Search the web

Exa

Web search API with its own index that returns ranked pages with full text, highlights or summaries.

Methods

Method	Used for	How
API key	REST API, SDKs	`x-api-key` header, or `Authorization: Bearer <EXA_API_KEY>`
OAuth	Hosted MCP server	Connect to `https://mcp.exa.ai/mcp?login` and sign in to Exa in the browser
Keyless	Hosted MCP server (search and fetch)	Connect to `https://mcp.exa.ai/mcp` at a free rate limit
x402 or MPP	`/search` and `/contents` without an account	Pay per request in USDC

Source4Exa MCP

Getting access

Who creates the account: A person; an agent cannot register itself3
Where to get a key: Dashboard at https://dashboard.exa.ai/api-keys3
Other requirements: None for the free tier; a card to buy credit beyond it2

Read from Exa Labs’s own pages on 2026-11-04. Every number links to the page a value came from. For agents, the same facts as markdown: /tools/search-the-web/exa.md