1Password Credential Lookup

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="[email protected]")

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": "[email protected]"}, {"username": "[email protected]"}]
# → 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

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