---
title: aggregate
sidebarTitle: aggregate
---

# `fastmcp.server.providers.aggregate`


AggregateProvider for combining multiple providers into one.

This module provides `AggregateProvider`, a utility class that presents
multiple providers as a single unified provider. Useful when you want to
combine custom providers without creating a full FastMCP server.

Example:
    ```python
    from fastmcp.server.providers import AggregateProvider

    # Combine multiple providers into one
    combined = AggregateProvider()
    combined.add_provider(provider1)
    combined.add_provider(provider2, namespace="api")  # Tools become "api_foo"

    # Use like any other provider
    tools = await combined.list_tools()
    ```


## Classes

### `AggregateProvider` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/providers/aggregate.py#L46" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>


Utility provider that combines multiple providers into one.

Components are aggregated from all providers. For get_* operations,
providers are queried in parallel and the highest version is returned.

When adding providers with a namespace, wrap_transform() is used to apply
the Namespace transform. This means namespace transformation is handled
by the wrapped provider, not by AggregateProvider.

Errors from individual providers are logged and skipped (graceful degradation).


**Methods:**

#### `add_provider` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/providers/aggregate.py#L78" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
add_provider(self, provider: Provider) -> None
```

Add a provider with optional namespace.

If the provider is a FastMCP server, it's automatically wrapped in
FastMCPProvider to ensure middleware is invoked correctly.

**Args:**
- `provider`: The provider to add.
- `namespace`: Optional namespace prefix. When set\:
- Tools become "namespace_toolname"
- Resources become "protocol\://namespace/path"
- Prompts become "namespace_promptname"


#### `get_tasks` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/providers/aggregate.py#L243" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
get_tasks(self) -> Sequence[FastMCPComponent]
```

Get all task-eligible components from all providers.


#### `lifespan` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/server/providers/aggregate.py#L256" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
lifespan(self) -> AsyncIterator[None]
```

Combine lifespans of all providers.

