authsome 0.1.8

A portable local authentication library for AI agents and developer tools

authsome

OAuth2 and API key management for agents. Local. Headless. No SaaS.

Your agent calls APIs. Authsome keeps the credentials fresh.

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The Problem

Agents need to call APIs. The current answers are all wrong for agents:

• Hardcode a PAT in .env — works until the token expires, rotates, or leaks
• Write OAuth2 yourself — ~200 lines of flow logic, token storage, and refresh handling per project, using authlib or requests-oauthlib, reinvented every time
• Nango — full OAuth infrastructure, but it's a SaaS service with a server you have to run or pay for

None of these are designed for agents. They assume a browser, a web server, or a human in the loop at runtime.

Authsome is a local credential layer your agent invokes at runtime. Authenticate once, headlessly. After that, your agent asks for headers and gets them.

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How It Works

The CLI is the agent's interface — for setup and for runtime use.

Authenticate once:

authsome login github

Then the agent gets a valid, automatically-refreshed token on demand:

authsome get github --field access_token
# → ghu_...

authsome export github --format shell
# → export GITHUB_TOKEN=ghu_...

authsome run --provider github --provider openai -- python my_agent.py
# runs the script with GITHUB_TOKEN and OPENAI_API_KEY injected

Credentials are stored locally, encrypted at rest (AES-256-GCM), and refreshed before expiry. No server. No account. No cloud.

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Why Authsome

	authsome	Hardcoded env tokens	DIY (authlib)	Nango
OAuth2 flows (PKCE, Device Code, DCR)	✅	❌	build it	✅
Automatic token refresh	✅	❌	build it	✅
Headless (CI, SSH, no browser)	✅	✅	varies	⚠️
Local — no SaaS dependency	✅	✅	✅	❌
35 providers, zero config	✅	❌	❌	✅
Multi-account per provider	✅	❌	build it	✅
One call for valid token	✅	❌	build it	✅

vs. DIY (authlib / requests-oauthlib): authlib handles the HTTP exchange, but you still write the token store, refresh logic, expiry handling, and per-provider config — then repeat it for every project. Authsome eliminates that boilerplate entirely.

vs. Nango: Nango is the closest conceptual peer — it manages OAuth for you across many providers. The difference: Nango requires a hosted server (or their SaaS). Authsome runs locally, follows your ~/.authsome directory, and has no external dependencies. It's the right choice when your agent runs on machines you control and you don't want infrastructure you don't own in the auth path.

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Quick Start

pip install authsome
authsome init
authsome login github                  # opens browser, completes PKCE flow
authsome login github --flow device    # headless: Device Code, works over SSH and CI
authsome login openai                  # prompts for API key
authsome list                          # all connections + token status

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CLI Reference

# Setup
authsome init                          # initialize ~/.authsome
authsome doctor                        # verify installation health

# Authentication
authsome login github                  # OAuth2 browser flow (PKCE)
authsome login github --flow device    # headless Device Code flow
authsome login openai                  # API key prompt
authsome logout github                 # revoke token remotely + remove locally
authsome remove github                 # remove local state only

# Inspect
authsome list                          # all connections + token status
authsome get github                    # connection metadata (secrets redacted)
authsome get github --show-secret      # reveal token
authsome get github --field status     # extract one field

# Export & inject
authsome export github --format shell  # → export GITHUB_TOKEN=...
authsome run --provider openai -- python my_agent.py

All commands support --json for machine-readable output and --profile to switch between credential sets (e.g., personal vs. work vs. a specific agent).

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Bundled Providers

35 providers, ready to use with zero configuration:

Developer & Productivity github · google · linear · okta · zapier · calendly · savvycal · typeform · buffer

AI & Data openai · clearbit · ahrefs · semrush · g2 · keywords-everywhere

Marketing & Email mailchimp · klaviyo · brevo · sendgrid · postmark · resend · beehiiv · instantly · lemlist

Sales & CRM apollo · hunter · intercom · mention-me · rewardful · tolt

Media & Analytics wistia · livestorm · optimizely · x · dub

Add your own by dropping a JSON file in ~/.authsome/providers/<name>.json.

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Technical Deep Dive

Architecture

┌─────────────────┐     ┌──────────────┐     ┌────────────────────┐
│   Agent / Tool  │────▶│     CLI      │────▶│  Provider Registry  │
│                 │     │              │     │  (bundled + local)  │
└─────────────────┘     └──────┬───────┘     └────────────────────┘
                               │
                        ┌──────┴───────┐
                        │  Auth Flows  │
                        ├──────────────┤
                        │ • PKCE       │  ← browser OAuth2
                        │ • Device Code│  ← headless / CI
                        │ • DCR + PKCE │  ← dynamic client reg
                        │ • API Key    │  ← prompt or env import
                        └──────┬───────┘
                               │
                        ┌──────┴───────┐
                        │   Storage    │
                        ├──────────────┤
                        │ SQLite KV    │  ← per-profile credential store
                        │ AES-256-GCM  │  ← encrypted at rest
                        └──────────────┘

The CLI resolves the right flow per provider, manages token refresh transparently, and persists credentials in a per-profile SQLite store. Profiles let you isolate credential sets (e.g., personal, work, a specific agent).

Auth Flows

Flow	When to Use
pkce	Browser-capable environments with a pre-registered OAuth client
device_code	Headless servers, CI, SSH sessions — no browser required
dcr_pkce	Services supporting Dynamic Client Registration — no pre-registration needed
api_key_prompt	Interactive terminal, prompts securely
api_key_env	Import a key already present in an environment variable

Custom Providers

Drop a JSON file at ~/.authsome/providers/my-service.json:

{
  "name": "my-service",
  "display_name": "My Service",
  "auth_type": "api_key",
  "flow": "api_key_prompt",
  "api_key": {
    "header_name": "X-API-Key",
    "header_prefix": "",
    "env_var": "MY_SERVICE_KEY"
  }
}

Then use it like any bundled provider:

authsome login my-service
authsome get my-service --show-secret

Multiple Connections

Same provider, multiple accounts:

authsome login openai --connection personal
authsome login openai --connection work

authsome get openai --connection work --show-secret
authsome run --provider openai --connection work -- python my_agent.py

Storage Layout

~/.authsome/
  config.json          # global settings (encryption mode, active profile)
  master.key           # encryption key (chmod 0600)
  providers/           # user-defined provider definitions
  profiles/
    default/
      store.db         # credential store (SQLite, values AES-256-GCM encrypted)
      lock             # advisory write lock

Environment Variables

Variable	Purpose
AUTHSOME_HOME	Override the default ~/.authsome directory

License

MIT — see LICENSE.