# Introduction

> Entry point to the B2B2X developer portal — covers concepts, workflows, API Kickstart, and the full API Reference.

Source: https://business-api-docs.youhodler.com/docs/intro

**Built for teams that move money for others**

Run tenant perimeters, downstream clients, account-scoped execution, and governed approvals through one public API. Start with the section that matches the integration job in front of your team.

## Base URL

**Sandbox**

```
https://b2b2x-sandbox.youhodler.com/api
```

**Production**

```
https://business-api.youhodler.com
```

## Explore The Portal

### Concepts

Learn the platform model before you dive into execution. This section explains typed refs, account boundaries, operation structure, governed execution, and delivery surfaces.

- [TopologyRef vs AccountRef](/docs/concepts/topology-and-refs#topologyref)
- [Balance reads](/docs/concepts/accounts#balance-reads)
- [Operation model](/docs/concepts/operations#mental-model)
- [Policies and approvals](/docs/concepts/policies-and-approvals#what-belongs-here)

[View all →](/docs/category/concepts)
### Workflows

Read the public API in operational order. These guides connect perimeter setup, distribution, execution, settlement, and suspension into coherent integration sequences.

- [Activation and setup](/docs/workflows/activation-and-setup#operational-sequence)
- [Distribution and liquidity](/docs/workflows/distribution-and-liquidity#operational-sequence)
- [Live operations](/docs/workflows/live-operations-and-controls#operational-sequence)
- [Settlement and suspension](/docs/workflows/settlement-and-suspension#operational-sequence)

[View all →](/docs/category/workflows)
### API Kickstart

Use grouped API family pages when you already know the model and want request and response shapes organized into readable operational clusters.

- [Access and topology](/docs/reference/access-and-topology#access-and-perimeter)
- [Actors and control](/docs/reference/actors-and-access-control#principals-scope-and-control)
- [Clients and accounts](/docs/reference/clients-and-accounts#downstream-perimeter-and-liquidity)
- [Operations](/docs/reference/operations#preview-and-execute)

[View all →](/docs/reference)