Agent-readable source directory
Machine-Readable Market Event Sources
This directory collects public APIs, feeds, and source-linked resources that market-monitoring agents may inspect. It is an observability surface, not trading advice.
Alternate formats: JSON / Markdown.
| Source | Category | Formats | Agent Use |
|---|---|---|---|
| SEC EDGAR APIs | filings | JSON, RSS, bulk ZIP | Monitor submissions, company facts, filing histories, and structured disclosure updates. Auth: no; cadence: throughout the day as filings disseminate; verified: 2026-04-26 |
| Polymarket APIs | prediction-markets | JSON, REST, CLOB API | Discover markets and events through the Gamma API, monitor pricing and order books through public CLOB endpoints, and link market wording to source evidence. Auth: mixed; cadence: market-data endpoints vary by API; verified: 2026-04-26 |
| Kalshi API | prediction-markets | JSON, REST, WebSocket, OpenAPI, AsyncAPI | Monitor event markets, contract metadata, prices, order books, and market status. Auth: mixed; cadence: market-data endpoints vary; WebSocket available; verified: 2026-04-26 |
| FRED Release Dates API | macro | JSON, XML, REST | Build macro release calendars and monitor when economic series are expected to update. Auth: yes; cadence: release calendar / API dependent; verified: 2026-04-26 |
| Federal Reserve RSS Feeds | macro | RSS, XML | Monitor Fed communications and trigger text comparison or source-following workflows. Auth: no; cadence: on publication; verified: 2026-04-26 |
| GDELT Cloud | news-events | JSON API, MCP tools | Monitor global events, clustered stories, entities, summaries, and article evidence. Auth: unknown; cadence: varies by endpoint; verified: 2026-04-26 |
| National Weather Service Alerts API | weather | JSON-LD, CAP XML, Atom | Monitor active alerts through Atom indexes and pull structured alert details as needed. Auth: no; cadence: near real time via Atom indexes; verified: 2026-04-26 |
| PredMktData | prediction-markets | llms.txt, API, WebSocket, Parquet, CSV | Monitor Polymarket market data, historical data, resolution data, and integration guidance through a purpose-built data surface. Auth: mixed; cadence: service dependent; verified: 2026-04-26 |
| Metaculus API | forecasting | JSON, REST | Discover and monitor forecasting questions that may map to public events or prediction-market topics. Auth: unknown; cadence: platform dependent; verified: 2026-04-26 |
| Manifold API | forecasting | JSON, REST | Monitor long-tail forecasting questions, market discussion, and social prediction signals. Auth: mixed; cadence: platform dependent; verified: 2026-04-26 |
| PredScope Prediction Market API | prediction-markets | JSON, REST | Poll normalized prediction-market data for discovery and lightweight monitoring. Auth: no; cadence: documentation advertises frequent updates; verify current cadence; verified: 2026-04-26 |
| BLS Public Data API and RSS | macro | JSON, RSS, XLSX | Monitor official macroeconomic data releases and related RSS/news updates. Auth: mixed; cadence: on official release / endpoint dependent; verified: 2026-04-26 |
| Federal Register API | regulatory | JSON, RSS | Monitor regulatory catalysts and agency actions affecting markets, crypto, banking, energy, healthcare, and other sectors. Auth: no; cadence: on publication / API dependent; verified: 2026-04-26 |
| Treasury FiscalData API | macro | JSON, CSV, XML | Monitor Treasury and fiscal datasets relevant to rates, liquidity, debt issuance, and macro workflows. Auth: no; cadence: dataset dependent; verified: 2026-04-26 |