Notion Context Source

Source of truth: src/lib/notion/api.ts (REST client), src/lib/db/notion.ts (token persistence), open-sse/mcp-server/tools/notionTools.ts (6 MCP tools), src/app/api/settings/notion/route.ts (settings API). Tool registration and scope wiring lives in open-sse/mcp-server/server.ts.

What it is

OmniRoute can connect to a Notion workspace as a context source — a read/write knowledge base that agents reach through the built-in MCP server. Once a Notion integration token is configured, the MCP tools let an LLM search pages and databases, read page content and block trees, query databases with filters/sorts, and append new blocks — all proxied through OmniRoute (with retry, timeout, and error classification) so the model never touches the Notion API directly.

The integration is a thin, hardened wrapper over the official Notion REST API (https://api.notion.com/v1, Notion-Version: 2026-03-11). The client (src/lib/notion/api.ts) adds:

• Retry with exponential backoff (up to 3 attempts) for 429 and 5xx.
• 55-second request timeout via AbortController.
• Typed error classification — NotionAuthError (401/403), NotionNotFoundError (404), NotionRateLimitError (429, honors retry after hints), NotionValidationError (400/409), NotionServerError (5xx), NotionTimeoutError.
• Message sanitization that strips stack-trace-like fragments before surfacing.

Setup

There is no environment variable for the Notion token — it is stored in the SQLite key_value table (namespace notion, key integration_token) via src/lib/db/notion.ts. Configure it from the Context Sources tab of the Endpoint dashboard (ObsidianSourceCard’s sibling NotionSourceCard), or via the settings REST API.

[!NOTE] The token is a Notion internal integration token. Create an integration at https://www.notion.com/my-integrations, then share the pages/databases you want OmniRoute to access with that integration (Notion’s permission model is share-based, not workspace-wide).

Configure via REST

# Save + validate the integration token (POST validates by issuing a test search)
curl -X POST http://localhost:20128/api/settings/notion \
  -H "Content-Type: application/json" \
  -d '{"token":"ntn_xxx"}'

# Check connection status
curl http://localhost:20128/api/settings/notion

# Disconnect (clears the stored token)
curl -X DELETE http://localhost:20128/api/settings/notion

All three methods require dashboard authentication (isAuthenticated). On POST, OmniRoute saves the token and immediately runs a 1-result test search; if Notion returns an error object the token is cleared and the call fails with 400.

MCP tools (6)

Defined in open-sse/mcp-server/tools/notionTools.ts. The token is resolved at call time via getNotionToken(); if none is configured the tool throws "Notion integration token not configured. Set it in Settings > Context Sources."

Tool	Scope	Description
notion_search	read:notion	Search pages and databases by text query (returns titles, IDs, URLs). Paginated.
notion_get_page	read:notion	Get content and metadata of a page by its ID.
notion_list_block_children	read:notion	List all block children of a block or page (the block tree). Paginated.
notion_query_database	read:notion	Query a database with optional filter + sorts (Notion API format). Paginated.
notion_get_database	read:notion	Get the schema/metadata of a database by ID.
notion_append_blocks	write:notion	Append block children to an existing block or page (max 100 blocks per request).

Input parameters

• notion_search — query (1–500 chars), pageSize (1–100, default 20), startCursor (optional).
• notion_get_page — pageId (32-char hex or UUID).
• notion_list_block_children — blockId, pageSize (1–100, default 50), startCursor (optional).
• notion_query_database — databaseId, filter (optional, Notion filter format), sorts (optional array), pageSize (1–100, default 50), startCursor (optional).
• notion_get_database — databaseId.
• notion_append_blocks — blockId, children (array of block objects), after (optional position).

Scopes

The read tools require read:notion and the write tool requires write:notion. Scopes are enforced by withScopeEnforcement() in open-sse/mcp-server/server.ts only when OMNIROUTE_MCP_ENFORCE_SCOPES=true; the caller’s allowed scopes come from OMNIROUTE_MCP_SCOPES (comma-separated) or the authenticated API key’s scope context. See MCP-SERVER.md for the full scope model.

Endpoints

Method	Path	Purpose
GET	/api/settings/notion	Return { connected, hasToken }.
POST	/api/settings/notion	Save + validate the integration token.
DELETE	/api/settings/notion	Disconnect (clear the stored token).

These are dashboard settings routes. There is no public /v1 Notion proxy endpoint — Notion is reached exclusively through the MCP tools above.

Use cases

• Knowledge-grounded answers — let an agent notion_search the workspace and notion_get_page the top hit before answering, so responses cite real internal docs.
• Database-backed workflows — notion_query_database a tasks/CRM database with filters + sorts, then summarize or triage the rows.
• Write-back / logging — notion_append_blocks to append meeting notes, run summaries, or agent output into an existing page (append-only; no destructive edits).
• Structure exploration — notion_list_block_children to walk a page’s block tree, or notion_get_database to discover a database’s property schema before querying it.

Related

• MCP Server — transports, scope enforcement, full tool inventory.
• Obsidian Context Source — the other built-in context source.
• Memory System — persistent conversational memory (complementary context layer, injected automatically rather than tool-fetched).

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