Bing Web Search API / Bing Grounding

Microsoft's search API, now positioned partly as a 'grounding' data source for Azure AI agents.

What it does

Bing Web Search API / Bing Grounding sits in the category of search APIs: a hosted service that takes a query and returns structured, machine-readable search results instead of leaving you to render and scrape a results page yourself. For an application or an AI agent, that structure — clean JSON fields instead of raw HTML — is the entire value proposition.

Strengths

• Deep integration with Azure AI Foundry and Copilot-style agent stacks
• Coverage of news, images, and video search alongside web results
• Enterprise SLAs and compliance posture attractive to regulated industries

Best-fit use cases

Teams already building on Azure who want search grounding wired into the same cloud and billing account as their model deployments.

Pricing shape

Usage-tiered pricing per transaction, bundled through Azure billing, with volume discounts at higher commitment tiers. As with any usage-billed API, the right plan depends on your query volume and how often your application — or an autonomous agent calling it in a loop — actually needs a fresh search rather than a cached one.

Where it fits in an agent stack

When you're wiring a "web_search" tool into an LLM agent's function-calling schema, the provider you choose determines both the shape of the JSON your parsing code needs to handle and the latency budget for each turn of the agent loop. Bing Web Search API / Bing Grounding is one of several reasonable defaults — see our comparison framework for how to weigh it against alternatives.