Schema | 1Password MCP Server

1Password MCP Server

Describes the environment variables required to run the server.

Name	Required	Description
`OP_KEYCHAIN_ACCOUNT`	No	The Keychain account name (optional, macOS only)
`OP_KEYCHAIN_SERVICE`	No	The Keychain service name to retrieve the token from (macOS only)
`OP_SERVICE_ACCOUNT_TOKEN`	No	Your 1Password Service Account token

Features and capabilities supported by this server

Functions exposed to the LLM to take actions

Name	Description
vault_listA	List all 1Password vaults accessible to the service account. Returns vault IDs, names, descriptions, and types.
item_lookupA	Search for items within a 1Password vault by title substring. Returns item IDs, titles, categories, and vault IDs.
item_deleteA	Permanently delete an item from a 1Password vault. This action cannot be undone.
password_createA	Create a new password/login item in a 1Password vault with optional username, URL, tags, and notes.
password_readA	Retrieve a secret from 1Password using either a secret reference (op://vault/item/field) or vault ID + item ID. Supports field selection and optional value reveal.
password_updateA	Update (rotate) a password or concealed field on an existing 1Password item. If the target field does not exist, it will be created.
password_generateA	Generate a cryptographically secure random password with configurable length and character types. Uses rejection sampling for unbiased randomness.
password_generate_memorableA	Generate a memorable passphrase from random dictionary words with optional number and symbol suffixes. Uses a ~500-word curated list for good entropy.

Interactive templates invoked by user choice

Name	Description
`generate-secure-password`	Guide through generating a secure password with specific requirements
`credential-rotation`	Step-by-step workflow for rotating a credential stored in 1Password
`vault-audit`	Audit the contents of a 1Password vault — list all items with categories and metadata
`secret-reference-helper`	Help construct an op://vault/item/field secret reference from vault and item names

Contextual data attached and managed by the client

Name	Description
`server-config`	Current 1Password MCP server configuration (non-secret values only).
`vault-list`	List of all 1Password vaults accessible to the service account.
`vault-items`	List of items within a specific 1Password vault (metadata only, no secrets).

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