list_models
Retrieve available AI models in a Langfuse project to analyze usage, costs, and performance across different models.
Instructions
List all available AI models in the Langfuse project.
Input Schema
TableJSON Schema
| Name | Required | Description | Default |
|---|---|---|---|
| limit | No | Maximum number of models to return (default: 50) | |
| page | No | Page number for pagination |
Implementation Reference
- src/tools/list-models.ts:11-38 (handler)The main handler function that executes the list_models tool logic. It invokes the client's listModels method with provided arguments, formats the response as JSON text content, and handles errors appropriately.
export async function listModels( client: LangfuseAnalyticsClient, args: ListModelsArgs = {} ) { try { const modelsData = await client.listModels(args); return { content: [ { type: 'text' as const, text: JSON.stringify(modelsData, null, 2), }, ], }; } catch (error) { const errorMessage = error instanceof Error ? error.message : String(error); return { content: [ { type: 'text' as const, text: `Error listing models: ${errorMessage}`, }, ], isError: true, }; } } - src/tools/list-models.ts:4-7 (schema)Zod schema defining the input parameters for the list_models tool: optional limit and page for pagination.
export const listModelsSchema = z.object({ limit: z.number().optional().describe('Maximum number of models to return (default: 50)'), page: z.number().optional().describe('Page number for pagination'), }); - src/index.ts:548-564 (registration)Tool registration in the allTools array used by listToolsRequestHandler, defining the name, description, and inputSchema for list_models.
{ name: 'list_models', description: 'List all available AI models in the Langfuse project.', inputSchema: { type: 'object', properties: { limit: { type: 'number', description: 'Maximum number of models to return (default: 50)', }, page: { type: 'number', description: 'Page number for pagination', }, }, }, }, - src/index.ts:1072-1075 (registration)Dispatch case in the CallToolRequestSchema handler that parses arguments using the schema and invokes the listModels handler function.
case 'list_models': { const args = listModelsSchema.parse(request.params.arguments); return await listModels(this.client, args); } - src/langfuse-client.ts:288-312 (helper)Underlying client method that makes the HTTP request to Langfuse API /api/public/models to fetch the list of models, used by the tool handler.
async listModels(params: { limit?: number; page?: number; }): Promise<any> { const queryParams = new URLSearchParams(); if (params.limit) queryParams.append('limit', params.limit.toString()); if (params.page) queryParams.append('page', params.page.toString()); const authHeader = 'Basic ' + Buffer.from( `${this.config.publicKey}:${this.config.secretKey}` ).toString('base64'); const response = await fetch(`${this.config.baseUrl}/api/public/models?${queryParams}`, { headers: { 'Authorization': authHeader, }, }); if (!response.ok) { await this.handleApiError(response, 'List Models'); } return await response.json(); }