openapi: 3.1.0 info: title: Mastra Server REST Agents Conversations API version: v1 description: 'REST routes exposed by a Mastra server for agents, workflows, tools, memory, vectors, MCP servers, the Responses API, the Conversations API, and observability (logs and telemetry traces). ' contact: name: Mastra url: https://mastra.ai servers: - url: http://localhost:4111 description: Default local Mastra dev server - url: https://{host} description: Self-hosted or Mastra Cloud deployment variables: host: default: your-mastra-host.example.com security: - BearerAuth: [] tags: - name: Conversations paths: /api/v1/conversations: post: summary: Create a conversation (Conversations API) operationId: createConversation requestBody: required: true content: application/json: schema: type: object responses: '200': description: Conversation created. tags: - Conversations /api/v1/conversations/{conversationId}: get: summary: Retrieve a conversation operationId: getConversation parameters: - in: path name: conversationId required: true schema: type: string responses: '200': description: Conversation details. tags: - Conversations /api/v1/conversations/{conversationId}/items: get: summary: List items in a conversation operationId: listConversationItems parameters: - in: path name: conversationId required: true schema: type: string responses: '200': description: Items. tags: - Conversations components: securitySchemes: BearerAuth: type: http scheme: bearer description: 'Mastra API key passed as `Authorization: Bearer {api_key}`. Local dev servers may not require authentication. '