aid: tzero
name: tZERO
description: 'tZERO Technologies is a US financial-technology company building regulated infrastructure
  for tokenized real-world assets and digital securities. Through its SEC- and FINRA-regulated broker-dealer,
  Alternative Trading System (tZERO ATS, continuously operating since 2019), special purpose broker-dealer
  for digital custody, and SEC-registered transfer agent, tZERO covers the full lifecycle: capital formation
  and token issuance, secondary trading and market data, clearance and settlement, cap-table recordkeeping,
  corporate actions, dividends and proxy voting. Its developer surface — marketed as tZERO Connect — publishes
  two public OpenAPI 3.0.3 contracts (an Issuance & Secondary Markets REST API on gateway-web-api.tzero.com
  and an Institutional transfer-agent / tokenization / custody API on api.t0direct.com) alongside FIX
  4.2 / 4.4 specifications for order entry, drop copy and market data.'
url: https://raw.githubusercontent.com/api-evangelist/tzero/refs/heads/main/apis.yml
image: https://tzero.com/api/sanity-assets/images/jpd7ydtd/pre-prod/bcb9e8e2a5c5bf41d9938781a368d92635b0923a-595x156.svg?w=1200&h=627&fit=crop&auto=format
x-type: company
x-source: harvest:secondary-market
specificationVersion: '0.20'
created: '2026-09-01'
modified: '2026-09-01'
tags:
- Company
- Digital Securities
- Tokenization
- Capital Markets
- Trading
- Alternative Trading System
- Transfer Agent
- Custody
- Blockchain
- Financial Services
- Securities
- Market Data
- FIX Protocol
apis:
- aid: tzero:issuance-secondary-markets
  name: tZERO Issuance & Secondary Markets API
  description: REST/JSON API for creating individual broker-dealer accounts, triggering and reviewing
    KYC on investors, browsing primary offerings and managing investments, linking bank accounts and moving
    funds, reading balances, retrieving market schedules and public price history/snapshots, and placing,
    listing and cancelling orders on the tZERO ATS. Authenticated with an x-apikey header plus a bearer
    JWT obtained from POST /auth/v1/api/token.
  humanURL: https://apidocs.tzero.com/docs/explorer
  baseURL: https://gateway-web-api.tzero.com/app
  tags:
  - Trading
  - Onboarding
  - KYC
  - Investments
  - Market Data
  properties:
  - type: OpenAPI
    url: openapi/tzero-issuance-secondary-markets-openapi.json
  - type: Documentation
    url: https://apidocs.tzero.com/docs
  - type: APIReference
    url: https://apidocs.tzero.com/docs/explorer
- aid: tzero:institutional
  name: tZERO Institutional API
  description: 'REST/JSON API giving institutional issuers and partners programmatic access to tZERO transfer-agent,
    tokenization and custody operations: investors and holdings, securities and cap tables, book-entry
    transfers, issuance requests, documents, dividends, corporate actions, voting proposals, settlement
    instructions, omnibus investor accounts, token deployments, custody vaults/whitelists, and HMAC-signed
    webhooks. Authenticated with an X-API-Key header carrying scoped permissions.'
  humanURL: https://apidocs.tzero.com/docs/institutional
  baseURL: https://api.t0direct.com/api/v1
  tags:
  - Transfer Agent
  - Tokenization
  - Custody
  - Corporate Actions
  - Webhooks
  properties:
  - type: OpenAPI
    url: openapi/tzero-institutional-openapi.json
  - type: APIReference
    url: https://api.t0direct.com/api/v1/docs/
- aid: tzero:fix
  name: tZERO FIX API
  description: FIX 4.2 / 4.4 protocol surface for low-latency order entry, drop-copy execution reports,
    market data (snapshot and incremental refresh, trading session status, security status) and Indication
    of Interest (IOI) market data against the tZERO ATS. Message-by-message specifications are published
    on the tZERO API docs site; session credentials and connectivity are arranged with tZERO.
  humanURL: https://apidocs.tzero.com/docs/fix
  tags:
  - FIX Protocol
  - Order Entry
  - Market Data
  - Drop Copy
  properties:
  - type: Documentation
    url: https://apidocs.tzero.com/docs/fix
  x-transport: FIX 4.2 / 4.4 over TCP; session host, port, CompIDs and credentials are arranged with tZERO
    and are not published
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: AgenticAccess
  url: agentic-access/tzero-agentic-access.yml
- type: DomainSecurity
  url: security/tzero-domain-security.yml
- type: Authentication
  url: authentication/tzero-authentication.yml
- type: Website
  url: https://www.tzero.com/
- type: DeveloperPortal
  url: https://apidocs.tzero.com/docs
- type: Documentation
  url: https://apidocs.tzero.com/docs
- type: APIReference
  url: https://apidocs.tzero.com/docs/explorer
- type: GettingStarted
  url: https://apidocs.tzero.com/docs
- type: Support
  url: https://www.tzero.com/contact
- type: Blog
  url: https://www.tzero.com/content-hub
- type: GitHubOrganization
  url: https://github.com/tZERO-dev
- type: SignUp
  url: https://platform.tzero.com/tzero/register
- type: Login
  url: https://platform.tzero.com/tzero/auth
- type: TermsOfService
  url: https://storage.googleapis.com/public-disclosures.tzero.com/tZERO_MasterTermsofUse.pdf
- type: PrivacyPolicy
  url: https://storage.googleapis.com/public-disclosures.tzero.com/Privacy-Policy-and-Privacy-Notices-(TDAS-and-tZERO-Securities).pdf
- type: LegalHub
  url: https://www.tzero.com/legal
- type: Company
  url: https://www.tzero.com/company
- type: Careers
  url: https://www.tzero.com/careers
- type: LinkedIn
  url: https://www.linkedin.com/company/tzero/
- type: X
  url: https://x.com/tZERO
- type: Conventions
  url: conventions/tzero-conventions.yml
- type: Idempotency
  url: conventions/tzero-conventions.yml
- type: ErrorCatalog
  url: errors/tzero-problem-types.yml
- type: ErrorCodes
  url: errors/tzero-error-codes.yml
- type: Lifecycle
  url: lifecycle/tzero-lifecycle.yml
- type: ChangeLog
  url: changelog/tzero-changelog.yml
- type: Conformance
  url: conformance/tzero-conformance.yml
- type: Compliance
  url: https://www.tzero.com/legal
- type: DataModel
  url: data-model/tzero-data-model.yml
- type: Webhooks
  url: asyncapi/tzero-institutional-webhooks.yml
- type: AgentSkill
  url: skills/_index.yml
- type: LLMsTxt
  url: llms/tzero-llms.txt
- type: Packages
  url: packages/tzero-packages.yml
- type: Plans
  url: plans/tzero-plans-pricing.yml
- type: RateLimits
  url: rate-limits/tzero-rate-limits.yml
- type: Overlay
  url: overlays/tzero-issuance-secondary-markets-overlay.yaml
- type: Overlay
  url: overlays/tzero-institutional-overlay.yaml
x-enrichment:
  date: '2026-09-01'
  status: enriched
  artifacts_added: 27
  pass: local-v1