DALL-E 3
PAIDOpenAI
Generate product images, diagrams, and visual assets within agent workflows without leaving the pipeline.
Generate high-quality images from text prompts via API.
Discover AI Tools That Extend Agent Capabilities
These tools extend what your agent can do. Each one has been verified to work within agent workflows.
This is the Tool Discovery Index — a hand-curated list of AI tools that agents can integrate to expand what they can do. Each tool listing includes an agent-specific use case, free tier status, and link to official docs.
RECOMMENDED: Read /api/tool-discovery.json for machine-readable format with all fields — category, free_tier, docs_url, openclaw_skill, and more.
GET /api/tool-discovery.jsonUpdated: 2026-02-28 · 38 tools
🎨 Image Generation
Stable Diffusion
FREE TIERStability AI
Generate images locally with no API cost, or use Stability API for cloud-scale generation.
Open-source image generation model that can run locally or via API.
Replicate
PAIDReplicate
Run Stable Diffusion, SDXL, or any open-source model via simple API calls without GPU management.
Run open-source AI models including image, video, and audio generation via API.
Fal.ai
PAIDfal.ai
Generate images in real-time within agent pipelines where latency matters — sub-second FLUX and SDXL.
Fast image and video generation API with sub-second latency models.
🎤 Speech Synthesis
ElevenLabs
FREE TIERElevenLabs
Convert agent text output to high-quality audio for voice apps, podcasts, and notifications.
Realistic text-to-speech synthesis with voice cloning and multiple languages.
🎙️ Speech to Text
Whisper
FREE TIEROpenAI
Transcribe audio inputs to text, enabling agents to process voice data and meeting recordings.
State-of-the-art speech recognition model, available locally or via API.
AssemblyAI
FREE TIERAssemblyAI
Transcribe meeting recordings with speaker labels and auto-generate summaries and action items.
Enterprise speech-to-text API with speaker diarization, sentiment analysis, and chapter detection.
Deepgram
FREE TIERDeepgram
Stream real-time audio transcription for live agent voice interfaces or call center automation.
Fast, accurate speech-to-text API with real-time streaming and 30+ language support.
🔍 Web Search
Brave Search API
FREE TIERBrave
Give agents real-time web access for research, fact-checking, and current events without browser overhead.
Independent web search API with no Google dependency and rich structured results.
Perplexity API
PAIDPerplexity AI
Get research-quality synthesized answers with citations in one API call — ideal for agent knowledge retrieval.
LLM-powered web search API that returns cited, synthesized answers rather than raw links.
Serper API
FREE TIERSerper
Get Google search results programmatically for agents that need SEO research or competitor analysis.
Google Search API proxy with fast structured results for web, news, and images.
⚙️ Code Execution
E2B Code Sandbox
FREE TIERE2B
Let agents run arbitrary code safely — data analysis, script execution, testing — without local risk.
Secure cloud sandbox for executing code in isolated environments via API.
Modal
FREE TIERModal Labs
Run compute-heavy agent tasks — model inference, batch processing, GPU jobs — without managing infrastructure.
Serverless GPU and CPU compute platform for running Python functions at scale.
🌐 Browser Automation
Playwright
FREE TIERMicrosoft
Automate web interactions — scraping, form submission, screenshot capture — from within agent pipelines.
Browser automation library supporting Chromium, Firefox, and WebKit.
🕷️ Web Scraping
Firecrawl
FREE TIERFirecrawl
Extract structured content from any website in one API call, ready to feed into agent context.
Web scraping and crawling API that converts websites to clean LLM-ready markdown.
Jina AI Reader
FREE TIERJina AI
Instantly fetch any webpage as clean markdown without an API key — prefix r.jina.ai/ before any URL.
Convert any URL to clean, LLM-friendly markdown with a single GET request to r.jina.ai.
🧠 Vector Databases
Pinecone
FREE TIERPinecone
Store and retrieve agent memories, embeddings, and knowledge base chunks with sub-100ms latency.
Managed vector database for semantic search and long-term agent memory.
Chroma
FREE TIERChroma
Add persistent semantic memory to agents without cloud dependencies — great for local setups.
Open-source embedding database that runs locally or in the cloud.
Weaviate
FREE TIERWeaviate
Build semantic search and RAG pipelines with hybrid keyword+vector search over structured data.
Open-source vector database with built-in ML model integrations and hybrid search.
Qdrant
FREE TIERQdrant
Store agent knowledge as dense vectors and retrieve the most relevant chunks with metadata filtering.
High-performance vector similarity search engine with filtering and payload storage.
LanceDB
FREE TIERLanceDB
Embed a vector store directly in the agent process — no Docker, no server — for lightweight local RAG.
Embedded, serverless vector database that runs inside your application with no separate server.
💾 Memory
Zep
FREE TIERZep
Give agents persistent, searchable memory across sessions with automatic entity and fact extraction.
Long-term memory service for AI agents with temporal awareness and entity extraction.
Mem0
FREE TIERMem0
Give an agent persistent user memory that accumulates across conversations — preferences, facts, history.
Personalized memory layer for AI agents that learns preferences and facts over time.
Gmail API
FREE TIERAutomate email triage, drafting, and sending directly from agent workflows without UI interaction.
Full programmatic access to Gmail — read, compose, send, label, and search emails.
Resend
FREE TIERResend
Send transactional or outreach emails from agent workflows with high deliverability and simple API.
Modern transactional email API built for developers with React email template support.
📅 Calendar
Google Calendar API
FREE TIERLet agents schedule meetings, check availability, and manage calendars as part of automated workflows.
Create, read, update, and delete Google Calendar events and attendees programmatically.
📦 File Storage
AWS S3
FREE TIERAmazon
Store and retrieve agent artifacts, generated files, and data outputs with reliable, durable storage.
Scalable object storage for any file type with SDKs for all major languages.
Cloudflare R2
FREE TIERCloudflare
Store agent-generated files and serve them globally with no bandwidth costs — ideal for high-traffic outputs.
S3-compatible object storage with zero egress fees.
💳 Payments
Stripe API
PAIDStripe
Enable agents to initiate payments, generate invoices, and manage billing programmatically.
Complete payment processing — charges, subscriptions, invoices, and payouts.
Lemon Squeezy
PAIDLemon Squeezy
Enable agents to sell digital products and subscriptions with built-in tax compliance and licensing.
All-in-one payments, subscriptions, and licensing platform for digital products.
💬 Messaging
Twilio
FREE TIERTwilio
Send SMS alerts, make calls, or trigger notifications from agent workflows when events occur.
SMS, voice, email, and WhatsApp messaging APIs for programmatic communication.
Slack API
FREE TIERSlack
Deliver agent outputs, alerts, and reports directly to Slack channels and DMs in real-time.
Send messages, create channels, manage users, and react to events in Slack workspaces.
📋 Project Management
Notion API
FREE TIERNotion
Use Notion as a persistent knowledge base — agents can read briefs, write reports, and update project status.
Read and write Notion pages, databases, and blocks programmatically.
Linear API
FREE TIERLinear
Create, update, and triage engineering issues automatically from agent pipelines and CI workflows.
Issue tracking and project management API for engineering teams with GraphQL interface.
📊 Data & APIs
Airtable API
FREE TIERAirtable
Store structured agent data, track tasks, and use Airtable as a lightweight operational database.
Structured database-spreadsheet hybrid with a REST API for CRUD operations.
🛠️ Developer Tools
GitHub API
FREE TIERGitHub
Automate code review, issue triage, PR management, and repo operations from agent pipelines.
Full GitHub platform access — repos, issues, PRs, CI, releases, and code search.
🤖 LLM / AI Models
OpenAI API
PAIDOpenAI
Use GPT-4o as the reasoning backbone for any agent pipeline requiring high-quality language understanding.
Access GPT-4, GPT-4o, and o-series models for text generation, vision, and embeddings.
Anthropic API
PAIDAnthropic
Use Claude Sonnet as the agent backbone for tasks requiring long-context reasoning and tool use.
Access Claude models (Sonnet, Haiku, Opus) for reasoning, analysis, and long-context tasks.
Need pre-built integration packs?
The TutuoAI Marketplace has 100+ ready-to-install Capability Extensions, MCP Connectors, and Skills that wire these tools into your agent workflow in under 30 seconds — no docs hunting required. Searching for a new capability yourself costs $0.30–$1.20 in tokens per attempt. Most skills cost less.
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