Discover Agent-Ready Tools

The Tool Directory
Your Agent Can Use

Discover 191+ tools your agent can find, evaluate, and call. Add your tool and reach thousands of developers instantly.

191+ tools already listed

Curated by Michael Yu · Last reviewed

Browse by Category

Explore tools organized by what they do

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Browse the complete catalog of agent-ready tools

191 tools

21st logo

21stCLI

Deployment · Hosting

Hosted infrastructure for deploying persistent AI agents

Freetypescript, python
Activeloop logo

ActiveloopCLI

Vector DB · Database · Data

Deep Lake database for multimodal AI and agent memory

Freepython
AgentCash logo

AgentCashMCPCLI

Payment · Data

A wallet and paid API marketplace built for AI agents

Pay per API call
AgentHaus logo

AgentHaus

Deployment · Observability

Visual agent builder that exports production-ready TypeScript

Private launchtypescript
Agentic Fabriq logo

Agentic FabriqMCPCLI

Auth · Identity

Identity and permissioning for AI agents through a governed MCP gateway

Freepython
AgentMail logo

AgentMailMCP

Email · Communication

Email inbox API for AI agents — give your agent its own email address

Freetypescript, python
AgentOps logo

AgentOpsMCP

Observability · Monitoring

Session replay, monitoring, and evaluation for AI agents

Freetypescript, python
AgentQL logo

AgentQL

Browser · Web Scraping · Data

Semantic web interaction and data extraction for AI agents

Freetypescript, python
Agentuity logo

AgentuityMCPCLI

Deployment · Hosting · Sandbox · Observability

Full-stack cloud platform built for AI agents

Freetypescript
Airbyte logo

AirbyteMCPCLI

Data · Database

Data and context layer for production AI agents

Freepython
Airweave logo

AirweaveMCPCLI

Search · Data · Memory

Open-source context retrieval for AI agents

Freetypescript, python
Algolia logo

AlgoliaMCPCLI

Search · Data

AI-powered search and discovery API for developers

Freejavascript, python, php, ruby, go, java, kotlin, swift
Apify logo

ApifyMCPCLI

Browser · Web Scraping

Cloud platform for web scraping, crawlers, and automation Actors

Freetypescript, python
Arcade logo

ArcadeMCP

Auth · Data

MCP runtime for secure, production AI agent tool use

Freetypescript, python
Arga Labs logo

Arga LabsMCPCLI

Sandbox · Code Execution · Observability

Stateful service twins for testing and training AI agents

Free
Arize Phoenix logo

Arize PhoenixMCPCLI

Observability · Monitoring

Open-source tracing and evaluation for LLM applications

Freetypescript, python
PostBridge logo

PostBridge

Data

Host WordPress in Shopify subfolders and export Notion docs to your CMS

$29/month
AssemblyAI logo

AssemblyAI

Audio · Data

Speech AI APIs for transcription, understanding, and voice agents

Freetypescript, python, go, java, csharp, ruby
Auth0 logo

Auth0MCPCLI

Auth · Identity

Identity and delegated authorization for AI agents

Freejavascript, python, go, java
AutoSend logo

AutoSendMCP

Email · Communication

Email platform for developers and AI agents — transactional and marketing

Freetypescript, python
Axiom logo

AxiomCLI

Observability · Monitoring · Data

Cloud-native logs, traces, and event data for agent systems

Freetypescript, python, go
Baserun logo

Baserun

Observability · Monitoring

Observability, testing, and evaluations for LLM applications

Freetypescript, python
BentoLabs AI logo

BentoLabs AI

Monitoring · Observability

Monitoring and learning for long-running AI agents

Freetypescript, python
Better Auth logo

Better AuthMCPCLI

Auth · Identity

The most comprehensive authentication framework for TypeScript

Freetypescript
Bland AI logo

Bland AIMCPCLI

Audio · Communication

Enterprise API platform for automated AI phone calls

Freetypescript, python
Blaxel logo

BlaxelMCPCLI

Sandbox · Code Execution · Deployment

Perpetual sandbox platform — sandboxes that sleep but never die

Freetypescript, python
Boundary logo

BoundaryCLI

Code Execution · Data

BAML programming language for reliable structured AI outputs

Freetypescript, python, go, ruby
Braintrust logo

BraintrustMCPCLI

Observability · Monitoring · Data

Evaluation, tracing, and prompt management for AI products

Freetypescript, python
Brave Search logo

Brave SearchMCP

Search

Privacy-focused search API with web, news, image, and video endpoints

Freepython, javascript, go
Browserbase logo

BrowserbaseMCP

Browser · Web Scraping

Headless browser infrastructure built for AI agents

Freetypescript, python

Directory methodology

How 4agent keeps listings useful

We publish concise, structured facts so developers and agents can compare tools without guessing how each service integrates.

What is 4agent?

4agent is a curated directory of APIs, MCP servers, and developer services that AI agents can use to search, act, store data, communicate, and deploy software.

How does 4agent evaluate tools?

Each listing is reviewed for a working product website, a clear agent use case, and practical integration signals such as an API, MCP support, OpenAPI documentation, authentication, SDKs, and pricing.

Integration fields are checked against the official Model Context Protocol specification and OpenAPI Specification.

How often is the catalog updated?

The catalog is reviewed as new tools are submitted and existing listings change. Each public submission is held as a draft until it passes manual review.

Tool pages also expose machine-readable SoftwareApplication data for automated discovery.

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