Every action below is available as an MCP tool and a verb in Cerebral OS — callable from any AI agent, Claude, Cursor, Windsurf, or your own runtime via the BYOA API. All executions are governed, audited, and dry-run safe.
Cancel Check
postgrid:cancel_check
Cancel a check that hasn't been processed yet.
Write
High risk
Cancel Letter
postgrid:cancel_letter
Cancel a letter that hasn't been processed yet.
Write
High risk
Cancel Postcard
postgrid:cancel_postcard
Cancel a postcard that hasn't been processed yet.
Write
High risk
Create Check
postgrid:create_check
Create and send a check via PostGrid's mail service.
Write
Medium risk
Create Letter
postgrid:create_letter
Create and send a letter via PostGrid's mail service.
Write
Medium risk
Create Postcard
postgrid:create_postcard
Create and send a postcard via PostGrid's mail service.
Write
Medium risk
Get Check
postgrid:get_check
Fetch a single check by ID with status and payment information.
Read
Low risk
Get Letter
postgrid:get_letter
Fetch a single letter by ID with status and tracking information.
Read
Low risk
Get Postcard
postgrid:get_postcard
Fetch a single postcard by ID with status and tracking information.
Read
Low risk
List Bank Accounts
postgrid:list_bank_accounts
List bank accounts available for check creation.
Read
Low risk
List Checks
postgrid:list_checks
List checks with optional filtering and pagination.
Read
Low risk
List Letters
postgrid:list_letters
List letters with optional filtering and pagination.
Read
Low risk
List Postcards
postgrid:list_postcards
List postcards with optional filtering and pagination.
Read
Low risk
Verify Address
postgrid:verify_address
Verify and standardize a mailing address using PostGrid's address verification service.
Write
Medium risk
Verify Bank Account
postgrid:verify_bank_account
Verify a bank account's routing and account numbers for check creation.
Write
Medium risk