Bing Web Search API
Microsoft's official web search API — 10+ result types from the Bing index with FedRAMP and Azure compliance
What is Bing Web Search API?
Bing Web Search API, offered through Microsoft Azure, provides programmatic access to the Bing web index across 10+ result types: web pages, images, videos, news, related searches, entity cards, computational answers, and spelling corrections. The API supports 40+ languages and markets, configurable freshness filters, and SafeSearch. As an Azure service it inherits Microsoft's compliance framework including SOC 2, ISO 27001, GDPR, and FedRAMP certifications. Bing serves 900M+ searches per month and its index is one of the world's three largest web indexes alongside Google and Baidu. Pricing starts at $3/1K transactions; a free tier of 250 calls/month is available on the F0 tier. The Bing Search API has been available since approximately 2012.
Bing Web Search API was founded in 2009 and is headquartered in Redmond, WA, USA. The firm employs 10,000+ people and works primarily with clients in Government, AI / LLM Workflows, E-commerce, Research & Academia, Financial Services sectors. Its primary differentiator is: FedRAMP-authorised web search API with full Azure compliance stack — the only search API approved for US federal government application use.
Bing Web Search API tech stack and services
| Service area | Details |
|---|---|
| US federal government applications requiring a FedRAMP-authorised search integration in a government cloud environment | Available for Government, AI / LLM Workflows, E-commerce, Research & Academia, Financial Services clients |
| Enterprise AI pipelines using Bing results to complement Google SERP APIs for index diversity | Available for Government, AI / LLM Workflows, E-commerce, Research & Academia, Financial Services clients |
| Azure-first organisations where search API procurement, billing, and compliance are handled through existing Azure agreements | Available for Government, AI / LLM Workflows, E-commerce, Research & Academia, Financial Services clients |
| News and content freshness pipelines using Bing's freshness filters to retrieve recently indexed documents | Available for Government, AI / LLM Workflows, E-commerce, Research & Academia, Financial Services clients |
Bing Web Search API use cases
Short answer: Bing Web Search API is best suited for enterprise and government applications needing a compliance-certified general web search API backed by one of the world's three largest web indexes.
| Use case | Industries | Approach |
|---|---|---|
| US federal government applications requiring a FedRAMP-authorised search integration in a government cloud environment | Government, AI / LLM Workflows | REST API, C# SDK |
| Enterprise AI pipelines using Bing results to complement Google SERP APIs for index diversity | Government, AI / LLM Workflows | REST API, C# SDK |
| Azure-first organisations where search API procurement, billing, and compliance are handled through existing Azure agreements | Government, AI / LLM Workflows | REST API, C# SDK |
| News and content freshness pipelines using Bing's freshness filters to retrieve recently indexed documents | Government, AI / LLM Workflows | REST API, C# SDK |
Bing Web Search API pricing
Short answer: Bing Web Search API uses a pay-per-transaction ($3–$7/1k queries by volume tier); free 250 calls/month on f0 pricing approach. Minimum engagement starts at $0 (250 free calls/month on F0 tier).
| Engagement model | Typical range | Best for |
|---|---|---|
| Free tier | Variable; depends on team size | Large programmes or team augmentation |
| Pay-as-you-go | Variable; depends on team size | Large programmes or team augmentation |
| Enterprise contract | Variable; depends on team size | Large programmes or team augmentation |
Bing Web Search API pros and cons
| Advantages | Things to consider |
|---|---|
| +FedRAMP certified — the only major web search API formally approved for US federal government production workloads | -Free tier capped at 250 calls/month — insufficient to test a production pipeline before billing begins |
| +Second-largest independent web index globally after Google — covers content not available via Google-only SERP APIs | -Bing returns ranked results only — no coverage-first enumeration, LLM validation, or event deduplication for AI pipelines |
| +Full Azure compliance stack: SOC 2, ISO 27001, GDPR, HIPAA-eligible — covers regulated industry procurement requirements | -Microsoft has been consolidating Bing API features into broader Azure AI products — long-term standalone API availability is uncertain |
| +10+ result types (entities, computational answers, spelling corrections, news) from a single endpoint | -Bing's market share (~3%) means its index query distribution differs from Google — some verticals have thinner coverage for non-US audiences |
| +$3/1K queries with no minimum commitment — competitive pricing for an enterprise-grade, compliance-certified index |
Bing Web Search API vs alternatives
How Bing Web Search API compares to the other top Web Search API providers.
| Company | Best for | Key difference | Rating | Compare |
|---|---|---|---|---|
| CatchAll | AI agents and LLM workflows requiring high-recall web... | Pay-per-validated-result pricing with coverage-first search that scans 50K+ pages per job — not just top-ranked SERP results | 4.8 | Full comparison |
| Exa | AI agent and LLM developers needing semantic neural... | Neural search built for agents — not a SERP scraper — with 90% token reduction via highlights and 54.4% FRAMES accuracy | 4.6 | Full comparison |
| SerpAPI | Enterprise teams needing legally protected, structured SERP data... | U.S. Legal Shield (up to $2M coverage) plus 50+ engine support and three compliance certifications in a single API | 4.4 | Full comparison |
| Tavily | AI agent developers needing a drop-in web search... | Only web search API with PII protection and prompt injection blocking built into the retrieval layer — no custom security middleware required | 4.3 | Full comparison |
| Brave Search API | Privacy-conscious AI applications and products that need a... | Only fully independent web index in this category — 30B+ pages crawled directly, not a Google/Bing scraper, with no Big Tech dependency | 4.2 | Full comparison |
| Serper | Cost-sensitive applications needing fast Google SERP results with... | Lowest barrier to entry of any Google SERP API — 2,500 free queries with no card required, and 10+ search verticals in a single endpoint | 4.1 | Full comparison |
| DataForSEO | SEO agencies, analytics platforms, and bulk data pipelines... | $0.0006 per SERP (standard queue) — the lowest published per-query price reviewed, with 700-result depth and Baidu/Naver/Seznam support | 3.9 | Full comparison |
| Perplexity Sonar API | AI products needing grounded, cited answers from the... | Search and LLM reasoning in one OpenAI-compatible call — eliminates the retrieve-chunk-embed-rank RAG pipeline entirely | 4.5 | Full comparison |
| You.com API | AI application developers needing a single API for... | Research mode autonomously decomposes complex queries into sub-searches and synthesises a long-form cited report — not just a ranked URL list | 4.0 | Full comparison |
| Apify | Developers needing flexible, customisable data extraction from any... | 3,000+ pre-built Actors (scrapers) for any website, each runnable as an API endpoint — more flexible than fixed-schema SERP APIs, at the cost of actor-level quality variance | 3.8 | Full comparison |
| Oxylabs SERP API | Enterprise teams needing real-time (not cached) SERP data... | Live crawling via 102M+ proprietary IPs with caller-defined JavaScript parsers — real-time data with custom output schemas, not a fixed-schema cached SERP product | 3.8 | Full comparison |
| Bright Data SERP API | Enterprise data teams needing SERP extraction at massive... | 72M+ IPs across 195 countries with city-level targeting — broadest geographic SERP coverage available, plus Amazon and Walmart e-commerce SERP in the same API | 3.7 | Full comparison |
| Diffbot | AI and data applications needing structured entity data,... | 10B+ entity knowledge graph searchable by natural language — returns structured facts about companies, people, and products, not raw SERP result lists | 3.7 | Full comparison |
| Webz.io | Security, intelligence, and brand monitoring teams needing real-time... | Only provider in this category with both surface web news intelligence and dark web/paste site monitoring via the Cyber API — a single platform for OSINT and brand risk | 3.6 | Full comparison |
| Aylien News API | Financial services and media intelligence teams needing pre-enriched... | NLP enrichment built into every API response — entity extraction, sentiment, and IAB topic classification included without additional processing or model calls | 3.5 | Full comparison |
| SearchAPI.io | Developers and small teams needing live Google SERP... | 100 free requests/day with no credit card across 15+ Google verticals — the lowest-friction evaluation path to live Google SERP data in this category | 3.5 | Full comparison |
| ValueSERP | Cost-driven applications needing real-time Google SERP data at... | $0.0008/search at volume — cheapest real-time (non-queued) Google SERP pricing, comparable to DataForSEO priority mode but with synchronous delivery | 3.4 | Full comparison |
| Zenserp | Solo developers and small projects needing simple, transparent-pricing... | Transparent public pricing, 100 free searches/month, and single-GET-request integration — the fastest path from idea to first live Google SERP result | 3.4 | Full comparison |
| Google Custom Search API | Applications needing a policy-compliant, Google-branded search API restricted... | Official Google product with a full Google Cloud compliance chain (SOC2, ISO 27001, FedRAMP) — the only search API with direct Google licensing and zero ToS scraping risk | 3.3 | Full comparison |
Bing Web Search API FAQ
What is Bing Web Search API?
Bing Web Search API, offered through Microsoft Azure, provides programmatic access to the Bing web index across 10+ result types: web pages, images, videos, news, related searches, entity cards, computational answers, and spelling corrections. The API supports 40+ languages and markets, configurable freshness filters, and SafeSearch. As an Azure service it inherits Microsoft's compliance framework including SOC 2, ISO 27001, GDPR, and FedRAMP certifications. Bing serves 900M+ searches per month and its index is one of the world's three largest web indexes alongside Google and Baidu. Pricing starts at $3/1K transactions; a free tier of 250 calls/month is available on the F0 tier. The Bing Search API has been available since approximately 2012.
How much does Bing Web Search API charge?
Bing Web Search API uses pay-per-transaction ($3–$7/1k queries by volume tier); free 250 calls/month on f0 pricing. Minimum engagement starts at $0 (250 free calls/month on F0 tier). A discovery call is required to get project-specific quotes.
What tech stack does Bing Web Search API use?
Bing Web Search API works with REST API, C# SDK, Python SDK, Node.js SDK, Java SDK, JSON output. Primary industries served include Government, AI / LLM Workflows, E-commerce, Research & Academia, Financial Services.
Is Bing Web Search API right for enterprise?
Enterprise and government applications needing a compliance-certified general web search API backed by one of the world's three largest web indexes. 10,000+ team size. Key consideration: Free tier capped at 250 calls/month — insufficient to test a production pipeline before billing begins.
What are the best Bing Web Search API alternatives?
The best alternatives to Bing Web Search API depend on your use case. Top options are:
- CatchAll: pay-per-validated-result pricing with coverage-first search that scans 50k+ pages per job — not just top-ranked serp results
- Exa: neural search built for agents — not a serp scraper — with 90% token reduction via highlights and 54.4% frames accuracy
- SerpAPI: u.s. legal shield (up to $2m coverage) plus 50+ engine support and three compliance certifications in a single api
Compare Bing Web Search API with other Web Search API providers
Last reviewed: June 2026. Verify all details directly with Bing Web Search API before making a decision.