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Glean TypeScript API Client

The Glean TypeScript SDK provides convenient access to the Glean REST API in both browser and Node.js environments. It offers full TypeScript types, modern async/await support, and uses the fetch API under the hood.

Unified SDK Architecture

This SDK combines both the Client and Indexing API namespaces into a single unified package:

  • Client API: Used for search, retrieval, and end-user interactions with Glean content
  • Indexing API: Used for indexing content, permissions, and other administrative operations

Each namespace has its own authentication requirements and access patterns. While they serve different purposes, having them in a single SDK provides a consistent developer experience across all Glean API interactions.

// Example of accessing Client namespace
const glean = new Glean({
  serverURL: "https://mycompany-be.glean.com",
  apiToken: 'client-token'
});

await glean.client.search.query({ 
  query: 'search term' 
});

// Example of accessing Indexing namespace 
const glean = new Glean({
  serverURL: "https://mycompany-be.glean.com",
  apiToken: 'indexing-token'
});

await glean.indexing.documents.index({ 
  /* document data */ 
});

Remember that each namespace requires its own authentication token type as described in the Authentication Methods section.

Summary

Glean API: # Introduction In addition to the data sources that Glean has built-in support for, Glean also provides a REST API that enables customers to put arbitrary content in the search index. This is useful, for example, for doing permissions-aware search over content in internal tools that reside on-prem as well as for searching over applications that Glean does not currently support first class. In addition these APIs allow the customer to push organization data (people info, organization structure etc) into Glean.

Usage guidelines

This API is evolving fast. Glean will provide advance notice of any planned backwards incompatible changes along with a 6-month sunset period for anything that requires developers to adopt the new versions.

API Clients

Official API clients for the Glean Indexing API are available in multiple languages:

These API clients provide type-safe, idiomatic interfaces for working with Glean IndexingAPIs in your language of choice.

Table of Contents

SDK Installation

The SDK can be installed with either npm, pnpm, bun or yarn package managers.

NPM

npm add @gleanwork/api-client
# Install optional peer dependencies if you plan to use React hooks
npm add @tanstack/react-query react react-dom

PNPM

pnpm add @gleanwork/api-client
# Install optional peer dependencies if you plan to use React hooks
pnpm add @tanstack/react-query react react-dom

Bun

bun add @gleanwork/api-client
# Install optional peer dependencies if you plan to use React hooks
bun add @tanstack/react-query react react-dom

Yarn

yarn add @gleanwork/api-client
# Install optional peer dependencies if you plan to use React hooks
yarn add @tanstack/react-query react react-dom

Note

This package is published with CommonJS and ES Modules (ESM) support.

Requirements

For supported JavaScript runtimes, please consult RUNTIMES.md.

SDK Example Usage

Example 1

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.client.chat.create({
    messages: [
      {
        fragments: [
          {
            text: "What are the company holidays this year?",
          },
        ],
      },
    ],
  });

  console.log(result);
}

run();

Example 2

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.client.chat.createStream({
    messages: [
      {
        fragments: [
          {
            text: "What are the company holidays this year?",
          },
        ],
      },
    ],
  });

  console.log(result);
}

run();

Authentication

Per-Client Security Schemes

This SDK supports the following security scheme globally:

Name Type Scheme Environment Variable
apiToken http HTTP Bearer GLEAN_API_TOKEN

To authenticate with the API the apiToken parameter must be set when initializing the SDK client instance. For example:

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.agents.search({
    name: "HR Policy Agent",
  });

  console.log(result);
}

run();

Authentication Methods

Glean supports different authentication methods depending on which API namespace you're using:

Client Namespace

The Client namespace supports two authentication methods:

  1. Manually Provisioned API Tokens

    • Can be created by an Admin or a user with the API Token Creator role
    • Used for server-to-server integrations

  2. OAuth

    • Requires OAuth setup to be completed by an Admin
    • Used for user-based authentication flows

Indexing Namespace

The Indexing namespace supports only one authentication method:

  1. Manually Provisioned API Tokens
    • Can be created by an Admin or a user with the API Token Creator role
    • Used for secure document indexing operations

Important

Client tokens will not work for Indexing operations, and Indexing tokens will not work for Client operations. You must use the appropriate token type for the namespace you're accessing.

For more information on obtaining the appropriate token type, please contact your Glean administrator.

Available Resources and Operations

Available methods

Agents

Chat

  • create - Create a chat response

Client.Activity

Client.Agents

Client.Announcements

Client.Answers

Client.Authentication

Client.Chat

Client.Collections

Client.Datasources

Client.Documents

Client.Entities

Client.Governance.Data.Findings

  • create - Creates findings export
  • list - Lists findings exports
  • download - Downloads findings export
  • delete - Deletes findings export

Client.Governance.Data.Policies

  • retrieve - Gets specified policy
  • update - Updates an existing policy
  • list - Lists policies
  • create - Creates new policy
  • download - Downloads violations CSV for policy

Client.Governance.Data.Reports

  • create - Creates new one-time report
  • download - Downloads violations CSV for report
  • status - Fetches report run status

Client.Governance.Documents.Visibilityoverrides

  • list - Fetches documents visibility
  • create - Hide or unhide docs

Client.Insights

Client.Messages

Client.Pins

Client.Search

Client.Shortcuts

Client.Tools

Client.Verification

Indexing.Authentication

Indexing.CustomMetadata

Indexing.Datasource

  • status - Beta: Get datasource status

Indexing.Datasources

Indexing.Documents

  • addOrUpdate - Index document

  • index - Index documents

  • bulkIndex - Bulk index documents

  • processAll - Schedules the processing of uploaded documents

  • delete - Delete document

  • debug - Beta: Get document information

  • debugMany - Beta: Get information of a batch of documents

  • checkAccess - Check document access

  • status - Get document upload and indexing status ⚠️ Deprecated

  • count - Get document count ⚠️ Deprecated

  • debugEvents - Beta: Get document lifecycle events

Indexing.People

Indexing.Permissions

Indexing.Shortcuts

Search

Skills

Triggers

Standalone functions

All the methods listed above are available as standalone functions. These functions are ideal for use in applications running in the browser, serverless runtimes or other environments where application bundle size is a primary concern. When using a bundler to build your application, all unused functionality will be either excluded from the final bundle or tree-shaken away.

To read more about standalone functions, check FUNCTIONS.md.

Available standalone functions

React hooks with TanStack Query

React hooks built on TanStack Query are included in this SDK. These hooks and the utility functions provided alongside them can be used to build rich applications that pull data from the API using one of the most popular asynchronous state management library.

To learn about this feature and how to get started, check REACT_QUERY.md.

Warning

This feature is currently in preview and is subject to breaking changes within the current major version of the SDK as we gather user feedback on it.

Available React hooks

File uploads

Certain SDK methods accept files as part of a multi-part request. It is possible and typically recommended to upload files as a stream rather than reading the entire contents into memory. This avoids excessive memory consumption and potentially crashing with out-of-memory errors when working with very large files. The following example demonstrates how to attach a file stream to a request.

Tip

Depending on your JavaScript runtime, there are convenient utilities that return a handle to a file without reading the entire contents into memory:

  • Node.js v20+: Since v20, Node.js comes with a native openAsBlob function in node:fs.
  • Bun: The native Bun.file function produces a file handle that can be used for streaming file uploads.
  • Browsers: All supported browsers return an instance to a File when reading the value from an <input type="file"> element.
  • Node.js v18: A file stream can be created using the fileFrom helper from fetch-blob/from.js.
import { Glean } from "@gleanwork/api-client";
import { openAsBlob } from "node:fs";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.skills.create({
    file: await openAsBlob("example.file"),
  });

  console.log(result);
}

run();

Retries

Some of the endpoints in this SDK support retries. If you use the SDK without any configuration, it will fall back to the default retry strategy provided by the API. However, the default retry strategy can be overridden on a per-operation basis, or across the entire SDK.

To change the default retry strategy for a single API call, simply provide a retryConfig object to the call:

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.agents.search({
    name: "HR Policy Agent",
  }, {
    retries: {
      strategy: "backoff",
      backoff: {
        initialInterval: 1,
        maxInterval: 50,
        exponent: 1.1,
        maxElapsedTime: 100,
      },
      retryConnectionErrors: false,
    },
  });

  console.log(result);
}

run();

If you'd like to override the default retry strategy for all operations that support retries, you can provide a retryConfig at SDK initialization:

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  retryConfig: {
    strategy: "backoff",
    backoff: {
      initialInterval: 1,
      maxInterval: 50,
      exponent: 1.1,
      maxElapsedTime: 100,
    },
    retryConnectionErrors: false,
  },
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.agents.search({
    name: "HR Policy Agent",
  });

  console.log(result);
}

run();

Error Handling

The following errors may be thrown by the SDK:

Status Code Description Error Type Content Type
400 Invalid Request errors.GleanError */*
401 Not Authorized errors.GleanError */*
403 Permission Denied errors.GleanDataError application/json
408 Request Timeout errors.GleanError */*
422 Invalid Query errors.GleanDataError application/json
429 Too Many Requests errors.GleanError */*
4XX Other Client Errors errors.GleanError */*
5XX Internal Server Errors errors.GleanError */*

Example

import { Glean } from "@gleanwork/api-client";****
import { GleanDataError, GleanError } from "glean/models/errors";

const glean = new Glean({
  apiToken: process.env["GLEAN_BEARER_AUTH"] ?? "",
});

try {
  const data = await glean.client.search.execute({
    query: "What are the company holidays this year?",
  });
  console.log(data);
} catch (error) {
  if (error instanceof GleanError) {
    console.error(error.message);
    console.error(error.statusCode);
    console.error(error.rawResponse);
    console.error(error.body);
  }

  // If the server returned structured data
  if (error instanceof GleanDataError) {
    console.error(error.errorMessages);
    console.error(error.invalidOperators);
  }

  throw error;
}

Advanced Error Handling

Validation errors can also occur when either method arguments or data returned from the server do not match the expected format. The SDKValidationError that is thrown as a result will capture the raw value that failed validation in an attribute called rawValue. Additionally, a pretty() method is available on this error that can be used to log a nicely formatted multi-line string since validation errors can list many issues and the plain error string may be difficult read when debugging.

In some rare cases, the SDK can fail to get a response from the server or even make the request due to unexpected circumstances such as network conditions. These types of errors are captured in the models/errors/httpclienterrors.ts module:

HTTP Client Error Description
RequestAbortedError HTTP request was aborted by the client
RequestTimeoutError HTTP request timed out due to an AbortSignal signal
ConnectionError HTTP client was unable to make a request to a server
InvalidRequestError Any input used to create a request is invalid
UnexpectedClientError Unrecognised or unexpected error

Server Selection

Server Variables

The default server https://{instance}-be.glean.com contains variables and is set to https://instance-name-be.glean.com by default. To override default values, the following parameters are available when initializing the SDK client instance:

Variable Parameter Default Description
instance instance: string "instance-name" The instance name (typically the email domain without the TLD) that determines the deployment backend.

Example

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  serverIdx: 0,
  instance: "instance-name",
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.agents.search({
    name: "HR Policy Agent",
  });

  console.log(result);
}

run();

Override Server URL Per-Client

The default server can be overridden globally by passing a URL to the serverURL: string optional parameter when initializing the SDK client instance. For example:

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  serverURL: "https://instance-name-be.glean.com",
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.agents.search({
    name: "HR Policy Agent",
  });

  console.log(result);
}

run();

Override Server URL Per-Operation

The server URL can also be overridden on a per-operation basis, provided a server list was specified for the operation. For example:

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
});

async function run() {
  const result = await glean.indexing.datasources.submit(
    {
      "key": "<value>",
      "key1": "<value>",
      "key2": "<value>",
    },
    "<value>",
    "<value>",
    {
      serverURL: "https://instance-name-be.glean.com",
    },
  );

  console.log(result);
}

run();

Custom HTTP Client

The TypeScript SDK makes API calls using an HTTPClient that wraps the native Fetch API. This client is a thin wrapper around fetch and provides the ability to attach hooks around the request lifecycle that can be used to modify the request or handle errors and response.

The HTTPClient constructor takes an optional fetcher argument that can be used to integrate a third-party HTTP client or when writing tests to mock out the HTTP client and feed in fixtures.

The following example shows how to:

  • route requests through a proxy server using undici's ProxyAgent
  • use the "beforeRequest" hook to add a custom header and a timeout to requests
  • use the "requestError" hook to log errors
import { Glean } from "@gleanwork/api-client";
import { ProxyAgent } from "undici";
import { HTTPClient } from "@gleanwork/api-client/lib/http";

const dispatcher = new ProxyAgent("http://proxy.example.com:8080");

const httpClient = new HTTPClient({
  // 'fetcher' takes a function that has the same signature as native 'fetch'.
  fetcher: (input, init) =>
    // 'dispatcher' is specific to undici and not part of the standard Fetch API.
    fetch(input, { ...init, dispatcher } as RequestInit),
});

httpClient.addHook("beforeRequest", (request) => {
  const nextRequest = new Request(request, {
    signal: request.signal || AbortSignal.timeout(5000)
  });

  nextRequest.headers.set("x-custom-header", "custom value");

  return nextRequest;
});

httpClient.addHook("requestError", (error, request) => {
  console.group("Request Error");
  console.log("Reason:", `${error}`);
  console.log("Endpoint:", `${request.method} ${request.url}`);
  console.groupEnd();
});

const sdk = new Glean({ httpClient: httpClient });

Debugging

You can setup your SDK to emit debug logs for SDK requests and responses.

You can pass a logger that matches console's interface as an SDK option.

Warning

Beware that debug logging will reveal secrets, like API tokens in headers, in log messages printed to a console or files. It's recommended to use this feature only during local development and not in production.

import { Glean } from "@gleanwork/api-client";

const sdk = new Glean({ debugLogger: console });

You can also enable a default debug logger by setting an environment variable GLEAN_DEBUG to true.

Experimental Features and Deprecation Testing

The SDK provides options to test upcoming API changes before they become the default behavior. This is useful for:

  • Testing experimental features before they are generally available
  • Preparing for deprecations by excluding deprecated endpoints ahead of their removal

Configuration Options

You can configure these options either via environment variables or SDK constructor options:

Using Environment Variables

// Set environment variables before initializing the SDK
process.env.X_GLEAN_EXCLUDE_DEPRECATED_AFTER = '2026-10-15';
process.env.X_GLEAN_INCLUDE_EXPERIMENTAL = 'true';

import { Glean } from "@gleanwork/api-client";

const glean = new Glean({
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
  serverURL: "https://mycompany-be.glean.com",
});

Using SDK Constructor Options

import { Glean } from "@gleanwork/api-client";
import type { SDKOptions } from "@gleanwork/api-client";
import type { XGleanOptions } from "@gleanwork/api-client/hooks/x-glean-options.js";

const opts = {
  apiToken: process.env["GLEAN_API_TOKEN"] ?? "",
  serverURL: "https://mycompany-be.glean.com",
  excludeDeprecatedAfter: "2026-10-15",
  includeExperimental: true,
} satisfies SDKOptions & XGleanOptions;

const glean = new Glean(opts);

Option Reference

Option Environment Variable Type Description
excludeDeprecatedAfter X_GLEAN_EXCLUDE_DEPRECATED_AFTER string (date) Exclude API endpoints that will be deprecated after this date (format: YYYY-MM-DD). Use this to test your integration against upcoming deprecations.
includeExperimental X_GLEAN_INCLUDE_EXPERIMENTAL boolean When true, enables experimental API features that are not yet generally available. Use this to preview and test new functionality.

Note

Environment variables take precedence over SDK constructor options when both are set.

Warning

Experimental features may change or be removed without notice. Do not rely on experimental features in production environments.

Development

Maturity

This SDK is in beta, and there may be breaking changes between versions without a major version update. Therefore, we recommend pinning usage to a specific package version. This way, you can install the same version each time without breaking changes unless you are intentionally looking for the latest version.

Contributions

While we value open-source contributions to this SDK, this library is generated programmatically. Any manual changes added to internal files will be overwritten on the next generation. We look forward to hearing your feedback. Feel free to open a PR or an issue with a proof of concept and we'll do our best to include it in a future release.

SDK Created by Speakeasy

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TypeScript API client for the Glean API

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