Best-effort from research — review these, especially items about per-API subscriptions and pricing that may have changed.
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Each API is a separate subscription — costs add up across multiple APIs. OpenWeb Ninja is not a single platform subscription. If you need Website Contacts Scraper, Local Business Data, and Email Search, that is three separate subscriptions. Subscribing to Pro on all three costs $75/mo, not $25/mo. Audit which APIs you actually need before subscribing, and consider pay-as-you-go ($0.001-0.005/request) for APIs you use infrequently.
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Free tier is very limited (50-500 requests) and varies by API — it is evaluation-only. Some APIs offer 500 free requests per month, others offer only 50. The free tier is rate-limited to 1 request per second and is not suitable for production use. Always check the specific API's free tier allocation before relying on it for testing.
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Rate limits vary by plan AND by API — do not assume uniform limits. A Pro plan on one API might allow 5 requests/sec while Pro on another allows 10/sec. If you are integrating multiple APIs, you need to track rate limits per API independently. Exceeding rate limits returns errors, not queued requests.
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Local Business Data counts per business returned, not per search query. A single search that returns 20 businesses consumes 20 requests from your quota. Large-area searches or broad categories can consume your monthly allocation quickly. Use specific categories and tight geographic filters to control request consumption. Monitor your usage dashboard closely during bulk operations.
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Web Unblocker returns raw HTML, not structured data — you must parse it yourself. Unlike the other APIs that return structured JSON, Web Unblocker gives you the full rendered HTML of a page. You need your own parsing logic (BeautifulSoup, Cheerio, etc.) to extract useful data. Use the structured APIs (Local Business Data, Product Data, etc.) whenever they cover your target data — Web Unblocker is a fallback for sites not covered by specialized APIs.
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RapidAPI vs direct portal pricing may differ — compare before subscribing. OpenWeb Ninja APIs are available both through the app.openwebninja.com portal and the RapidAPI marketplace. Pricing, rate limits, and plan tiers may not be identical across both platforms. If you are cost-sensitive, compare pricing on both before committing. Also note that RapidAPI uses its own API key header (
) while the direct portal may use a different authentication method.
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No native CRM integrations — OpenWeb Ninja is API-only. Unlike platforms with built-in HubSpot/Salesforce connectors, OpenWeb Ninja requires custom integration work to push data into your CRM, spreadsheets, or other tools. Use middleware platforms (Zapier, Make, n8n) or build direct API integrations. Factor in this development effort when evaluating total cost of adoption.
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Email Search returns publicly indexed emails only — these are not verified. The Email Search API discovers email addresses that are publicly available on the web. These emails are not verified for deliverability, may be outdated, and could include role-based addresses (info@, support@). Always run discovered emails through a separate verification service before using them for outreach. Combine with Website Contacts Scraper for more comprehensive coverage.
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Response times vary significantly by endpoint — plan your integration accordingly. Website Contacts Scraper takes 0.5-3 seconds per request, Email Search takes 1-2 seconds, but Web Unblocker (with JS rendering) and Local Business Data (with full detail fetches) can take longer. For high-volume pipelines, implement async processing and queuing rather than synchronous request chains. Timeout settings should be generous (10+ seconds) to account for variability.