instances: - url: https://letta.docs.buildwithfern.com custom-domain: https://docs.letta.com title: Letta default-language: typescript experimental: openapi-parser-v3: true tabs: docs: display-name: Documentation slug: documentation ade: display-name: ADE Guide slug: ade cloud: display-name: Letta Cloud skip-slug: true selfhosted: display-name: Self-Hosting skip-slug: true ref: display-name: API Reference skip-slug: true cookbooks: display-name: Cookbooks icon: fa-sharp fa-light fa-books skip-slug: true github: display-name: GitHub icon: fa-brands fa-github href: https://github.com/letta-ai/letta discord: display-name: Discord icon: fa-brands fa-discord href: https://discord.gg/letta community: display-name: Developer Community icon: fa-sharp fa-light fa-user-astronaut skip-slug: true install: display-name: Download icon: fa-sharp fa-light fa-download skip-slug: true showcase: display-name: Examples skip-slug: true leaderboard: display-name: Leaderboard skip-slug: true evals: display-name: Evals slug: evals landing-page: page: home path: pages/index.mdx navigation: - tab: docs layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: Get Started contents: - page: Letta Overview path: pages/getting-started/letta_platform.mdx - page: Quickstart path: pages/getting-started/quickstart.mdx - page: Core Concepts path: pages/getting-started/core-concepts.mdx - page: Prompts for Vibecoding path: pages/getting-started/prompts.mdx #- section: Supported Frameworks # contents: # - page: TypeScript (Node.js) # path: pages/getting-started/ade.mdx # - page: Python # path: pages/getting-started/ade.mdx # - page: Vercel AI SDK # path: pages/frameworks/vercel.mdx # - page: React # path: pages/frameworks/react.mdx # - page: Next.js # path: pages/frameworks/next.mdx # - page: Flask # path: pages/frameworks/flask.mdx # - page: Mastra # path: pages/frameworks/mastra.mdx - section: Agents contents: - page: Overview path: pages/agents/overview.mdx - page: Context Hierarchy path: pages/agents/context_hierarchy.mdx - page: Message Types path: pages/agents/message_types.mdx - section: Memory path: pages/agents/memory.mdx contents: - page: Memory Blocks path: pages/agents/memory_blocks.mdx - section: Archival Memory path: pages/agents/archival_memory_overview.mdx contents: - page: Searching & Querying path: pages/agents/archival_search.mdx - page: Best Practices path: pages/agents/archival_best_practices.mdx - page: Agentic Context Engineering path: pages/agents/context_engineering.mdx - section: Agent Capabilities contents: - page: Streaming Responses path: pages/agents/streaming.mdx - page: Long-Running Executions path: pages/agents/long_running.mdx - page: JSON Mode & Structured Output path: pages/agents/json_mode.mdx - page: Multi-Modal path: pages/agents/multimodal.mdx - page: Filesystem path: pages/agents/filesystem.mdx - section: Tool Use contents: - page: Overview path: pages/agents/tools.mdx - page: Base Tools path: pages/agents/base_tools.mdx - section: Utilities path: pages/agents/prebuilt_tools.mdx contents: - page: Web Search path: pages/agents/web_search.mdx - page: Code Interpreter path: pages/agents/run_code.mdx - page: Fetch Webpage path: pages/agents/fetch_webpage.mdx - page: Custom Tools path: pages/agents/custom_tools.mdx - page: Tool Rules path: pages/agents/tool_rules.mdx - page: Tool Variables path: pages/agents/tool_variables.mdx - section: Model Context Protocol path: pages/mcp/overview.mdx contents: - page: Connecting Letta to MCP path: pages/mcp/setup.mdx - page: Remote (SSE/HTTP) Servers path: pages/mcp/sse.mdx - page: Local (stdio) Servers path: pages/mcp/stdio.mdx - section: Configuration contents: - page: Multi-User (Identities) path: pages/agents/multiuser.mdx - page: Agent File (.af) path: pages/agents/agentfile.mdx - page: Scheduling path: pages/agents/scheduling.mdx - section: Multi-Agent path: pages/agents/multiagent.mdx contents: - page: Custom Multi-Agent Tools path: pages/agents/multiagent_custom.mdx - page: Multi-Agent Shared Memory path: pages/agents/multiagent_memory.mdx - section: Experimental contents: - page: Groups path: pages/agents/groups.mdx - page: Human-in-the-Loop path: pages/agents/human_in_the_loop.mdx - page: Sleep-time Agents path: pages/agents/sleep_time_agents.mdx - section: Voice Agents path: pages/voice/voice.mdx contents: - page: Connecting to LiveKit Agents path: pages/voice/voice_livekit.mdx - page: Connecting to Vapi path: pages/voice/voice_vapi.mdx - section: Integrations contents: - page: Telegram Bot path: pages/tutorials/telegram_bot.mdx - section: Research Background contents: - page: Letta and MemGPT path: pages/concepts/letta.mdx - page: MemGPT Paper Deep Dive path: pages/concepts/memgpt.mdx - section: Legacy & Migration contents: - page: Legacy Architecture Overview path: pages/legacy/architectures_overview.mdx - page: Migration Guide path: pages/legacy/migration_guide.mdx - page: MemGPT Agents (Legacy) path: pages/legacy/memgpt_agents_legacy.mdx - page: Workflows (Legacy) path: pages/legacy/workflows_legacy.mdx - page: Low-latency Agents (Legacy) path: pages/legacy/low_latency_agents_legacy.mdx - page: ReAct Agents (Legacy) path: pages/legacy/react_agents_legacy.mdx - page: Heartbeats (Legacy) path: pages/legacy/heartbeats_legacy.mdx - page: Architecture Naming History path: pages/legacy/naming_history.mdx #- section: Tool Execution # contents: # - page: Overview # path: pages/tool_execution/overview.mdx # - section: Model Context Protocol # contents: # - page: What is MCP? # path: pages/mcp/overview.mdx # - section: Connecting Letta to MCP # path: pages/mcp/setup.mdx # contents: # - page: Remote (SSE/HTTP) Servers # path: pages/mcp/sse.mdx # - page: Local (stdio) Servers # path: pages/mcp/stdio.mdx #- section: Deploying a Letta Server # contents: # - page: Letta Docker Image # path: pages/server/docker.mdx # - section: Connecting Model Providers # contents: # - page: OpenAI # path: pages/models/openai.mdx # - page: OpenAI proxy # path: pages/models/openai_proxy.mdx # - page: Anthropic # path: pages/models/anthropic.mdx # - page: DeepSeek # path: pages/models/deepseek.mdx # - page: AWS Bedrock # path: pages/models/aws_bedrock.mdx # - page: Groq # path: pages/models/groq.mdx # - page: xAI (Grok) # path: pages/models/xai.mdx # - page: Together # path: pages/models/together.mdx # - page: Google AI / Gemini # path: pages/models/google.mdx # - page: Google Vertex # path: pages/models/google_vertex.mdx # - page: Azure OpenAI # path: pages/models/azure.mdx # - page: Ollama # path: pages/models/ollama.mdx # - page: LM Studio # path: pages/models/lmstudio.mdx # - page: vLLM # path: pages/models/vllm.mdx # - section: Remote Hosting # path: pages/deployment/remote.mdx # contents: # - page: Deploy on Railway # path: pages/deployment/railway.mdx # - section: Alternate Install Methods # contents: # - page: Using pip # path: pages/server/pip.mdx # - page: Installing from Source # path: pages/server/source.mdx #- section: Agent Templates # contents: # - page: Introduction to Templates # path: pages/cloud/templates.mdx # - page: Memory Variables # path: pages/cloud/variables.mdx # - page: Versioning # path: pages/cloud/versions.mdx - section: Additional Resources contents: - page: Letta Desktop Troubleshooting path: pages/desktop/troubleshooting.mdx - page: ADE Troubleshooting path: pages/agent-development-environment/troubleshooting.mdx - tab: ade layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: ADE Guide contents: - page: ADE Overview path: pages/ade-guide/overview.mdx - section: Getting Started path: pages/ade-guide/setup.mdx contents: - page: Access from your browser icon: fa-sharp fa-light fa-browser path: pages/ade-guide/web.mdx - page: Download Letta Desktop icon: fa-sharp fa-light fa-download path: pages/desktop/install.mdx - section: ADE Components contents: - page: Agent Simulator icon: fa-sharp fa-light fa-alien-8bit path: pages/ade-guide/simulator.mdx - page: Context Window Viewer icon: fa-sharp fa-light fa-eye path: pages/ade-guide/context_window_viewer.mdx - page: Core Memory icon: fa-sharp fa-light fa-brain path: pages/ade-guide/core_memory.mdx - page: Archival Memory icon: fa-sharp fa-light fa-box-archive path: pages/ade-guide/archival_memory.mdx - page: Data Sources icon: fa-sharp fa-light fa-database path: pages/ade-guide/data_sources.mdx - page: Tools icon: fa-sharp fa-light fa-wrench path: pages/ade-guide/tools.mdx - page: Settings icon: fa-sharp fa-light fa-gear path: pages/ade-guide/settings.mdx - tab: selfhosted layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 #- page: Install Letta Desktop # icon: fa-sharp fa-light fa-download # path: pages/install.mdx - section: Self-Hosting contents: - page: Overview path: pages/selfhosting/overview.mdx - page: Tool Execution path: pages/tool_execution/local_tool_execution.mdx - page: Tracing & Telemetry path: pages/deployment/telemetry.mdx - section: Deployment path: pages/deployment/remote.mdx contents: - page: Railway path: pages/deployment/railway.mdx #- page: Deploying with Docker # icon: fa-brands fa-docker # path: pages/server/docker.mdx #- page: Install Letta via pip # icon: fa-brands fa-python # path: pages/server/pip.mdx - section: Connecting Model Providers contents: - page: Supported Models path: pages/selfhosting/supported-models.mdx - page: OpenAI path: pages/models/openai.mdx - page: Anthropic path: pages/models/anthropic.mdx - page: Gemini (Google AI) path: pages/models/google.mdx - page: LM Studio path: pages/models/lmstudio.mdx - section: See More Providers icon: fa-sharp fa-light fa-caret-down contents: - page: OpenAI proxy path: pages/models/openai_proxy.mdx - page: DeepSeek path: pages/models/deepseek.mdx - page: AWS Bedrock path: pages/models/aws_bedrock.mdx - page: Groq path: pages/models/groq.mdx - page: xAI (Grok) path: pages/models/xai.mdx - page: Together path: pages/models/together.mdx - page: Google Vertex path: pages/models/google_vertex.mdx - page: Azure OpenAI path: pages/models/azure.mdx - page: Ollama path: pages/models/ollama.mdx - page: vLLM path: pages/models/vllm.mdx #- section: Remote Deployments # contents: # - page: Overview # path: pages/deployment/remote.mdx # - page: Example - Deploy on Railway # path: pages/deployment/railway.mdx - section: Advanced contents: #- page: Install with pip # path: pages/server/pip.mdx - page: Database Configuration path: pages/selfhosting/postgres.mdx - page: Performance path: pages/selfhosting/performance.mdx - page: pgadmin path: pages/selfhosting/pgadmin.mdx - page: Installing from Source path: pages/server/source.mdx - tab: cloud layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: Get started contents: - page: Overview path: pages/cloud/overview.mdx #- page: Quickstart # path: pages/getting-started/quickstart_cloud.mdx - page: Get a Letta Cloud API key path: pages/cloud/api_key.mdx - section: Account contents: - page: Plans & Pricing path: pages/cloud/pricing.mdx # - page: Available Models # path: pages/cloud/models.mdx - page: Custom API Keys path: pages/cloud/api_keys.mdx - page: Role-Based Access Control path: pages/cloud/rbac.mdx - section: Deploying Agents contents: - page: Agent Templates Overview path: pages/cloud/templates.mdx - page: Template Versioning path: pages/cloud/versions.mdx - page: Memory Variables path: pages/cloud/variables.mdx - page: Client-Side Access Tokens path: pages/cloud/client-side-tokens.mdx # - page: Deploying via the SDK # path: pages/cloud/variables.mdx # - page: Deploying via the ADE # path: pages/cloud/versions.mdx - section: Observability contents: - page: Overview path: pages/cloud/observability.mdx - page: Monitoring path: pages/cloud/monitoring.mdx - page: Responses & Tracing path: pages/cloud/responses.mdx - tab: ref layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: API Reference contents: - page: API and SDK Overview path: pages/api/about.mdx - changelog: ./changelog title: Changelog slug: changelog - api: API Reference display-errors: true paginated: true flattened: true snippets: typescript: "@letta-ai/letta-client" python: letta-client layout: - agents: - GET /v1/agents/ - GET /v1/agents/{agent_id} - POST /v1/agents/ - PATCH /v1/agents/{agent_id} - DELETE /v1/agents/{agent_id} - endpoint: GET /v1/agents/count hidden: true - POST /v1/agents/import - GET /v1/agents/{agent_id}/export - endpoint: POST /v1/agents/search hidden: true - section: Blocks contents: - GET /v1/agents/{agent_id}/core-memory/blocks - GET /v1/agents/{agent_id}/core-memory/blocks/{block_label} - PATCH /v1/agents/{agent_id}/core-memory/blocks/{block_label} - PATCH /v1/agents/{agent_id}/core-memory/blocks/attach/{block_id} - PATCH /v1/agents/{agent_id}/core-memory/blocks/detach/{block_id} - section: Tools contents: - GET /v1/agents/{agent_id}/tools - PATCH /v1/agents/{agent_id}/tools/attach/{tool_id} - PATCH /v1/agents/{agent_id}/tools/detach/{tool_id} - PATCH /v1/agents/{agent_id}/tools/approval/{tool_name} - section: Messages contents: - GET /v1/agents/{agent_id}/messages - POST /v1/agents/{agent_id}/messages - POST /v1/agents/{agent_id}/messages/stream - POST /v1/agents/{agent_id}/messages/async - POST /v1/agents/{agent_id}/messages/cancel - POST /v1/agents/{agent_id}/summarize - POST /v1/agents/{agent_id}/messages/preview-raw-payload - POST /v1/agents/messages/search - PATCH /v1/agents/{agent_id}/messages/{message_id} - PATCH /v1/agents/{agent_id}/reset-messages - section: Folders contents: - GET /v1/agents/{agent_id}/folders - PATCH /v1/agents/{agent_id}/folders/attach/{folder_id} - PATCH /v1/agents/{agent_id}/folders/detach/{folder_id} - section: Files contents: - GET /v1/agents/{agent_id}/files - PATCH /v1/agents/{agent_id}/files/{file_id}/open - PATCH /v1/agents/{agent_id}/files/{file_id}/close - PATCH /v1/agents/{agent_id}/files/close-all - section: Groups contents: - GET /v1/agents/{agent_id}/groups - section: Context icon: ban contents: - GET /v1/agents/{agent_id}/context - section: Core Memory icon: ban contents: - GET /v1/agents/{agent_id}/core-memory - section: Memory Variables icon: ban contents: - GET /v1/agents/{agent_id}/core-memory/variables - section: Passages icon: ban contents: - GET /v1/agents/{agent_id}/archival-memory - GET /v1/agents/{agent_id}/archival-memory/search - POST /v1/agents/{agent_id}/archival-memory - DELETE /v1/agents/{agent_id}/archival-memory/{memory_id} - section: Sources icon: ban contents: - GET /v1/agents/{agent_id}/sources - PATCH /v1/agents/{agent_id}/sources/attach/{source_id} - PATCH /v1/agents/{agent_id}/sources/detach/{source_id} - models: - GET /v1/models/ - endpoint: GET /v1/models/embedding slug: list-embedding-models - endpoint: GET /v1/models/embeddings hidden: true - blocks: - GET /v1/blocks/ - GET /v1/blocks/{block_id} - POST /v1/blocks/ - PATCH /v1/blocks/{block_id} - DELETE /v1/blocks/{block_id} - endpoint: GET /v1/blocks/count hidden: true - identities: - GET /v1/identities/ - GET /v1/identities/{identity_id} - POST /v1/identities/ - PUT /v1/identities/ - PATCH /v1/identities/{identity_id} - DELETE /v1/identities/{identity_id} - endpoint: GET /v1/identities/count hidden: true - tools: - endpoint: GET /v1/tools/count hidden: true - folders: - GET /v1/folders/ - GET /v1/folders/{folder_id} - POST /v1/folders/ - PATCH /v1/folders/{folder_id} - DELETE /v1/folders/{folder_id} - endpoint: GET /v1/folders/count hidden: true - jobs - runs - steps - groups: - GET /v1/groups/ - GET /v1/groups/{group_id} - POST /v1/groups/ - PATCH /v1/groups/{group_id} - DELETE /v1/groups/{group_id} - endpoint: GET /v1/groups/count hidden: true - providers: - GET /v1/providers/ - GET /v1/providers/{provider_id} - POST /v1/providers/ - PATCH /v1/providers/{provider_id} - DELETE /v1/providers/{provider_id} - POST /v1/providers/check - tags - batches: - GET /v1/messages/batches - GET /v1/messages/batches/{batch_id} - POST /v1/messages/batches - PATCH /v1/messages/batches/{batch_id}/cancel - section: Messages contents: - GET /v1/messages/batches/{batch_id}/messages - voice - health - projects - templates - client side access tokens - section: telemetry icon: ban contents: - GET /v1/telemetry/{step_id} - section: sources icon: ban contents: - GET /v1/sources/ - GET /v1/sources/{source_id} - POST /v1/sources/ - PATCH /v1/sources/{source_id} - DELETE /v1/sources/{source_id} - GET /v1/sources/count - GET /v1/sources/name/{source_name} - GET /v1/sources/metadata - GET /v1/sources/{source_id}/agents - GET /v1/sources/{source_id}/files/{file_id} - POST /v1/sources/{source_id}/upload - GET /v1/sources/{source_id}/files - DELETE /v1/sources/{source_id}/{file_id} - GET /v1/sources/{source_id}/passages - tab: showcase layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: Examples contents: - page: Overview path: pages/cookbooks_simple.mdx - page: Your First Agent path: pages/tutorials/hello_world.mdx - page: Attaching and Detaching Memory Blocks path: pages/tutorials/attaching_detaching_blocks.mdx - page: Shared Memory Blocks path: pages/tutorials/shared-memory-blocks.mdx - section: Multi-Agent contents: - page: Async Multi-Agent path: pages/tutorials/multiagent_async.mdx - section: Agent Templates contents: - page: Building customer-specific relationship agents path: pages/tutorials/customer-specific-agents.mdx - tab: leaderboard layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: Letta Leaderboard contents: - page: Overview path: pages/leaderboard/overview.mdx # - page: Benchmark Information # path: pages/leaderboard/benchmarks.mdx - page: Contributing Results path: pages/leaderboard/contributing.mdx - tab: evals layout: - link: Chat on Discord icon: fa-brands fa-discord href: https://discord.gg/letta - link: Developer Forum icon: fa-sharp fa-light fa-comments href: https://forum.letta.com - link: DeepLearning.AI Course icon: fa-sharp fa-light fa-building-columns href: https://www.deeplearning.ai/short-courses/llms-as-operating-systems-agent-memory/?utm_campaign=memgpt-launch&utm_content=331638345&utm_medium=social&utm_source=docs&hss_channel=tw-992153930095251456 - section: Get Started contents: - page: Overview path: pages/evals/overview.mdx - page: Getting Started path: pages/evals/getting-started.mdx - section: Core Concepts contents: - page: Concepts Overview path: pages/evals/concepts/overview.mdx - page: Suites path: pages/evals/concepts/suites.mdx - page: Datasets path: pages/evals/concepts/datasets.mdx - page: Targets path: pages/evals/concepts/targets.mdx - page: Graders path: pages/evals/concepts/graders.mdx - page: Extractors path: pages/evals/concepts/extractors.mdx - page: Gates path: pages/evals/concepts/gates.mdx - section: Configuration contents: - page: Suite YAML Reference path: pages/evals/configuration/suite-yaml.mdx - section: Graders contents: - page: Tool Graders path: pages/evals/graders/tool-graders.mdx - page: Rubric Graders path: pages/evals/graders/rubric-graders.mdx - page: Multi-Metric Grading path: pages/evals/graders/multi-metric.mdx - section: Extractors contents: - page: Built-in Extractors path: pages/evals/extractors/builtin.mdx - page: Custom Extractors path: pages/evals/extractors/custom.mdx - section: Advanced contents: - page: Custom Graders path: pages/evals/advanced/custom-graders.mdx - page: Multi-Turn Conversations path: pages/evals/advanced/multi-turn-conversations.mdx - section: CLI Reference contents: - page: Commands path: pages/evals/cli/commands.mdx - section: Results & Metrics contents: - page: Understanding Results path: pages/evals/results/overview.mdx - section: Troubleshooting contents: - page: Common Issues path: pages/evals/troubleshooting.mdx # - tab: cookbooks # layout: # - section: Cookbooks # path: pages/cookbooks.mdx # contents: # - section: Multi-Agent # contents: # - page: Async Multi-Agent # path: pages/tutorials/multiagent_async.mdx # - tab: community # layout: # - 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