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
  • Get started
    • Quickstart—Verify a Business
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    • Get your API keys
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    • Status codes and errors reference
    • Implement webhooks
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  • 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
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    • Implement KYC
    • Discover connections
    • Evaluate online presence
    • Assess credit risk
    • Accelerate onboarding
    • Monitor business activity
    • Manage business entities
    • Work with agents
  • 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
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Changelog

Apr 27, 2026

API

Deprecated: orders[].package field The orders[].package field is deprecated in favor of orders[].product. Requests that include orders[].package will continue to work but will return a deprecation…

Mar 5, 2026

Dashboard

Enhanced Sandbox Preview New enhanced sandbox mode available in Technology Preview. Define custom test businesses and use pre-built scenario templates to simulate specific verification outcomes…

Feb 18, 2026

Agents

Agents API New API to retrieve specific agent details or a list of available agents on your account. Each agent has a defined type and set of capabilities for resolving business verification signals.…

Dec 18, 2025

Onboarding

Autocomplete API New Autocomplete API returns real-time, structured business suggestions based on partial name input—including names, addresses, people, and entity type. Integrate directly into your…

Dec 4, 2025

API

GraphQL Preview New GraphQL API available in Technology Preview. Query business verification data with nested relationships in a single request, reducing typical workflows from 3-5 sequential calls…

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