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jlowin merged 2 commits into from
Feb 12, 2026
Merged

fix: guard client pagination loops against misbehaving servers #3167

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b09e936
fix: guard client pagination loops against misbehaving servers
jlowin Feb 12, 2026
f8b2d91
chore: Update SDK documentation
marvin-context-protocol[bot] Feb 12, 2026
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8 changes: 4 additions & 4 deletions docs/python-sdk/fastmcp-client-mixins-prompts.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ large result sets incrementally), use list_prompts_mcp() with the cursor paramet
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `get_prompt_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L84" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `get_prompt_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L92" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
get_prompt_mcp(self: Client, name: str, arguments: dict[str, Any] | None = None, meta: dict[str, Any] | None = None) -> mcp.types.GetPromptResult
Expand All @@ -80,19 +80,19 @@ containing the prompt messages and any additional metadata.
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L153" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L161" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
get_prompt(self: Client, name: str, arguments: dict[str, Any] | None = None) -> mcp.types.GetPromptResult
```

#### `get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L164" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L172" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
get_prompt(self: Client, name: str, arguments: dict[str, Any] | None = None) -> PromptTask
```

#### `get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L176" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `get_prompt` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/prompts.py#L184" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
get_prompt(self: Client, name: str, arguments: dict[str, Any] | None = None) -> mcp.types.GetPromptResult | PromptTask
Expand Down
12 changes: 6 additions & 6 deletions docs/python-sdk/fastmcp-client-mixins-resources.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ large result sets incrementally), use list_resources_mcp() with the cursor param
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `list_resource_templates_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L82" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `list_resource_templates_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L90" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
list_resource_templates_mcp(self: Client) -> mcp.types.ListResourceTemplatesResult
Expand All @@ -78,7 +78,7 @@ containing the list of resource templates and any additional metadata.
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `list_resource_templates` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L105" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `list_resource_templates` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L113" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
list_resource_templates(self: Client) -> list[mcp.types.ResourceTemplate]
Expand All @@ -99,7 +99,7 @@ cursor parameter.
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `read_resource_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L132" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `read_resource_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L149" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
read_resource_mcp(self: Client, uri: AnyUrl | str, meta: dict[str, Any] | None = None) -> mcp.types.ReadResourceResult
Expand All @@ -120,19 +120,19 @@ containing the resource contents and any additional metadata.
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L188" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L205" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
read_resource(self: Client, uri: AnyUrl | str) -> list[mcp.types.TextResourceContents | mcp.types.BlobResourceContents]
```

#### `read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L198" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L215" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
read_resource(self: Client, uri: AnyUrl | str) -> ResourceTask
```

#### `read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L209" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `read_resource` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/resources.py#L226" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
read_resource(self: Client, uri: AnyUrl | str) -> list[mcp.types.TextResourceContents | mcp.types.BlobResourceContents] | ResourceTask
Expand Down
8 changes: 4 additions & 4 deletions docs/python-sdk/fastmcp-client-mixins-tools.mdx
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Original file line number Diff line number Diff line change
Expand Up @@ -58,7 +58,7 @@ large result sets incrementally), use list_tools_mcp() with the cursor parameter
- `McpError`: If the request results in a TimeoutError | JSONRPCError


#### `call_tool_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L88" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `call_tool_mcp` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L96" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
call_tool_mcp(self: Client, name: str, arguments: dict[str, Any], progress_handler: ProgressHandler | None = None, timeout: datetime.timedelta | float | int | None = None, meta: dict[str, Any] | None = None) -> mcp.types.CallToolResult
Expand Down Expand Up @@ -88,19 +88,19 @@ containing the tool result and any additional metadata.
- `McpError`: If the tool call requests results in a TimeoutError | JSONRPCError


#### `call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L168" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L176" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
call_tool(self: Client, name: str, arguments: dict[str, Any] | None = None) -> CallToolResult
```

#### `call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L182" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L190" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
call_tool(self: Client, name: str, arguments: dict[str, Any] | None = None) -> ToolTask
```

#### `call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L197" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>
#### `call_tool` <sup><a href="https://github.com/jlowin/fastmcp/blob/main/src/fastmcp/client/mixins/tools.py#L205" target="_blank"><Icon icon="github" style="width: 14px; height: 14px;" /></a></sup>

```python
call_tool(self: Client, name: str, arguments: dict[str, Any] | None = None) -> CallToolResult | ToolTask
Expand Down
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