Navi API Reference

Base URL: http://localhost:8000

REST API

Health

`GET /health`

Server availability check.

Response 200

{
  "status": "ok",
  "embed": {
    "status": "ok",
    "model": "nomic-embed-text",
    "dimensions": 768
  }
}

`GET /health/embed`

Embedding model health check. Returns the first vector of a test string to verify the embed backend is responsive.

Response 200

{
  "status": "ok",
  "model": "nomic-embed-text",
  "dimensions": 768
}

Auth

Full auth documentation: docs/auth.md.

`GET /auth/login`

Redirect to gnexus-auth OAuth authorization endpoint. Sets PKCE + state internally.

Query params

return_to — URL to redirect back to after login (default: /)
platform — browser (default) or android (affects redirect after callback)

Response 302 → Location: gnexus-auth /oauth/authorize

`GET /auth/callback`

OAuth callback. Validates state, exchanges code for tokens, creates DB session.

Query params

code — authorization code from gnexus-auth
state — state parameter

Response 302

Browser → Location: / (with Set-Cookie)
Android → Location: /auth/mobile-done?sid=<session_id>

Errors

400 — invalid state, PKCE failure, or token exchange failed
503 — OAuth is not configured (missing gnexus_auth_client_id or gnexus_auth_client_secret)

`GET /auth/mobile-done`

Bridge page for Android OAuth. Renders HTML that attempts an automatic deep-link back into the native app via Chrome Intent URL (intent://...), and falls back to a manual button for browsers that block automatic navigation to custom schemes (e.g. DuckDuckGo). Styled with the gnexus UI kit design system.

Query params

sid — session id that will become the navi_auth_session cookie

Response 200 — HTML page

`POST /auth/logout`

Logout current user. Deletes DB session and clears cookie.

Response 200

{ "ok": true }

`GET /auth/me`

Return current authenticated user.

Response 200

{
  "id": "user-uuid",
  "email": "user@example.com",
  "display_name": "User Name",
  "username": "username",
  "first_name": "First",
  "last_name": "Last",
  "phone": "+1234567890",
  "birth_date": "1990-01-01",
  "country": "US",
  "city": "New York",
  "locale": "en-US",
  "avatar_url": "https://...",
  "profile_url": "https://...",
  "role": "admin",
  "permissions": ["navi.sessions.read_all", "navi.memory.read_all"]
}

Errors

401 — not authenticated

`GET /auth/status`

Check if the user is currently authenticated without returning full profile.

Response 200

{ "authenticated": true }

Profiles & Tools

`GET /agents/profiles`

List available agent profiles. Non-admin users do not see is_admin_only profiles.

Response 200

[
  {
    "id": "secretary",
    "name": "Personal Secretary",
    "description": "General-purpose assistant",
    "enabled_tools": ["todo", "mcp:navi-web:web_search", "filesystem", "..."],
    "llm_backend": "ollama",
    "model": ["gemma4:31b-cloud", "gemma4:26b-a4b-it-q4_K_M"],
    "temperature": 0.65,
    "top_k": null,
    "top_p": null,
    "max_iterations": 10,
    "iteration_budget_enabled": true,
    "think_enabled": true,
    "subagent_think_enabled": null,
    "mcp_servers": {"gnexus-book": ["read", "write"]}
  }
]

`GET /agents/tools`

List all registered tools (built-in + user tools).

Response 200

[
  {
    "name": "mcp:navi-web:web_search",
    "description": "Search the web using DuckDuckGo.",
    "parameters": {"type": "object", "properties": {...}, "required": [...]}
  },
  {
    "name": "filesystem",
    "description": "Read, write and list files.",
    "parameters": {"type": "object", "properties": {...}, "required": [...]}
  }
]

`GET /agents/prompts`

Return the fully resolved system prompt for each profile (persona + profile system_prompt + context provider injections + MCP server instructions).

Response 200

{
  "secretary": "system prompt text...",
  "server_admin": "system prompt text..."
}

`GET /agents/mcp_servers`

Return all configured MCP servers with their resolved tools per profile.

Response 200

{
  "gnexus-book": {
    "connected": true,
    "tools": [
      {"name": "gnexus-book_list_inventory", "description": "..."}
    ],
    "instructions": "MANDATORY: Before answering ANY question..."
  }
}

Sessions

`POST /sessions`

Create a new session.

Auth: requires authenticated user.

Request body

{ "profile_id": "secretary" }

Response 201

{
  "session_id": "550e8400-e29b-41d4-a716-446655440000",
  "profile_id": "secretary",
  "created_at": "2026-04-10T18:00:00+00:00"
}

Errors

401 — not authenticated
404 — profile not found

`GET /sessions`

List all sessions sorted by activity (pinned first).

Auth: requires authenticated user.

Query params | Param | Default | Description | |---|---|---| | limit | 50 | Page size | | offset | 0 | Items to skip | | profile_id | — | Filter by profile |

Response 200 (when pagination params provided)

{
  "items": [
    {
      "session_id": "550e8400-...",
      "profile_id": "secretary",
      "name": "Research task",
      "message_count": 12,
      "preview": "Last 60 chars of the most recent message",
      "pinned": false,
      "created_at": "2026-04-10T15:00:00+00:00",
      "last_active": "2026-04-10T18:00:00+00:00"
    }
  ],
  "limit": 50,
  "offset": 0,
  "has_more": true,
  "next_offset": 50
}

Response 200 (plain list when no pagination params)

[
  {
    "session_id": "550e8400-...",
    "profile_id": "secretary",
    "name": "Research task",
    "message_count": 12,
    "preview": "Last 60 chars of the most recent message",
    "pinned": false,
    "created_at": "2026-04-10T15:00:00+00:00",
    "last_active": "2026-04-10T18:00:00+00:00"
  }
]

name is null until POST /sessions/{id}/generate-name is called.

`GET /sessions/{session_id}`

Full session with message history (display history — never compressed).

Auth: requires authenticated user (or ownership of the session).

Response 200

{
  "session_id": "550e8400-...",
  "profile_id": "secretary",
  "name": "Research task",
  "context_token_count": 4913,
  "max_context_tokens": 65536,
  "created_at": "...",
  "last_active": "...",
  "messages": [
    {
      "role": "user",
      "content": "Hello",
      "created_at": "2026-04-10T18:00:00+00:00"
    },
    {
      "role": "assistant",
      "content": "Hi. How can I help?",
      "created_at": "2026-04-10T18:00:05+00:00"
    },
    {
      "role": "assistant",
      "tool_calls": [
        {
          "id": "abc123",
          "name": "mcp:navi-web:web_search",
          "arguments": { "query": "..." }
        }
      ]
    },
    {
      "role": "tool",
      "content": "tool result",
      "tool_call_id": "abc123",
      "name": "mcp:navi-web:web_search"
    }
  ]
}

Message fields (role is always present, others by availability):

Field	Type	Description
`role`	`user\	assistant\	tool\	system`	Message author
`content`	`string\	null`	Text content
`images`	`string[]`	Base64 images (user/assistant)
`tool_calls`	`ToolCall[]`	Tool invocations (assistant)
`tool_call_id`	`string`	ID of the call this result belongs to (tool)
`name`	`string`	Tool name (tool messages)
`thinking`	`string\	null`	LLM reasoning captured during a tool-calling turn
`is_plan`	`bool`	Planning phase output — rendered as a plan card, not text
`is_compression`	`bool`	Marker injected when context compression ran
`is_summary`	`bool`	Summary message replacing compressed history
`created_at`	`string` (ISO 8601)	Creation time
`elapsed_seconds`	`number\	null`	Time to complete the turn (final assistant message)
`tool_call_count`	`number\	null`	Number of tool calls in the turn
`token_count`	`number\	null`	Tokens used in the turn

Errors

404 — session not found

`DELETE /sessions/{session_id}`

Delete a session and its files.

Response 204 — no body

Errors

404 — session not found

`PATCH /sessions/{session_id}/pin`

Pin or unpin a session.

Request body

{ "pinned": true }

Response 200

{ "session_id": "...", "pinned": true }

`POST /sessions/{session_id}/generate-name`

Generate a short display name for a session from its message history. Called automatically by the client after the first exchange. No-op if the session already has a name.

Response 200

{ "name": "Web search for recipes" }

Returns {"name": null} if there are no user messages yet.

Errors

404 — session not found

`GET /sessions/{session_id}/context`

LLM context (what the model actually sees). May differ from messages — compressed history replaces old turns with a summary. Debug endpoint.

Auth: requires admin role.

Response 200

{
  "session_id": "...",
  "profile_id": "secretary",
  "message_count": 8,
  "total_chars": 4200,
  "context": [ ...same format as messages... ]
}

Errors

403 — not admin

`GET /sessions/{session_id}/planning`

All planning phase debug logs for the session. Each entry is one planning run.

Auth: requires admin role.

Response 200

{ "session_id": "...", "logs": [ { "phase": "...", "output": "..." }, ... ] }

Errors

403 — not admin

`GET /sessions/{session_id}/content`

List published session content (artifacts registered via content_publish tool).

Response 200

{
  "content": [
    {
      "id": "...",
      "filename": "report.html",
      "path": "/abs/path/to/content/...",
      "size": 102400,
      "content_type": "text/html",
      "created_at": "2026-04-10T18:00:00+00:00"
    }
  ]
}

Errors

404 — session not found

`POST /sessions/{session_id}/files`

Upload a file for a session. Call before sending a message to attach the file.

Request: multipart/form-data, field file.

Limits

Max size: 200 MB
Forbidden extensions: .exe, .dll, .so, .sh, .bat, .cmd, .ps1, .vbs, .bin, .elf, and other executable formats
Duplicate filenames get a numeric suffix

Response 201

{
  "name": "report.pdf",
  "size": 102400,
  "path": "/abs/path/to/session_files/550e8400-.../report.pdf",
  "content_type": "application/pdf"
}

Errors

400 — forbidden extension
404 — session not found
413 — file exceeds limit

`GET /sessions/{session_id}/files/{filename}`

Download or view an uploaded file. Images, PDFs, plain text and HTML are served inline; everything else as an attachment.

Query params

download — force attachment download regardless of content type

Response 200 — file bytes

Errors

403 — path traversal attempt
404 — session or file not found

Messages (non-streaming)

`POST /sessions/{session_id}/messages`

Send a message and receive a response synchronously (no streaming). Blocks until the full agent loop completes.

Request body

{ "content": "How many stars are in the galaxy?" }

Response 200

{ "role": "assistant", "content": "Estimates range from 100 to 400 billion." }

Errors

404 — session not found
500 — agent error or iteration limit exceeded

For production clients prefer WebSocket — it provides streaming, tool progress, and model reasoning.

WebSocket

`WS /ws/sessions/{session_id}`

Main channel for real-time agent interaction. Supports text streaming, thinking streaming, tool events, file and image attachment.

Connect: if the session is not found, the server closes with code 4004.

On connect: the server immediately sends session_sync (no active run) or starts the reconnect replay flow (run in progress).

Client → Server

All client messages are JSON objects.

Send a message

{
  "type": "message",
  "content": "Message text",
  "images": ["base64string...", "..."],
  "files": [
    { "name": "report.pdf", "size": 102400, "path": "session_files/.../report.pdf" }
  ]
}

Field	Required	Description
`type`	yes	Always `"message"`
`content`	yes	Message text (non-empty)
`images`	no	Base64 image list. Both raw base64 and `data:image/...;base64,...` are accepted — server strips the prefix
`files`	no	Files uploaded via `POST /sessions/{id}/files`. Server appends their paths to the message content

Server → Client

Events arrive in the order they are emitted.

`stream_start`

{ "type": "stream_start" }

Processing started. Client should block input.

`thinking_delta`

{ "type": "thinking_delta", "delta": "reasoning fragment..." }

Streaming chunk of model reasoning. Accumulate until thinking_end.

`thinking_end`

{ "type": "thinking_end" }

Reasoning phase complete. Next will be stream_delta or tool calls.

`turn_thinking`

{
  "type": "turn_thinking",
  "thinking": "full reasoning text...",
  "is_subagent": false
}

Complete reasoning block from a tool-calling turn. Not streamed — arrives whole. is_subagent: true means this reasoning came from a subagent inside spawn_agent.

`planning_status`

{
  "type": "planning_status",
  "phase": "analysis",
  "label": "Analysing request...",
  "is_subagent": false
}

Progress update during the planning phase. phase is one of analysis, reflect, plan. is_subagent: true — route into the spawn_agent card, not the top-level UI.

`plan_ready`

{
  "type": "plan_ready",
  "plan": "1. Step one\n2. Step two\n...",
  "is_subagent": false
}

Planning complete — full step list. Rendered as a collapsible plan card. is_subagent: true — route into the spawn_agent card.

`tool_started`

{
  "type": "tool_started",
  "tool": "mcp:navi-web:web_search",
  "args": { "query": "weather in moscow" },
  "is_subagent": false
}

Agent started executing a tool. Arrives before execution completes — show a spinner. is_subagent: true — call from a subagent.

`tool_call`

{
  "type": "tool_call",
  "tool": "mcp:navi-web:web_search",
  "args": { "query": "weather in moscow" },
  "result": "Today +12°C, cloudy.",
  "success": true,
  "is_subagent": false
}

Tool finished. Arrives after tool_started with the same tool and args. success: false — tool returned an error.

`stream_delta`

{ "type": "stream_delta", "delta": "response fragment..." }

Streaming chunk of the final text response. Accumulate into a string.

`stream_end`

{
  "type": "stream_end",
  "content": "full response text",
  "context_tokens": 4913,
  "max_context_tokens": 65536,
  "elapsed_seconds": 12.4,
  "tool_call_count": 3,
  "token_count": 1842
}

Agent finished. content is the full accumulated text (duplicates the sum of stream_delta). Client should unblock input.

`stream_stopped`

{ "type": "stream_stopped" }

Generation was stopped by POST /sessions/{id}/stop.

`profile_switched`

{
  "type": "profile_switched",
  "profile_id": "server_admin",
  "profile_name": "Server Administrator"
}

Agent switched profile via switch_profile tool. New profile takes effect on the next user message. Client should update the profile indicator. Arrives during the stream — before tool_call for switch_profile.

`context_compressed`

{
  "type": "context_compressed",
  "messages_before": 42,
  "messages_after": 12,
  "summary": "User asked about..."
}

Context was automatically compressed (triggers at ≥80% of context window). Informational.

`heartbeat`

{ "type": "heartbeat" }

Keepalive ping sent every 20 s during long silent operations. Client can ignore.

`session_sync`

{ "type": "session_sync" }

Client must reload session history from GET /sessions/{id}. Sent:

On connect when no run is active (agent may have finished while disconnected).
After a reconnect-replay flow completes (ensures client sees the fully saved response).

`replay_start`

{ "type": "replay_start", "count": 14 }

About to replay count buffered events from a mid-stream reconnect. Client should suppress cursor animations and in-progress effects during replay.

`replay_end`

{ "type": "replay_end" }

Replay complete. Live events will follow.

`error`

{ "type": "error", "message": "Session not found" }

Processing error. Stream may or may not continue after this.

Typical event sequences

Simple question, no tools:

stream_start
thinking_delta × N   (if model has thinking enabled)
thinking_end
stream_delta × N
stream_end

Request with tool calls:

stream_start
turn_thinking         (reasoning before tool selection, if any)
tool_started
tool_call
turn_thinking         (before next tool, if any)
tool_started
tool_call
thinking_delta × N   (final response reasoning)
thinking_end
stream_delta × N
stream_end
context_compressed    (optional, if context was near full)

Request with planning enabled:

stream_start
planning_status       (phase: analysis)
planning_status       (phase: plan)
plan_ready
turn_thinking
tool_started
tool_call
...
stream_end

Request with subagent (spawn_agent):

stream_start
tool_started          (spawn_agent, is_subagent=false)
  turn_thinking       (is_subagent=true)
  planning_status     (is_subagent=true, if subagent has planning)
  plan_ready          (is_subagent=true, if subagent has planning)
  tool_started        (subagent tool, is_subagent=true)
  tool_call           (is_subagent=true)
tool_call             (spawn_agent done, is_subagent=false)
stream_delta × N
stream_end

Reconnect mid-stream:

stream_start
replay_start          {"count": N}
ev_0 ... ev_N-1       (buffered events replayed verbatim)
replay_end
(live events continue)
...
stream_end
session_sync

Profile switch (switch_profile):

stream_start
tool_started          (switch_profile)
profile_switched      (client updates UI here — before tool_call)
tool_call             (switch_profile done)
stream_delta × N
stream_end

Admin

All admin endpoints require admin role or specific permissions.

`GET /admin/sessions`

All sessions across all users. Supports pagination, search, and sorting.

Query params | Param | Default | Description | |---|---|---| | limit | 50 | Page size | | offset | 0 | Items to skip | | search | — | Filter by session_id, name, user_id or profile_id (case-insensitive) | | sort_by | last_active | last_active, created_at, name, profile_id, user_id, pinned | | sort_order | desc | asc or desc |

Response 200

{
  "total": 128,
  "limit": 50,
  "offset": 0,
  "items": [
    {
      "session_id": "...",
      "profile_id": "secretary",
      "user_id": "user-uuid",
      "name": "Research task",
      "message_count": 12,
      "pinned": false,
      "created_at": "2026-05-04T10:00:00+00:00",
      "last_active": "2026-05-04T10:30:00+00:00"
    }
  ]
}

`GET /admin/users`

All registered navi_users.

Response 200

[
  {
    "id": "user-uuid",
    "email": "user@example.com",
    "display_name": "User Name",
    "role": "admin",
    "permissions": ["navi.sessions.read_all"],
    "created_at": "...",
    "updated_at": "..."
  }
]

`GET /admin/memory`

All memory facts (global view). Requires navi.memory.read_all. Supports pagination, search, and sorting.

Query params | Param | Default | Description | |---|---|---| | limit | 50 | Page size | | offset | 0 | Items to skip | | search | — | Filter by key, value or category (case-insensitive) | | sort_by | updated_at | updated_at, category, key, confidence, source | | sort_order | desc | asc or desc | | user_id | — | If set, return only facts for this user instead of global view |

Response 200

{
  "total": 128,
  "limit": 50,
  "offset": 0,
  "items": [
    {
      "id": "...",
      "category": "profile",
      "key": "name",
      "value": "Eugene",
      "source": "conversation",
      "confidence": 90,
      "updated_at": "2026-05-04T10:00:00+00:00"
    }
  ]
}

`GET /admin/profiles`

All profiles including admin-only ones. Requires navi.profiles.manage.

`GET /admin/sessions/{session_id}`

Full session details including messages. Bypasses ownership check.

Response 200

{
  "session_id": "...",
  "profile_id": "secretary",
  "user_id": "user-uuid",
  "name": "Research task",
  "messages": [...],
  "context_token_count": 4913,
  "max_context_tokens": 65536,
  "pinned": false,
  "created_at": "...",
  "last_active": "..."
}

Errors

404 — session not found

`DELETE /admin/sessions/{session_id}`

Delete any session (bypasses ownership). Also deletes session files.

Response 204 — no body

Errors

404 — session not found

`GET /admin/users/{user_id}`

Single user details.

Response 200

{
  "id": "user-uuid",
  "email": "user@example.com",
  "display_name": "User Name",
  "role": "admin",
  "permissions": ["navi.sessions.read_all"],
  "created_at": "...",
  "updated_at": "..."
}

Errors

404 — user not found

`GET /admin/users/{user_id}/sessions`

Sessions owned by a specific user.

Response 200

[
  {
    "session_id": "...",
    "profile_id": "secretary",
    "name": "Research task",
    "message_count": 12,
    "pinned": false,
    "created_at": "...",
    "last_active": "..."
  }
]

`POST /admin/ollama/clear-blacklists`

Manually clear dead-server and dead-model blacklists for the Ollama fallback backend. Useful when a transient failure caused a 5-minute blacklist and you want immediate recovery.

Response 204 — no body

`GET /admin/profiles/{profile_id}`

Full profile configuration including system prompt.

Response 200

{
  "id": "secretary",
  "name": "Personal Secretary",
  "description": "General-purpose assistant",
  "short_description": "...",
  "full_description": {"specialization": "...", "when_to_use": "...", "key_tools": [...]},
  "system_prompt": "...",
  "subagent_system_prompt": "...",
  "llm_backend": "ollama",
  "model": ["gemma4:31b-cloud", "gemma4:26b-a4b-it-q4_K_M"],
  "temperature": 0.65,
  "top_k": null,
  "top_p": null,
  "num_thread": null,
  "max_iterations": 10,
  "planning_enabled": false,
  "planning_mandatory": false,
  "planning_phase1_enabled": true,
  "planning_phase2_enabled": false,
  "planning_phase3_enabled": true,
  "think_enabled": true,
  "iteration_budget_enabled": true,
  "goal_anchoring_enabled": true,
  "goal_anchoring_interval": 5,
  "anti_stall_enabled": true,
  "anti_stall_threshold": 8,
  "step_validation_enabled": false,
  "adaptive_replan_enabled": false,
  "subagent_tools": [...],
  "subagent_planning_enabled": false,
  "subagent_think_enabled": null,
  "enabled_tools": [...],
  "context_providers": [],
  "is_admin_only": false
}

Errors

404 — profile not found

`PUT /admin/profiles/{profile_id}`

Update profile configuration on disk and in-memory. Accepts partial updates — only provided fields are modified.

Request body (partial)

{
  "temperature": 0.5,
  "max_iterations": 20,
  "planning_enabled": true
}

Response 200

{ "ok": true }

Errors

400 — invalid profile data
404 — profile not found

`PATCH /admin/users/{user_id}/role`

Update cached role. Requires admin.

Request body

{ "role": "admin" }

Response 200

{ "ok": true }

`PATCH /admin/profiles/{profile_id}/availability`

Toggle is_admin_only. Requires navi.profiles.manage.

Request body

{ "is_admin_only": true }

Response 200

{ "ok": true }

Webhooks

`POST /webhooks/gnexus-auth`

Receive webhooks from gnexus-auth. Verified via HMAC.

Response 200

{ "ok": true }

Errors

400 — invalid payload
503 — OAuth not configured

Files

Client static: GET /static/** — served from client/ directory. Header Cache-Control: no-store.

Session uploaded files: stored in session_files/{session_id}/. Agent accesses them via the filesystem tool. Deleted after 24 h of session inactivity or when the session is deleted.

Error codes

HTTP	Reason
`400`	Forbidden file type
`404`	Session or profile not found
`413`	File exceeds 200 MB
`500`	Internal agent error
WS `4004`	Session not found on connect