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Nebula
Real-time social intelligence for stocks and global markets.
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NewMeet Nebula MCPMarket intelligence for agents
Understanding
Understanding
human systems
We build AI to understand markets.
Hidden Systems · What we do01 / 05
We build AI to understand markets, behaviour, decisions, and collective systems.
Scenario intelligenceClosed beta
Meridian
Institutional market intelligence and decision support.
Learn moreHidden Systems · Developers03 / 05
One API.
Every market signal.
Build with sentiment, mindshare, narratives, and market actors. Use an API key, or pay for eligible reads from your wallet with x402. No Nebula account required for wallet payments.
- Stocks first
- Equity market intelligence
- One contract
- REST, MCP, and CLI
- x402 payments
- Pay per request with USDC on Base
$ curl "https://nebula-api.hiddensystems.ai/api/v1/public/assets?query=NVDA&asset_class=equity" \
-H "X-API-Key: $NEBULA_API_KEY"Hidden Systems · Research04 / 05
Latest research
All posts
Social simulation · Aug 8, 2026 · 14 min read01Simulating SocietyAn examination of interaction, exposure, uncertainty and empirical validation in agent-based social simulation.Read article
Behavioural simulation · Aug 8, 2026 · 14 min read02Modelling Human ActionAn examination of evidence, exposure, memory and evaluation in actor-level behavioural prediction.Read article
Forecasting science · Aug 7, 2026 · 15 min read03Calibration and Collective JudgmentAn examination of calibration, forecast aggregation, shared error and prospective evaluation in human and AI forecasting.Read article
Hidden Systems · Access05 / 05
- Dedicated onboarding and support
- Custom usage limits
- Bespoke data and integrations
- Commercial terms and invoicing
- Early access to new capabilities