For AI agents: a documentation index is available at the root level at /llms.txt. Append /llms.txt to any URL for a page-level index, or .md for the markdown version of any page.
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HomeGuidesAPI reference
HomeGuidesAPI reference
  • Get started
    • Quickstart—Verify a Business
    • Quickstart—Register an entity for payroll taxes
    • Learn how Middesk works
    • Security
    • Changelog
  • Build with Middesk
    • Get your API keys
    • Understand API changes
    • Status codes and errors reference
    • Implement webhooks
    • Secure webhooks
    • Use GraphQL
    • Connect MCP
  • Verify a business (KYB)
    • Verify TIN
    • Verify name and address
    • Verify Secretary of State status
    • Verify owners and officers
    • Screen for sanctions and watchlists
    • Search for adverse media
    • Search for Politically Exposed Persons
    • Implement KYC
    • Discover connections
    • Evaluate online presence
    • Assess credit risk
    • Accelerate onboarding
    • Monitor business activity
    • Manage business entities
    • Work with agents
      • Run agents
      • Stream run events
      • Take action
      • Interrupt policy
      • Webhook events
  • Quickstart—Verify a Business
  • Quickstart—Register an entity for payroll taxes
  • Learn how Middesk works
  • Lifecycle of a Business
  • How Middesk matches data
  • Review insights
  • Use rulesets or policies
  • Create orders
  • Use the sandbox and production environments
  • Use the enhanced sandbox
  • Security
  • Use single sign-on (SSO)
  • Enable directory sync
  • Security certifications, frameworks, and principles
  • Changelog
  • April 27, 2026
  • March 5, 2026
  • February 18, 2026
  • December 18, 2025
  • December 4, 2025
  • Build with Middesk
  • Get your API keys
  • Understand API changes
  • Status codes and errors reference
  • Implement webhooks
  • Secure webhooks
  • Use GraphQL
  • Connect MCP
  • Verify a business (KYB)
  • Verify TIN
  • Monitor TINs for newly formed businesses
  • TIN review tasks
  • Verify name and address
  • Name and address review tasks
  • Verify Secretary of State status
  • Secretary of State review tasks
  • Verify owners and officers
  • People review tasks
  • Screen for sanctions and watchlists
  • Search for adverse media
  • Search for Politically Exposed Persons
  • Implement KYC
  • Discover connections
  • Evaluate online presence
  • Analyze web presence
  • Web analysis review tasks
  • Verify business industry classification
  • Classification object
  • Prohibited categories
  • Industry classification review tasks
  • Evaluate email risk
  • Email risk review tasks
  • Assess credit risk
  • Search for liens
  • File and terminate a lien
  • Research legal records
  • Accelerate onboarding
  • How Signal works
  • Score a business profile
  • Reason codes
  • Integrate the Autocomplete API
  • Integrate the Smart Populate API
  • Create a Business Enrichment order
  • Monitor business activity
  • How Monitoring works
  • Monitor business names
  • Monitor people
  • Monitor status
  • Monitor watchlist hits
  • Monitor bankruptcies
  • Monitor liens
  • Retrieve the business timeline
  • Webhook events
  • Manage business entities
  • Learn the registration lifecycle
  • Register an entity for payroll taxes
  • Configure webhooks for entity management
  • Invite employers
  • Registration items labels and keys
  • Optional parameters for registration requests
  • Tax registration items
  • Jurisdiction registration status
  • Partner integration endpoints
  • Sandbox guide
  • Work with agents
  • Run agents
  • Stream run events
  • Take action
  • Interrupt policy
  • Webhook events
Contact SalesGet Support

Work with agents

Work with agents to deepen business intelligence and take action.
Run agents

Incorporate agents into workflows to add expansive capabilities.

Stream run events

Stream real-time events from agent runs using Server-Sent Events.

Take action

Drive meaningful action based on agent findings and recommendations.

Interrupt policy

Control which agent interrupts pause for review and which auto-proceed.

Get a demo
Contact your account manager or contact sales to inquire about access.
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