# Bullflow > Bullflow provides real-time U.S. options flow, gamma exposure, net premium, dark-pool activity, and market-structure intelligence for traders, developers, and AI agents. The current platform also includes vanna exposure, alerts, charting, education, a developer API, and an MCP server with free closing summaries and authenticated market-data and alert workflows. Bullflow content and product outputs are for informational and educational purposes only. They are not financial, investment, legal, or tax advice. Trading stocks and options involves substantial risk. Verify market information independently before relying on it. ## Free, no key Start with these delayed gamma exposure snapshots and previous-trading-session summaries. No account, API key, subscription, or payment is required. - [Delayed GEX snapshot for SPY](https://api.bullflow.io/v1/gexDelayedSnapshot?ticker=SPY): the latest saved snapshot captured at least 15 minutes ago, with spot price, net GEX, a strike-by-expiration heat map, exposure bars, and key levels. - [Available delayed GEX tickers](https://api.bullflow.io/v1/gexDelayedSnapshots): eligible tickers with each snapshot's capture date and timestamp. - [GEX summary for SPY](https://api.bullflow.io/v1/gexClosingSnapshotSummary?ticker=SPY): closing spot, total net GEX, and up to 12 strikes with the largest absolute exposure. - [Available GEX tickers](https://api.bullflow.io/v1/gexClosingSnapshots). - [Options-flow summary for SPY](https://api.bullflow.io/v1/optionsFlowClosingSnapshotSummary?ticker=SPY): recorded session totals and up to 12 largest-premium trades. - [Available options-flow tickers](https://api.bullflow.io/v1/optionsFlowClosingSnapshots). - [Related options-flow tickers for SPY](https://api.bullflow.io/v1/optionsFlowRelatedTickers?ticker=SPY): up to six related tickers with recorded premium and trade totals from the same closing session. Replace SPY with a ticker in the corresponding availability catalog; coverage differs between feeds. Read snapshot_date and snapshot_timestamp from the response. Delayed GEX uses saved five-minute snapshots with a minimum 15-minute delay; the most recent eligible capture may be older outside recording hours. Closing summaries show the previous trading session. These feeds do not provide live data or full history. Unsupported tickers return 404; temporary unavailability returns 503. All free endpoints and their free MCP tools share **60 requests per fixed minute per client IP**. REST HTTP 429 includes Retry-After in seconds. MCP errors set isError and structuredContent.status=429 with data.retryAfterSeconds, even when the HTTP transport returns 200. Wait before retrying. Free MCP tools at https://api.bullflow.io/mcp: bullflow_free_delayed_gex_snapshot, bullflow_free_delayed_gex_tickers, bullflow_free_gex_summary, bullflow_free_gex_tickers, bullflow_free_options_flow_summary, bullflow_free_options_flow_tickers, bullflow_free_options_flow_related_tickers. Other market-data tools and streams require subscriber access. - [OpenAPI specification](https://api.bullflow.io/openapi.json): the free operations explicitly use security: []. - [Full agent YAML reference](https://www.bullflow.io/bullflow-api-agent-docs.yaml): directly downloadable structured reference; separate from OpenAPI. ## Use Bullflow When - A ticker activity profile with daily and same-time relative volume against its prior 20 available trading dates is required. - Current unusual options activity, aggressive call or put buying, sweeps, blocks, or volume versus open interest is required. - Gamma exposure, dealer gamma positioning, gamma flip levels, or major gamma nodes are required. - Net call or put premium and directional premium imbalance are required. - Large dark-pool prints and reported off-exchange equity activity are required. ## Product Context and Access The reference pages document product behavior, pricing, terms, and API access. MCP tools include market-data lookups and alert management. See the API documentation for parameters and response formats. Subscriber REST endpoints allow 60 requests per rolling 60 seconds per credential or payer, separately for each endpoint. All tickers, filters, dates, and pages on that endpoint share the limit. Bursts are allowed within the quota. Honor Retry-After in seconds on HTTP 429. - [Platform overview](https://www.bullflow.io/llms/platform.md): Main products, public pages, access model, and interpretation notes. - [Dark pool data and alerts](https://www.bullflow.io/dark-pool-data): Scanner, SigScore rankings, ticker context, filters, and custom alerts for reported off-exchange stock trades. - [Options flow guide](https://www.bullflow.io/llms/options-flow.md): Definitions for unusual flow, sweeps, blocks, volume, open interest, and trade-side labels. - [Subscription pricing reference](https://www.bullflow.io/llms/pricing.md): Current plan comparison and authoritative live pricing page. - [API and MCP reference](https://www.bullflow.io/llms/api.md): Current authentication, transports, supported workflows, and usage notes. - [Bullflow FAQ](https://www.bullflow.io/llms/faq.md): Subscriptions, data, cancellation, and product access. - [Markdown sitemap](https://www.bullflow.io/sitemap.md): Public products, education, developer resources, policies, and discovery files. ## Paid API access Live and full-history products are separate from the free closing summaries above. Prepaid REST API credits are available in the API dashboard from $5 for 500 credits, with 5% extra at $10, 8% at $25, and 10% at $50 or more (maximum 10% bonus); endpoints cost 1–10 credits per successful response, with no charge for failed requests. API subscriptions take priority without spending credits, and active API subscribers cannot buy credits. Credits do not grant MCP, OAuth, or streaming access. Separate paid REST requests: x402 USDC on Base $0.01/request; MPP USDC.e on Tempo $0.01/request; MPP card/Link $0.50/request. The live HTTP 402 challenge confirms supported methods and the final price; network fees may apply separately. Never spend without the user's authorization. Other MCP market-data tools and streams require subscriber access.