# tZERO Institutional API

**Canonical:** https://apis.io/apis/tzero/institutional/  
**Provider:** tZERO — https://apis.io/providers/tzero/  
**Base URL:** https://api.t0direct.com/api/v1  
**Documentation:** https://apidocs.tzero.com/docs/institutional

tZERO Institutional API is one of 3 APIs that [tZERO](https://apis.io/providers/tzero/) publishes on the [APIs.io](https://apis.io/) network, described by a machine-readable OpenAPI specification. Tagged areas include Transfer Agent, Tokenization, Custody, Corporate Actions, and Webhooks. The published artifact set on APIs.io includes an OpenAPI specification and an API reference.

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.

## Machine-readable artifacts (2)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/tzero/refs/heads/main/openapi/tzero-institutional-openapi.json
- **APIReference** — https://api.t0direct.com/api/v1/docs/

## Other tZERO APIs (2)

- [tZERO Issuance & Secondary Markets API](https://apis.io/apis/tzero/issuance-secondary-markets/)
- [tZERO FIX API](https://apis.io/apis/tzero/fix/)

## Tags

Transfer Agent, Tokenization, Custody, Corporate Actions, Webhooks

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/apis/tzero/institutional/). The API's provider profile, Kin Score and agent-readiness rating are at https://apis.io/providers/tzero/.