# PerpFinder > Independent perpetual-futures market intelligence covering DEX and CEX volume, fees, funding rates, open interest, spread, slippage, fill capacity and total trading cost. PerpFinder compares crypto derivatives venues using public venue APIs, on-chain data and its own live order-book measurements. Inclusion and rankings are not sold. Affiliate revenue funds the data infrastructure and is disclosed separately from editorial analysis. ## Preferred entry points - [Live market dashboard](https://perpfinder.com): Perpetual-futures venue rankings and current market totals. - [How PerpFinder tests exchanges](https://perpfinder.com/how-we-test): Measurement process, rating criteria and limitations. - [Canonical data definitions](https://perpfinder.com/data-definitions): Definitions for volume, open interest, funding, spread, slippage and total cost. - [Human-readable API documentation](https://perpfinder.com/docs/api): Stable public datasets, fields, limits and examples. - [OpenAPI 3.1 specification](https://perpfinder.com/openapi.json): Machine-readable public API contract. - [Public API manifest](https://perpfinder.com/api-manifest): Compact JSON endpoint inventory and citation guidance. - [Full AI catalogue](https://perpfinder.com/llms-full.txt): Complete page index, metric definitions, API endpoints and venue fact sheets. ## Machine discovery - [Crawler policy](https://perpfinder.com/robots.txt): Public pages are open; private API, internal and outbound redirect paths remain blocked. - [Canonical XML sitemap](https://perpfinder.com/sitemap.xml): Indexable canonical pages with evidence-based last-modified dates. - Retrieval and citation access is explicitly open for OpenAI, Anthropic, Perplexity, DuckAssist, Mistral and Amazon search/user agents. - Search-index access is explicitly open for Googlebot, bingbot, Applebot and DuckDuckBot. Google Search and Gemini use canonical indexed HTML; Google does not treat llms.txt as a special ranking or AI inclusion signal. - GPTBot, ClaudeBot, Google-Extended, CCBot, Applebot-Extended and Amazonbot are separate model-use controls. Their access does not guarantee citation. - xAI documents web search and source citations but no official crawler token. Grok access therefore follows the public wildcard policy; no unverified xAI bot name is declared here. - llms.txt and llms-full.txt are supplementary routing documents. Canonical HTML, visible text, structured data and timestamped API responses remain the authoritative sources. ## Core research and live data - [Perp DEX rankings](https://perpfinder.com/perps): DEX volume, fees, chains, leverage and venue profiles. - [CEX exchange reviews](https://perpfinder.com/exchanges): Centralized derivatives venues and fee context. - [Fee comparison](https://perpfinder.com/fees): Maker and taker fee comparison with fee-model context. - [Funding rates](https://perpfinder.com/funding-rates): Current, predicted and realized rates kept as separate types. - [Open interest](https://perpfinder.com/open-interest): Venue-level and aggregate open interest. - [Total cost comparison](https://perpfinder.com/tools/cost-comparison): Fee plus half-spread plus size-dependent slippage. - [TVL rankings](https://perpfinder.com/tvl): On-chain protocol TVL. - [RWA perp markets](https://perpfinder.com/rwa-markets): Tokenized equities, FX and commodity perpetuals. ## Citation and interpretation - Attribute republished data as "Data: PerpFinder" with a link to [PerpFinder](https://perpfinder.com). - Preserve each response's dataStatus, coverage, generatedAt and upstreamTimestamp fields when available. - A partial, preliminary, collecting or stale response must not be described as complete or current. - Missing values are null, not zero. Spread is the full bid/ask width; total execution cost counts the one-sided half-spread once. - Editorial pages link to methodology and source material. Corrections are published at [Corrections](https://perpfinder.com/corrections). ## Publisher identity - [About and editorial independence](https://perpfinder.com/about) - [Data team responsibilities](https://perpfinder.com/team/data) - [Terms and data-use conditions](https://perpfinder.com/terms) - [PerpFinder on X](https://x.com/PerpFinderCom) - [PerpFinder on YouTube](https://www.youtube.com/@PerpFinderCom)