Letta
Letta Feeds API

Subscribed feeds that drive agents.
Documentation GitHub OpenAPI
OpenAPI Specification

openapi: 3.1.0
info:
  title: Letta Admin Feeds API
  version: 1.0.0
  description: REST API for Letta, the stateful agents platform. Manage agents, memory blocks, archival passages, sources, custom tools, MCP servers, multi-agent groups, runs, and streaming responses. Available as Letta Cloud (managed) at https://api.letta.com/v1 and as the self-hosted open-source server (Apache-2.0) typically run at http://localhost:8283.
  contact:
    name: Letta
    url: https://www.letta.com/
    email: support@letta.com
  license:
    name: Apache-2.0
    url: https://github.com/letta-ai/letta/blob/main/LICENSE
  x-logo:
    url: https://www.letta.com/favicon.ico
servers:
- url: https://api.letta.com
  description: Letta Cloud (managed)
- url: https://app.letta.com
  description: Letta Cloud (app)
- url: http://localhost:8283
  description: Self-hosted Letta server
security:
- bearerAuth: []
tags:
- name: Feeds
  description: Subscribed feeds that drive agents.
paths:
  /v1/feeds:
    post:
      description: Create a new feed in a project
      summary: Create Feed
      tags:
      - Feeds
      parameters: []
      operationId: feeds.createFeed
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                project_id:
                  type: string
                name:
                  type: string
                  minLength: 1
                  maxLength: 100
                description:
                  type: string
                  maxLength: 500
              required:
              - project_id
              - name
      responses:
        '201':
          description: '201'
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  name:
                    type: string
                  description:
                    type: string
                    nullable: true
                  project_id:
                    type: string
                  organization_id:
                    type: string
                  created_by_id:
                    type: string
                    nullable: true
                  created_at:
                    type: string
                  updated_at:
                    type: string
                required:
                - id
                - name
                - description
                - project_id
                - organization_id
                - created_by_id
                - created_at
                - updated_at
    get:
      description: List all feeds with optional filters and pagination
      summary: List Feeds
      tags:
      - Feeds
      parameters:
      - name: project_id
        in: query
        schema:
          type: string
      - name: name
        in: query
        schema:
          type: string
      - name: limit
        in: query
        schema:
          type: string
      - name: offset
        in: query
        schema:
          oneOf:
          - type: string
          - type: number
      operationId: feeds.listFeeds
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  feeds:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        name:
                          type: string
                        description:
                          type: string
                          nullable: true
                        project_id:
                          type: string
                        organization_id:
                          type: string
                        created_at:
                          type: string
                        updated_at:
                          type: string
                        subscriptions_count:
                          type: number
                      required:
                      - id
                      - name
                      - description
                      - project_id
                      - organization_id
                      - created_at
                      - updated_at
                      - subscriptions_count
                  has_next_page:
                    type: boolean
                required:
                - feeds
                - has_next_page
  /v1/feeds/{feed_id}:
    get:
      description: Retrieve feed details by ID
      summary: Get Feed
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.getFeed
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  name:
                    type: string
                  description:
                    type: string
                    nullable: true
                  project_id:
                    type: string
                  organization_id:
                    type: string
                  created_by_id:
                    type: string
                    nullable: true
                  created_at:
                    type: string
                  updated_at:
                    type: string
                  subscriptions_count:
                    type: number
                  messages_count:
                    type: number
                required:
                - id
                - name
                - description
                - project_id
                - organization_id
                - created_by_id
                - created_at
                - updated_at
                - subscriptions_count
    delete:
      description: Soft delete a feed and clean up its sequence
      summary: Delete Feed
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.deleteFeed
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties: {}
              nullable: true
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                required:
                - success
  /v1/feeds/{feed_id}/messages:
    post:
      description: Batch insert messages into a feed (up to 10,000 per request)
      summary: Publish Messages
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.publishMessages
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                messages:
                  type: array
                  items:
                    type: object
                    properties:
                      content:
                        type: string
                    required:
                    - content
                  minItems: 1
                  maxItems: 10000
              required:
              - messages
      responses:
        '201':
          description: '201'
          content:
            application/json:
              schema:
                type: object
                properties:
                  inserted_count:
                    type: number
                required:
                - inserted_count
    get:
      description: List messages from a feed (for debugging/inspection)
      summary: List Feed Messages
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: after_sequence
        in: query
        schema:
          type: string
      - name: limit
        in: query
        schema:
          type: string
      operationId: feeds.listMessages
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  messages:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        feed_id:
                          type: string
                        sequence:
                          type: number
                        content_preview:
                          type: string
                        is_truncated:
                          type: boolean
                        content_size_bytes:
                          type: number
                        expires_at:
                          type: string
                        created_at:
                          type: string
                      required:
                      - id
                      - feed_id
                      - sequence
                      - content_preview
                      - is_truncated
                      - content_size_bytes
                      - expires_at
                      - created_at
                  has_next_page:
                    type: boolean
                  next_cursor:
                    type: number
                    nullable: true
                required:
                - messages
                - has_next_page
                - next_cursor
  /v1/feeds/{feed_id}/messages/{message_id}:
    get:
      description: Get full content of a feed message
      summary: Get Feed Message
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: message_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.getMessage
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: object
                    properties:
                      id:
                        type: string
                      feed_id:
                        type: string
                      sequence:
                        type: number
                      content:
                        type: string
                      content_size_bytes:
                        type: number
                      expires_at:
                        type: string
                      created_at:
                        type: string
                    required:
                    - id
                    - feed_id
                    - sequence
                    - content
                    - content_size_bytes
                    - expires_at
                    - created_at
                required:
                - message
        '404':
          description: '404'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                required:
                - message
  /v1/feeds/{feed_id}/subscribe:
    post:
      description: Subscribe an agent to a feed with polling configuration
      summary: Subscribe Agent to Feed
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.subscribeAgent
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                agent_id:
                  type: string
                cron_schedule:
                  type: string
                prompt_template:
                  type: string
              required:
              - agent_id
              - cron_schedule
      responses:
        '201':
          description: '201'
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  feed_id:
                    type: string
                  agent_id:
                    type: string
                  agent_name:
                    type: string
                    nullable: true
                  cron_schedule:
                    type: string
                  merge_strategy:
                    type: string
                    enum:
                    - unique-messages
                    - combine-into-single-message
                  prompt_template:
                    type: string
                    nullable: true
                  next_scheduled_at:
                    type: string
                  last_consumed_sequence:
                    type: number
                  last_consumed_at:
                    type: string
                    nullable: true
                  disabled_at:
                    type: string
                    nullable: true
                  created_at:
                    type: string
                required:
                - id
                - feed_id
                - agent_id
                - agent_name
                - cron_schedule
                - merge_strategy
                - prompt_template
                - next_scheduled_at
                - last_consumed_sequence
                - last_consumed_at
                - disabled_at
                - created_at
        '400':
          description: '400'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                  errorCode:
                    type: string
                    enum:
                    - agentAlreadySubscribed
                    - agentNotInProject
                    - invalidCronExpression
                required:
                - message
                - errorCode
  /v1/feeds/{feed_id}/subscriptions/{subscription_id}:
    patch:
      description: Update subscription configuration (cron schedule, enable/disable)
      summary: Update Subscription
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: subscription_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.updateSubscription
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                cron_schedule:
                  type: string
                prompt_template:
                  type: string
                disabled:
                  type: boolean
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  id:
                    type: string
                  feed_id:
                    type: string
                  agent_id:
                    type: string
                  agent_name:
                    type: string
                    nullable: true
                  cron_schedule:
                    type: string
                  merge_strategy:
                    type: string
                    enum:
                    - unique-messages
                    - combine-into-single-message
                  prompt_template:
                    type: string
                    nullable: true
                  next_scheduled_at:
                    type: string
                  last_consumed_sequence:
                    type: number
                  last_consumed_at:
                    type: string
                    nullable: true
                  disabled_at:
                    type: string
                    nullable: true
                  created_at:
                    type: string
                  updated_at:
                    type: string
                required:
                - id
                - feed_id
                - agent_id
                - agent_name
                - cron_schedule
                - merge_strategy
                - prompt_template
                - next_scheduled_at
                - last_consumed_sequence
                - last_consumed_at
                - disabled_at
                - created_at
                - updated_at
    delete:
      description: Remove agent subscription from a feed (by subscription_id)
      summary: Delete Subscription
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: subscription_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.deleteSubscription
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties: {}
              nullable: true
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                required:
                - success
  /v1/feeds/{feed_id}/unsubscribe:
    post:
      description: Remove agent subscription from a feed (by agent_id)
      summary: Unsubscribe Agent from Feed
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.unsubscribeAgent
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                agent_id:
                  type: string
              required:
              - agent_id
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                required:
                - success
  /v1/feeds/{feed_id}/subscriptions/{subscription_id}/trigger:
    post:
      description: Immediately trigger a subscription to process pending messages
      summary: Trigger Subscription
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: subscription_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.triggerSubscription
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties: {}
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  success:
                    type: boolean
                  messages_sent:
                    type: number
                required:
                - success
                - messages_sent
        '404':
          description: '404'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                required:
                - message
  /v1/feeds/{feed_id}/subscriptions/{subscription_id}/backfill:
    post:
      description: Start a background job to send historical messages to an agent subscription. Returns immediately with workflow ID. Does not update last_consumed_sequence.
      summary: Backfill Subscription
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: subscription_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.backfillSubscription
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                from_sequence:
                  type: number
                to_sequence:
                  type: number
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  workflow_id:
                    type: string
                required:
                - workflow_id
        '404':
          description: '404'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                  errorCode:
                    type: string
                    enum:
                    - feedNotFound
                    - subscriptionNotFound
                required:
                - message
                - errorCode
  /v1/feeds/{feed_id}/subscriptions/{subscription_id}/history:
    get:
      description: List the run history for a subscription including scheduled runs, manual triggers, and backfills.
      summary: List Subscription History
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: subscription_id
        in: path
        required: true
        schema:
          type: string
      - name: page_size
        in: query
        schema:
          type: string
      - name: next_page_token
        in: query
        schema:
          type: string
      operationId: feeds.listSubscriptionHistory
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  runs:
                    type: array
                    items:
                      type: object
                      properties:
                        workflow_id:
                          type: string
                        type:
                          type: string
                          enum:
                          - scheduled
                          - manual
                          - backfill
                        status:
                          type: string
                          enum:
                          - running
                          - completed
                          - failed
                          - canceled
                          - timed_out
                        started_at:
                          type: string
                        completed_at:
                          type: string
                          nullable: true
                      required:
                      - workflow_id
                      - type
                      - status
                      - started_at
                      - completed_at
                  next_page_token:
                    type: string
                    nullable: true
                required:
                - runs
                - next_page_token
        '404':
          description: '404'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                  errorCode:
                    type: string
                    enum:
                    - feedNotFound
                    - subscriptionNotFound
                required:
                - message
                - errorCode
  /v1/feeds/{feed_id}/subscriptions/cron:
    patch:
      description: Update the cron schedule for all subscriptions of a feed
      summary: Update All Subscriptions Cron Schedule
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      operationId: feeds.updateAllSubscriptionsCron
      requestBody:
        description: Body
        content:
          application/json:
            schema:
              type: object
              properties:
                cron_schedule:
                  type: string
              required:
              - cron_schedule
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  updated_count:
                    type: number
                required:
                - updated_count
        '404':
          description: '404'
          content:
            application/json:
              schema:
                type: object
                properties:
                  message:
                    type: string
                required:
                - message
  /v1/feeds/{feed_id}/subscriptions:
    get:
      description: List all agent subscriptions for a feed
      summary: List Feed Subscriptions
      tags:
      - Feeds
      parameters:
      - name: feed_id
        in: path
        required: true
        schema:
          type: string
      - name: limit
        in: query
        schema:
          type: string
      - name: offset
        in: query
        schema:
          oneOf:
          - type: string
          - type: number
      - name: agent_id
        in: query
        schema:
          type: string
      operationId: feeds.listSubscriptions
      responses:
        '200':
          description: '200'
          content:
            application/json:
              schema:
                type: object
                properties:
                  subscriptions:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        feed_id:
                          type: string
                        agent_id:
                          type: string
                        agent_name:
                          type: string
                          nullable: true
                        cron_schedule:
                          type: string
                        merge_strategy:
                          type: string
                          enum:
                          - unique-messages
                          - combine-into-single-message
                        prompt_template:
                          type: string
                          nullable: true
                        next_scheduled_at:
                          type: string
                        last_consumed_sequence:
                          type: number
                        last_consumed_at:
                          type: string
                          nullable: true
                        disabled_at:
                          type: string
                          nullable: true
                        created_at:
                          type: string
                        updated_at:
                          type: string
                      required:
                      - id
                      - feed_id
                      - agent_id
                      - agent_name
                      - cron_schedule
                      - merge_strategy
                      - prompt_template
                      - next_scheduled_at
                      - last_consumed_sequence
                      - last_consumed_at
                      - disabled_at
                      - created_at
                      - updated_at
                  has_next_page:
                    type: boolean
                required:
                - subscriptions
                - has_next_page
components:
  securitySchemes:
    bearerAuth:
      type: http
      scheme: bearer
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