Serper vs Parallel Search API for AI agents
Serper is a low-cost API that returns Google search results as JSON. Parallel Search API is a search API built for AI agents that takes a natural-language objective and returns ranked URLs with compressed excerpts.
The short answer
- Serper: The cheapest way on this list to get raw Google results in JSON.
- Parallel Search API: Token-efficient excerpts for agent tool calls, with fast low-cost modes and a free keyless MCP.
Side by side
| Serper | Parallel Search API | |
|---|---|---|
| Searches | Google results: web, images, news, maps, places, videos, shopping, scholar, patents, autocomplete. | Parallel's own web index (it says billions of pages, millions added daily). |
| Returns | JSON shaped like a Google results page: organic results with title, link and snippet, knowledge graph, People Also Ask, related searches; places with address, rating and phone. | 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; no credit card for the free queries. | An account and an API key (x-api-key header); the Search MCP works without a key at lower limits. |
| Free | 2,500 free queries, no credit card (the page does not say they renew monthly). | Up to 5,000 requests a month free ($5 in free credits a month), plus up to $80 at signup. |
| Paid | $50 for 50,000 credits ($1.00 per 1,000), credits valid 6 months; down to $0.30 per 1,000 at volume. | $0.001 to $0.005 a request for 10 results. |
| Acting on a result | Through the web page each result links to | Through the web page each result links to |
| Limits on keeping or showing results | Not stated on its pages | Outputs may not be copied, cached, stored or reused from previous queries for future uses (beyond what the terms allow). |
| AI in its terms | Not stated on its pages | 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 | No official server listed | Official Search MCP: https://search.parallel.ai/mcp (free, no API key needed) |
Questions people ask
What do I need before I can use Serper?
An account and an API key; no credit card for the free queries.
Is Serper free?
2,500 free queries, no credit card (the page does not say they renew monthly).
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.
Serper, read on October 15, 2026:
- serper.dev: “Get 2,500 free queries”
- serper.dev: “No credit card required”
- serper.dev: “50k credits ($1.00/1k)”
- serper.dev: “Credits valid for 6 months”
- serper.dev: “The World's Fastest & Cheapest Google Search API”
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”