# tZERO Custody Assets API

**Canonical:** https://apis.io/apis/tzero/tzero-custody-assets-api/  
**Provider:** tZERO — https://apis.io/providers/tzero/  
**Base URL:** https://gateway-web-api.tzero.com/app  
**Documentation:** https://apidocs.tzero.com/docs/explorer

tZERO Custody Assets API is one of 29 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 Custody Assets. The published artifact set on APIs.io includes an OpenAPI specification, API documentation, and an API reference.

Supported assets, address validation, and fee estimation (live)

## Operations (3)

| Method | Path | Summary |
|---|---|---|
| GET | `/api/v1/custody/supported-assets` | List supported assets |
| POST | `/api/v1/custody/validate-address` | Validate an address |
| GET | `/api/v1/custody/estimate-fee/{assetId}` | Estimate network fee |

## Machine-readable artifacts (4)

- **OpenAPI** — https://raw.githubusercontent.com/api-evangelist/tzero/refs/heads/main/openapi/tzero-custody-assets-api-openapi.yml
- **Documentation** — https://apidocs.tzero.com/docs
- **APIReference** — https://apidocs.tzero.com/docs/explorer
- **APIReference** — https://api.t0direct.com/api/v1/docs/

## Other tZERO APIs (12)

- [tZERO FIX API](https://apis.io/apis/tzero/fix/)
- [tZERO Authorization API](https://apis.io/apis/tzero/tzero-authorization-api/)
- [tZERO Balance API](https://apis.io/apis/tzero/tzero-balance-api/)
- [tZERO Bank Accounts API](https://apis.io/apis/tzero/tzero-bank-accounts-api/)
- [tZERO Corporate Actions API](https://apis.io/apis/tzero/tzero-corporate-actions-api/)
- [tZERO Custody Accounts API](https://apis.io/apis/tzero/tzero-custody-accounts-api/)
- [tZERO Custody Transfers API](https://apis.io/apis/tzero/tzero-custody-transfers-api/)
- [tZERO Deployments API](https://apis.io/apis/tzero/tzero-deployments-api/)
- [tZERO Dividends API](https://apis.io/apis/tzero/tzero-dividends-api/)
- [tZERO Documents API](https://apis.io/apis/tzero/tzero-documents-api/)
- [tZERO Investments API](https://apis.io/apis/tzero/tzero-investments-api/)
- [tZERO Investor Accounts API](https://apis.io/apis/tzero/tzero-investoraccounts-api/)

## Tags

Custody Assets

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