1Password Credential Lookup

CRITICAL: Use URL, Not Item Names

WRONG:

get_credential(item_name="github.com")  ← NEVER DO THIS
get_credential(item_name="GitHub")      ← NEVER DO THIS

RIGHT:

find_credential(url="github.com")                           ← CORRECT
find_credential(url="github.com", username="clementwalter") ← EVEN BETTER

The One Rule

When logging into a website, use find_credential with the domain.

1Password items have arbitrary names that don't match URLs. The find_credential tool searches by the URL field stored in 1Password, which matches the website you're visiting.

Tools (in order of preference)

1. find_credential - PRIMARY TOOL

Use this for ALL credential lookups:

find_credential(url="github.com")
find_credential(url="linkedin.com", username="clement@example.com")

Parameters:

• url (required): Domain of website (e.g., "github.com", "twitter.com")
• username (optional): Filter by username when multiple accounts exist

Returns:

• Single match: {"username": "...", "password": "...", "item_name": "..."}
• Multiple matches: List of accounts to choose from
• No match: Error message

2. list_items_for_url - When unsure which account

list_items_for_url(url="github.com")

Shows all accounts for a domain with usernames. Use before find_credential if you don't know which account to use.

3. get_credential - RARELY NEEDED

Only use if you have an exact item ID (like ct2jszznlzlp7r7jeb53rhy5li). Never pass URLs or guessed names.

Workflow Example

When logging into github.com:

# Step 1: Get credentials for the domain
find_credential(url="github.com", username="clementwalter")

# If multiple accounts and no username filter:
# → Returns list: [{"username": "work@company.com"}, {"username": "personal@gmail.com"}]
# → Pick one and retry with username filter

# Step 2: Use returned credentials to fill login form

Domain Aliases

These domains are treated as equivalent:

• x.com ↔ twitter.com

Error Handling

Error	Solution
"No items found"	Check domain spelling
"Multiple items found"	Add username parameter to filter
"op CLI not installed"	User needs 1Password CLI
"Timed out"	User needs to run op signin

Anti-Patterns

NEVER do these:

• get_credential(item_name="github.com") - URL is not an item name
• get_credential(item_name="GitHub") - Guessed names don't work
• get_credential(item_name="my github") - Item names are arbitrary

ALWAYS do this:

• find_credential(url="github.com") - Search by the website URL