Parallel Search API vs Bing Search API for AI agents
Parallel Search API is a search API built for AI agents that takes a natural-language objective and returns ranked URLs with compressed excerpts. Microsoft's Bing Search APIs were retired on August 11, 2025 and are no longer available.
The short answer
- Parallel Search API: Token-efficient excerpts for agent tool calls, with fast low-cost modes and a free keyless MCP.
- Bing Search API: Nothing for new projects: it is retired; Microsoft points customers to Grounding with Bing Search inside Azure AI Agents.
Side by side
| Parallel Search API | Bing Search API | |
|---|---|---|
| Searches | Parallel's own web index (it says billions of pages, millions added daily). | – |
| Returns | JSON results with URL, title, publish date and LLM-ready excerpts (dense snippets or full page markdown). | – |
| Before the first call | An account and an API key (x-api-key header); the Search MCP works without a key at lower limits. | – |
| Free | Up to 5,000 requests a month free ($5 in free credits a month), plus up to $80 at signup. | – |
| Paid | $0.001 to $0.005 a request for 10 results. | – |
| Acting on a result | Through the web page each result links to | – |
| Limits on keeping or showing results | Outputs may not be copied, cached, stored or reused from previous queries for future uses (beyond what the terms allow). | – |
| AI in its terms | You may not use outputs to create synthetic training data for a language model; Parallel may use customer inputs and outputs to train its own models. | – |
| MCP server | Official Search MCP: https://search.parallel.ai/mcp (free, no API key needed) | – |
Questions people ask
What do I need before I can use Parallel Search API?
An account and an API key (x-api-key header); the Search MCP works without a key at lower limits.
Is Parallel Search API free?
Up to 5,000 requests a month free ($5 in free credits a month), plus up to $80 at signup.
Sources
Every line about another company comes from its own pages. Prices and terms change, so check the source before you rely on one.
Parallel Search API, read on October 15, 2026:
- parallel.ai/pricing: “Run up to 5,000 requests per month for free”
- parallel.ai/pricing: “Earn up to $80 at signup + $5 in free credits per month”
- parallel.ai/products/search: “Billions of pages covering the full depth and breadth of the public web”
- docs.parallel.ai/search/search-quickstart: “takes a natural language objective and returns relevant excerpts optimized for LLMs”
- parallel.ai/customer-terms: “shall not copy, cache, or store any significant portion of any Customer Output”
- parallel.ai/customer-terms: “making available Customer Outputs from previous queries for future uses”
- parallel.ai/customer-terms: “create synthetic training data to develop or train a language model”
- parallel.ai/customer-terms: “Parallel may use Customer IP to train and improve the machine learning and other artificial intelligence models”
- docs.parallel.ai/integrations/mcp/search-mcp: “https://search.parallel.ai/mcp”
- parallel.ai/pricing: “$0.001 - $0.005 for 10 results”
Bing Search API, read on October 15, 2026:
- learn.microsoft.com/en-us/lifecycle/announcements/bing-search-api-retirement: “Bing Search APIs will be retired on August 11, 2025.”
- learn.microsoft.com/en-us/lifecycle/announcements/bing-search-api-retirement: “the product will no longer be available to be used or new customer signup.”
- learn.microsoft.com/en-us/lifecycle/announcements/bing-search-api-retirement: “Customers are encouraged to migrate to Grounding with Bing Search as part of Azure AI Agents.”