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Documentation Index

Fetch the complete documentation index at: https://authsome.agentr.dev/docs/llms.txt

Use this file to discover all available pages before exploring further.

Slack is a bundled OAuth2 provider in authsome. Workspace channels and chat write. Add more scopes through --scopes.

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At a glance

Provider nameslack
Display nameSlack
Auth typeOAuth2
Default flowpkce, PKCE browser flow
PKCE supportedNo
Device code supportedNo
DCR supportedNo
Default scopeschannels:read, chat:write
Proxy hostslack.com
Env var (access_token)SLACK_ACCESS_TOKEN
Env var (refresh_token)SLACK_REFRESH_TOKEN

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Prerequisites

You need to register an OAuth app with Slack once. Create a Slack app in the API portal. Under OAuth & Permissions, add http://127.0.0.1:7998/auth/callback/oauth as a redirect URL. The redirect URI must be: 
http://127.0.0.1:7998/auth/callback/oauth
This is the only callback URL authsome’s PKCE flow listens on. Dashboard: https://api.slack.com/apps.
Slack’s OAuth v2 endpoint does not require PKCE. Authsome runs the standard authorization-code flow.

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Log in

uvx authsome login slack
The first time, authsome opens a local form at http://127.0.0.1:7998 to collect your client_id and client_secret. They are encrypted under your profile and reused on every subsequent login. A second browser window then opens to https://slack.com/oauth/v2/authorize for the authorization step. Verify: 
uvx authsome get slack --field status
# → connected

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Custom scopes

The bundled definition requests channels:read, chat:write. Override at login time: 
uvx authsome login slack --scopes "<comma-separated>"
The granted scopes are stored on the connection and visible in uvx authsome get slack.

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Multiple accounts

Pass --connection <name> on login and on every read command to keep two or more accounts on the same provider side by side. See Multiple connections per provider for the full pattern. 
uvx authsome login slack --connection personal
uvx authsome login slack --connection work

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Use the token

Run the agent under the proxy. The library tab is for embedding authsome inside a larger Python orchestrator. 
uvx authsome run -- python my_agent.py
Under the proxy, authsome sets SLACK_ACCESS_TOKEN=authsome-proxy-managed in the child’s environment and injects the real token into outbound requests to slack.com. The child process never sees the actual value. Refresh tokens are never exported.

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Override the bundled definition

uvx authsome inspect slack > ~/.authsome/providers/slack.json
# edit scopes, base_url, or anything else
uvx authsome list   # source now shows "custom" for slack
User-registered files always win over bundled definitions. See Provider schema.

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What’s next

Run agents with the proxy

Inject the access token into outbound requests without exposing it.

Multiple connections per provider

Keep two or more accounts on the same provider side by side.

Provider schema

Every field in a provider definition.

OAuth providers

All bundled OAuth providers.