# Perplexity — MCP Server 1.0: now backed by the Agent API

- Company: Perplexity (perplexity.ai)
- Announced: 2026-07-23T19:36:29+00:00
- Category: developer-tool-release
- Subject: Sonar
- Source: https://docs.perplexity.ai/docs/resources/changelog#july-2026
- Record: https://forck.live/items/5069-mcp-server-1-0-now-backed-by-the-agent-api

Perplexity released MCP Server v1.0.0, moving its model-backed tools from legacy Sonar models to Agent API presets (fast, medium, high). The update brings faster and cheaper performance, streaming progress for long-running research, and cancellation support. The strip_thinking and reasoning_effort parameters were removed.

## Evidence

Verbatim from https://docs.perplexity.ai/docs/resources/changelog#july-2026:

> The Perplexity MCP Server v1.0.0 moves its model-backed tools from the legacy Sonar models to Agent API presets: perplexity_ask uses the fast preset, perplexity_reason uses medium, and perplexity_research uses high. Tool names and response shapes are unchanged, and all three tools are faster and cheaper on average than their Sonar predecessors. Long-running research now streams progress to MCP clients that request it, and cancelling an MCP request cancels the underlying run.

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