Built-in MCP Servers

Pre-built MCP servers you can add to agents without hosting or configuring a server URL.

Built-in MCP servers are pre-built tool collections hosted and maintained for you. Import them directly from @inkeep/agents-sdk and add them to any agent — no server URL required. Search servers require a credential to be configured.

Available servers

Export	Server	Description
`INKEEP_COREUTILS`	`inkeep-coreutils`	Core text and data tools: search, replace, slice, diff, patch, window, JSON, encoding, hash, HTML, and utilities
`INKEEP_HTTP`	`inkeep-http`	Outbound HTTP requests via curl
`INKEEP_MEDIA`	`inkeep-media`	Image processing: info, resize, crop
`INKEEP_SEARCH.EXA`	`inkeep-search-exa`	Web search powered by Exa. Requires a credential.
`INKEEP_SEARCH.TAVILY`	`inkeep-search-tavily`	Web search powered by Tavily. Requires a credential.
`INKEEP_SEARCH.BRAVE`	`inkeep-search-brave`	Web search powered by Brave. Requires a credential.
`INKEEP_SEARCH.SERPAPI`	`inkeep-search-serpapi`	Web search powered by SerpAPI. Requires a credential.

Usage

import { subAgent } from "@inkeep/agents-sdk";
import { INKEEP_COREUTILS, INKEEP_SEARCH } from "@inkeep/agents-sdk";

const myAgent = subAgent({
  id: "my-agent",
  name: "My Agent",
  description: "An agent with access to built-in tools",
  prompt: "You are a helpful assistant.",
  canUse: () => [INKEEP_COREUTILS, INKEEP_SEARCH.TAVILY],
});

Selecting specific tools

Use .with() to enable only a subset of tools:

import { INKEEP_COREUTILS, INKEEP_COREUTILS_TOOLS } from "@inkeep/agents-sdk";

canUse: () => [
  INKEEP_COREUTILS.with({
    selectedTools: [
      INKEEP_COREUTILS_TOOLS.TEXT_SEARCH,
      INKEEP_COREUTILS_TOOLS.TEXT_REPLACE,
      INKEEP_COREUTILS_TOOLS.JSON_QUERY,
    ],
  }),
]

Tool reference

INKEEP_COREUTILS

Tool	Description
`text_search`	Search for a pattern in text. Supports regex, case control, context lines, invert match, and count mode.
`text_replace`	Find and replace text. Supports literal or regex patterns, global or single replacement, and capture group references.
`text_slice`	Extract a contiguous portion of text by line range, character range, or pattern-bounded range.
`text_diff`	Generate a unified diff between two strings.
`text_patch`	Apply a unified diff patch to a string.
`text_window`	Return the first N lines, last N lines, or both from text.
`json_format`	Pretty-print a JSON string or object.
`json_query`	Extract a value from a JSON object using a JMESPath expression.
`json_merge`	Deep or shallow merge two JSON objects.
`json_diff`	Show structural differences between two JSON values.
`base64_encode`	Encode a string to base64.
`base64_decode`	Decode a base64 string to UTF-8 text.
`url_encode`	Percent-encode a string for use in a URL.
`url_decode`	Decode a percent-encoded URL string.
`hash`	Compute a cryptographic hash (MD5, SHA-1, SHA-256, SHA-512).
`html_to_markdown`	Convert HTML to Markdown.
`calculate`	Evaluate a numeric arithmetic expression.
`uuid`	Generate a random UUID (v4).
`timestamp`	Get the current date/time in ISO, Unix, UTC, or locale format.

INKEEP_HTTP

Tool	Description
`curl`	Make an outbound HTTP request and return the response.

INKEEP_MEDIA

Tool	Description
`image_info`	Get metadata about an image (dimensions, format, size).
`image_resize`	Resize an image to specified dimensions.
`image_crop`	Crop an image to a specified region.

INKEEP_SEARCH

Each search provider is a separate server. Use INKEEP_SEARCH.EXA, INKEEP_SEARCH.TAVILY, INKEEP_SEARCH.BRAVE, or INKEEP_SEARCH.SERPAPI.

Tool	Description
`web_search`	Search the web and return relevant results.

Note

Built-in servers can also be added from the Visual Builder under Tools → Built-in Servers, without writing any code.

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