0xinsider API Documentation

Docs for the 0xinsider API: prediction-market data for agents, bots, and research tools.

What is 0xinsider?

0xinsider provides trader grades, whale trades, smart-money flow, positions, and insider signals across Polymarket and Kalshi.

API endpoints

• Trader — grades, P&L, win rate, and strategy
• Leaderboard — traders ranked by score
• Whale Trades — large trades with grade and category filters
• Explore Markets — whale-active markets by category, platform, and status
• Market Intel — smart-money flow and top positions
• Search Markets — markets by keyword and filters
• Insider Radar — unusual timing and accumulation patterns

MCP Server

Connect AI agents to 0xinsider via the Model Context Protocol:

npx -y @0xinsider/mcp init

Supports Claude Code, Cursor, Codex, Gemini CLI, and other stdio-compatible MCP clients.

See the MCP docs and the npm package for setup details.

Local development

Install Mintlify CLI:

npm i -g mint

Preview locally:

mint dev

Open `http://localhost:3000`.

Check that every OpenAPI operation has a Mintlify endpoint page and navigation

entry:

python3 scripts/check-openapi-parity.py

The docs OpenAPI spec (`api-reference/openapi.json`) is a synced copy of the

app's canonical spec (`web/public/api/v1/openapi.json` in the 0xinsider repo),

which is the single source of truth. After re-syncing it, confirm the two specs

are structurally identical (run from a sibling checkout, or adjust the path):

cp ../0xinsider/web/public/api/v1/openapi.json api-reference/openapi.json
python3 scripts/generate-objects-reference.py
python3 scripts/check-spec-sync.py --app-spec ../0xinsider/web/public/api/v1/openapi.json
python3 scripts/check-openapi-parity.py

Links

• API docs
• API changelog
• Terminal
• Product changelog
• Support