# StackHangar Docs > Guides and reference for StackHangar, a zero-knowledge vault for founders running several products. Every page is also available as Markdown: add .md to its URL. ## Get started - [What StackHangar is](https://docs.stackhangar.com/get-started.md): StackHangar keeps the keys, logins, subscriptions and renewals behind each of your products in one encrypted vault, grouped by project. - [Quickstart](https://docs.stackhangar.com/get-started/quickstart.md): Create your account, add a passkey, save your recovery key, create a project and add your first item. - [Concepts](https://docs.stackhangar.com/get-started/concepts.md): The words StackHangar uses, vault, project, account, item, environment, alert, playbook, run and agent, and how they fit together. - [Signing in and unlocking](https://docs.stackhangar.com/get-started/sign-in.md): How to sign in with a passkey, an email code or GitHub, and the difference between a signed-in but locked session and an unlocked vault. ## Vault and passkeys - [The vault](https://docs.stackhangar.com/vault.md): What the vault is, how it is encrypted on your device, and how passkeys and the recovery key open it. - [Unlocking and locking](https://docs.stackhangar.com/vault/unlock.md): How to unlock the vault, how long it stays unlocked across reloads, the idle timeout and 12-hour maximum, and how to lock it. - [Passkeys](https://docs.stackhangar.com/vault/passkeys.md): Add and remove passkeys, why you should have two, and what the passkey check is. - [Recovery key](https://docs.stackhangar.com/vault/recovery-key.md): What the recovery key is, how to save it, how to use it if you lose every passkey, and how to repair or replace it. - [Rotate the vault key](https://docs.stackhangar.com/vault/rotate-vault-key.md): When to rotate the vault key, how to do it, what it protects against, and how to finish an unfinished rotation. - [Export](https://docs.stackhangar.com/vault/export.md): Export everything in your vault to a file on your device, decrypted locally, after a passkey check. Works on any plan. - [What we can and can't see](https://docs.stackhangar.com/vault/what-we-can-see.md): What StackHangar's servers can see, and what they never receive. Secrets are encrypted and decrypted only on your device. ## Projects and items - [Projects and Home](https://docs.stackhangar.com/projects.md): How StackHangar groups your logins, keys, subscriptions and domains by project, and how the Home page ranks what needs attention. - [Create and manage a project](https://docs.stackhangar.com/projects/create-project.md): Create a project, rename it, change its status and environments, retire it with Sunset, or delete it. - [Items](https://docs.stackhangar.com/projects/items.md): The item types StackHangar stores, what each one holds, and how to add, edit, reveal, copy and delete an item. - [Provider accounts](https://docs.stackhangar.com/projects/accounts.md): Record which provider login owns each key, link one account to several projects, and record how you sign in to it. - [Plans, limits and costs](https://docs.stackhangar.com/projects/plans-and-costs.md): Record a provider plan, its limits and price on an account, see what you spend each month on the Costs page, and get renewal reminders. - [Import](https://docs.stackhangar.com/projects/import.md): Add many items at once by pasting a .env file or importing a password manager export, or add a single item by hand. - [Stacks](https://docs.stackhangar.com/projects/stacks.md): Save the services, options and account choices you launch with as a stack, so your next product starts from them. - [History and freeing space](https://docs.stackhangar.com/projects/history.md): See and restore earlier versions of an item, project or account from the last 30 days, and free up space if your history fills up. - [Capture a key from the browser](https://docs.stackhangar.com/projects/capture.md): Save a key you select on a provider's page into your vault, using the StackHangar browser extension and the Save captured secret page. ## Alerts - [Alerts and findings](https://docs.stackhangar.com/alerts.md): What findings and alerts are in StackHangar, how fixed rules raise them, and where you see them. - [Expiry reminders](https://docs.stackhangar.com/alerts/expiry-reminders.md): When StackHangar emails you about an expiry, renewal or rotation, what the email says, and how to stop reminders for something. - [Findings](https://docs.stackhangar.com/alerts/findings.md): The fixed rules that raise findings in StackHangar, which group each one appears in, and how Home ranks them. - [AI explanations](https://docs.stackhangar.com/alerts/ai-explanations.md): How the optional Explain button works, what StackHangar sends to produce an explanation, what it never sends, and the monthly limits on Free and Solo. ## Business profile - [Business profile](https://docs.stackhangar.com/business.md): Keep your company's legal name, tax numbers and addresses in your vault, ready to copy into provider sign-up forms. - [Add and edit a business](https://docs.stackhangar.com/business/entities.md): Add a business, copy its details into a provider form, link your accounts to it, and delete it. - [Filing dates and reminders](https://docs.stackhangar.com/business/filing-dates.md): Add annual report, franchise tax or renewal dates to a business and get an email 30, 7 and 1 days before, and on the day. - [Business findings](https://docs.stackhangar.com/business/findings.md): The two findings StackHangar raises about a business, a date coming due and an account holding old details, and how to clear them. ## Playbooks - [Playbooks](https://docs.stackhangar.com/playbooks.md): Playbooks are step-by-step checklists for launching a product, rotating a key, handling a leak and shutting a project down. - [Launch](https://docs.stackhangar.com/playbooks/launch.md): Set up a new product in StackHangar: pick services and accounts, then work through the steps that create items, send values and add DNS records. - [Rotate or renew](https://docs.stackhangar.com/playbooks/rotate-a-key.md): Replace a key, password, database credential or certificate, or renew a domain, subscription or membership, one step at a time. - [Leaked key](https://docs.stackhangar.com/playbooks/leaked-key.md): Replace a key or password that may have been exposed, revoke the old one right away and check the provider for misuse. - [Sunset a project](https://docs.stackhangar.com/playbooks/sunset-a-product.md): Cancel subscriptions, revoke keys, decide what happens to domains and close accounts, then retire the project. - [Runs](https://docs.stackhangar.com/playbooks/runs.md): Find, resume and review your playbook runs: what In progress and History show, how to stop and come back, and how to end or delete a run. - [Deploy targets](https://docs.stackhangar.com/playbooks/deploy-targets.md): Send a new key from your browser to a Vercel project, GitHub repository or Netlify site and redeploy it, without the value passing through StackHangar. ## AI agents - [AI agents](https://docs.stackhangar.com/agents.md): What a coding agent can and cannot do in StackHangar. An agent can ask you for keys and propose playbooks. It never receives a value. - [Connect an agent](https://docs.stackhangar.com/agents/connect.md): Connect Claude Code, Cursor or another MCP client to StackHangar, choose which projects it may ask about, and approve it with a passkey. - [Approve a request](https://docs.stackhangar.com/agents/approvals.md): What the approval page shows, how the 10-minute link works, and the difference between an entry request and an access request. - [Let your agent ask for a key](https://docs.stackhangar.com/agents/secret-requests.md): Your coding agent needs an environment variable. You approve once with a passkey, and your browser sends the value straight to Vercel, GitHub or Netlify. - [Playbook proposals](https://docs.stackhangar.com/agents/proposals.md): How an agent proposes a key rotation or leaked-key response, what you approve, and which steps an agent may run. - [Tool reference](https://docs.stackhangar.com/agents/tools.md): Every tool StackHangar's MCP server offers to agents, with parameters, what each returns and what none of them ever returns. - [Manage connected agents](https://docs.stackhangar.com/agents/manage.md): See your connected agents and when they were last used, mark a key an agent has seen, and disconnect an agent without a passkey check. ## Browser extension - [Browser extension](https://docs.stackhangar.com/extension.md): What the StackHangar browser extension does, what it never does, and what it can tell your browser about a provider's site. - [Install and pair the extension](https://docs.stackhangar.com/extension/install.md): Install the StackHangar extension in Chrome, Edge, Brave or Arc and check that it is connected to your open StackHangar tab. - [Capture a key](https://docs.stackhangar.com/extension/capture.md): Save a newly created key from a provider's page into your vault with the extension, and use the toolbar button to see which accounts use a site. ## Connections - [Connections](https://docs.stackhangar.com/connections.md): Connect Stripe, AWS or Polar so StackHangar reads daily revenue or spend and shows it on each project. Needs the Solo plan. - [Provider tokens](https://docs.stackhangar.com/connections/providers.md): How to create the least-privilege token for each provider you can connect: Stripe, AWS and Polar. ## Account and billing - [Your account](https://docs.stackhangar.com/account.md): Plans, billing, Settings, the Activity log and deleting your account. - [Plans - Free and Solo](https://docs.stackhangar.com/account/plans.md): What the Free and Solo plans include, what happens when you hit a Free limit, and what happens if a subscription ends. - [Billing](https://docs.stackhangar.com/account/billing.md): Upgrade to Solo, switch between monthly and yearly, update your card, download invoices and cancel. - [Settings](https://docs.stackhangar.com/account/settings.md): A tour of the Settings page, section by section, with links to the pages that cover each task in detail. - [Activity log](https://docs.stackhangar.com/account/activity.md): See sign-ins, unlocks, passkey and recovery changes, agent actions and billing events on your account for the past year. - [Delete your account](https://docs.stackhangar.com/account/delete-account.md): Permanently delete your StackHangar account, vault, passkeys and alerts, and cancel any subscription. ## Reference - [Troubleshooting](https://docs.stackhangar.com/reference/troubleshooting.md): Messages you may see in StackHangar, what they mean and what to do, from passkey problems to expired approval links and plan limits. - [Glossary](https://docs.stackhangar.com/reference/glossary.md): The terms StackHangar uses in the app and in these docs, in plain words. - [Providers](https://docs.stackhangar.com/reference/providers.md): What the StackHangar provider catalog is, what it gives each item, and what happens for a provider that is not listed. - [FAQ](https://docs.stackhangar.com/reference/faq.md): Short answers about using StackHangar: what it can see, passkeys, playbooks, agents, browsers and what happens if you stop paying. - [Support](https://docs.stackhangar.com/reference/support.md): How to get help with StackHangar, and what to include in your message. ## What's new - [What's new](https://docs.stackhangar.com/whats-new.md): Changes to StackHangar that you can see or use, newest first.