# altdata.wiki — The Alternative Data Encyclopedia

> The open hub of alternative data for investment funds: 1667 datasets, 367 providers and 22 signal categories, indexed from public hubs (Hugging Face, Kaggle, Snowflake, AWS Data Exchange) and first-party vendors, each with dataset cards, an encyclopedic article, compliance notes and external citations.

This site is machine-friendly. Prefer the structured interfaces below over scraping HTML.

## Structured access

- [Public API (JSON)](https://altdata.wiki/api/v1/datasets): REST, no key required. Endpoints: /api/v1/datasets, /api/v1/providers, /api/v1/categories. Filters: q, category, org, source, tier, delivery, limit, offset.
- [MCP server](https://altdata.wiki/api/mcp): Model Context Protocol, spec 2026-07-28 (stateless). Optional server/discover; tools: search_datasets, get_dataset, list_providers, get_provider, list_categories.
- [llms-full.txt](https://altdata.wiki/llms-full.txt): extended machine-readable overview of every section and convention.
- [Developers & LLM guide](https://altdata.wiki/developers): human-readable docs, rate limits and access tokens.

## Content map

- [Datasets hub](https://altdata.wiki/datasets): every indexed dataset with tier (featured/premium/open), license, delivery and size.
- [Provider register](https://altdata.wiki/providers): the company behind each signal, with geography, delivery channels and price band.
- [Signal categories](https://altdata.wiki/categories): the categories of alternative data (card transactions, satellite, foot traffic, sentiment…).
- [Encyclopedia](https://altdata.wiki/wiki): provider articles; /wiki/categories/{slug} and /wiki/datasets/{slug} for category and dataset articles.

## Conventions

- Datasets are named `org/name` (slug: org-name).
- Tiers: featured (first-party, TheirStack), premium (paid), open (free).
- External links carry ?source=altdata.wiki for attribution.
- Access tokens for elevated API limits require a Google account: sign in at /account.

## Policies

- Be polite: cache responses; anonymous limit is 200 rows per call, token holders 1000.
- Listings are informational, not investment advice.