatch_url. Your API key never reaches the browser. sai_live_linkreturns a link that lets anyone who has it use your cloud
computer until it expires. The skill tells the agent to give it only to you.- The package stores nothing itself and has no hooks, background processes or
telemetry.
Privacy policy: simular.ai/product-sai/privacy.
Support: support@simular.ai.
README from the reviewed commit 365b247; it updates when the author re-pins.

Simular