📖 The AI Tool Bible

AI tools for API

48 tools available on API.

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Flux

Featured
Image Generation · Flux.1 [schnell / dev / pro]
9.0

Black Forest Labs' open-weights image model — rivals Midjourney quality.

Freemium· API per-image; weights free for [schnell] and [dev]open sourceself-hosted

Braintrust

Featured
Evaluation · Platform (any LLM)
8.9

Eval, monitor, and improve AI products end-to-end.

Freemium· Free up to 1k events/day; team from $249/moevalsmonitoring

Pinecone

Featured
RAG · Hosted vector DB (not an LLM)
8.8

Managed vector database for production-scale similarity search.

Freemium· Free starter; serverless pay-as-you-go from $0.33/1M readsmanaged vector DBproduction RAG

LlamaIndex

Featured
RAG · BYO (Claude / GPT / open)
8.7

Data framework for connecting LLMs to your data.

Freemium· Free open-source; LlamaCloud paidRAGdata ingestion

Together AI

Featured
Fine-tuning · Llama / Mistral / Qwen / DeepSeek and others
8.6

Fine-tune & serve open-weight models (Llama, Mistral, DeepSeek).

Paid· Pay-per-token; fine-tuning per-tokenopen modelsfine-tuning

LangSmith

Evaluation · Platform (any LLM)
8.7

LangChain's eval + observability platform.

Freemium· Free starter; Plus $39/mo per seatLLM tracingevals

Replicate

Fine-tuning · Thousands of community + first-party models
8.5

One-API platform for running and fine-tuning open-source models.

Paid· Pay-per-second of GPU timemodel hostingfine-tuning

OpenAI Fine-tuning

Fine-tuning · GPT-4o-mini / GPT-3.5
8.4

Fine-tune GPT-4o-mini and friends on your own data.

Paid· Training $25/1M tokens; inference at standard ratesstyleformat

Weaviate

RAG · Hosted vector DB (not an LLM)
8.4

Open-source vector DB with hybrid search and modules.

Freemium· Free open-source; cloud from $25/moself-hosted RAGhybrid search

Weights & Biases

Evaluation · Platform (any LLM)
8.4

The ML experiment tracker, now with LLM eval features.

Freemium· Free personal; team from $50/mo per seatML experimentsLLM eval

Helicone

Evaluation · Platform (any LLM)
8.3

Open-source LLM observability — one-line proxy install.

Freemium· Free 100k req/mo; Pro from $25/moobservabilitycost tracking

LangChain

RAG · BYO (any major LLM)
8.3

The broad LLM application framework — chains, agents, retrievers.

Freemium· Free open-source; LangSmith paidgeneral LLM appsRAG

Humanloop

Evaluation · Platform (any LLM)
8.2

Prompt management + evals for collaborative AI teams.

Paid· From $200/mo teamprompt managementteam collab

Vespa

RAG · Hosted search engine (not an LLM)
8.2

Yahoo's open-source search engine with vector + sparse retrieval.

Freemium· Free open-source; Vespa Cloud paidlarge-scale searchranking

Anyscale

Fine-tuning · Infrastructure (any model)
7.9

Ray-powered platform for training, serving, and scaling LLMs.

Paid· Enterprise / contact salesdistributed trainingRay

PromptLayer

Evaluation · Platform (any LLM)
7.9

Lightweight prompt logging + management for OpenAI/Claude apps.

Freemium· Free; Pro from $50/moprompt loggingversioning

Patronus

Evaluation · Platform (any LLM)
7.8

Automated LLM evaluation for hallucinations, safety, and quality.

Paid· Enterprise / contact saleshallucination detectionsafety

Lamini

Fine-tuning · Lamini (built on open base models)
7.7

Memory-tuning platform for grounding LLMs in your facts.

Paid· Enterprise / contact salesenterprise FTfactual recall

A2A Protocol

Agents

Open standard for letting AI agents from different frameworks talk to each other.

Free· Free and open source (Apache 2.0)multi-agent-systemsagent-interop

AI Boost

Image Generation · Multi-model

Mobile-first AI photo and video editor with face swap, avatars, and text-to-art generation.

Freemium· Free download with in-app purchase subscriptionface-swapai-avatars

AI Dungeon

Writing · Multi-model (rotating open-weights: Mixtral, Llama, Hermes variants)

AI-powered text adventure platform where the story is generated turn-by-turn by an LLM.

Freemium· Free tier; paid tiers roughly $10-$30/mo (Adventurer / Champion / Mythic)interactive-fictionai-roleplay

AI Horde (Stable Horde)

Image Generation · Stable Diffusion (SD 1.5, SDXL, community checkpoints) + open LLMs

Crowdsourced, volunteer-run cluster for free Stable Diffusion image and LLM text generation.

Free· Free; optional Kudos earned by donating GPU time or purchased via Patreontext-to-imageimg2img

AI Photo Forge

Image Generation · Fine-tuned diffusion (likeness LoRA)

Telegram-native AI headshot generator that turns selfies into professional portraits inside a chat thread.

Paid· Credit/pack-based (per headshot batch)ai-headshotslinkedin-portraits

AI SDK

Coding · Multi-model

Vercel's open-source TypeScript framework for building AI apps across 16+ providers with unified streaming, tools, and UI hooks.

Free· Open source (Apache 2.0); pay only for the underlying model APIschat-uiagent-building

AI Watermark Remover

Image Generation

Free browser-based watermark eraser that inpaints brushed-over regions in photos.

Free· Free, no signup requiredwatermark-removalobject-removal

AI-Flow

Agents · Multi-model (OpenAI, Anthropic, Google, Replicate, xAI)

Visual node-based builder for chaining OpenAI, Anthropic, Replicate and other model APIs into content pipelines.

Freemium· Free tier: 25 welcome credits + 20 BYOK runs/day; paid plans for extended storageworkflow-automationcontent-pipelines

AI/ML API

Coding · Multi-model (GPT, Claude, Gemini, Grok, Nemotron, Qwen, etc.)

Unified API gateway exposing 500+ AI models behind one OpenAI-compatible endpoint.

Freemium· Pay-as-you-go from $20 prepaid credit; enterprise custommulti-model-routingprototyping

AI2sql

Coding

Natural-language-to-SQL generator with desktop app, MCP server, and governed read-only access.

Freemium· Free tier (100 queries); Start $5/mo, Pro $11/mo, Team $23/mo; 7-day trialtext-to-sqlquery-optimization

AICaller

Agents

Automated outbound phone-calling platform using hyper-realistic AI voices for lead qualification, scheduling, and surveys.

Paid· Build $49/mo (300 credits); Grow $499/mo (4,000 credits); Enterprise usage-based at $0.12/creditoutbound-callinglead-qualification

AIVA

Audio · Proprietary (AIVA)

AI music composition tool that generates royalty-friendly tracks in 250+ styles with editable MIDI output.

Freemium· Free; Standard ~€11/mo, Pro ~€33/mo (billed yearly)music-generationsoundtrack-composition

Adzooma

Agents

PPC management dashboard with AI-assisted audits and ad-copy optimization across Google, Microsoft, and Meta.

Freemium· Free forever plan; paid tiers not publicly listedppc-managementad-copy-optimization

Affogato

Image Generation · Multi-model (Nano Banana Pro, Veo, Kling, FLUX, Sora)

Multi-model image and video generation studio bundling 170+ third-party models behind one credit-based workspace.

Paid· Standard $24/mo, Ultra $69/mo, Pro Max $251/mo, Team from $99/motext-to-imagetext-to-video

Agent Lightning

Agents · Multi-model

Microsoft's open-source trainer that fine-tunes AI agents with RL and prompt optimization, framework-agnostic.

Free· Free, MIT-licensed open sourceagent-trainingreinforcement-learning

AgentDock

Agents

Omnichannel AI customer service platform with memory, intelligent handoff, and explainable decisions.

Paid· Early-access waitlist; pricing not disclosedcustomer-supportomnichannel-chat

AgentMail

Agents

API-first email provider purpose-built for autonomous AI agents.

Freemium· Free (3 inboxes); Developer $20/mo; Startup $200/mo; Enterprise customagent-emailinbox-provisioning

AgentMemory

Agents · Multi-model (Claude, Gemini, MiniMax, OpenRouter)

Open-source persistent memory runtime for AI coding agents, with hybrid retrieval and zero external dependencies.

Free· Free, open-source (Apache 2.0); bring your own LLM API keyagent-memorycoding-agents

Agenta

Evaluation · Multi-model

Open-source LLMOps platform for prompt engineering, evaluation, and observability in one workspace.

Freemium· Open-source self-host free; managed cloud has free tier plus paid plansprompt-engineeringllm-evaluation

Agentset

RAG · Multi-model (Claude, OpenAI, Google, xAI, Cohere, Mistral, DeepSeek)

Production-ready RAG infrastructure with agentic search, citations, and model-agnostic plumbing.

Freemium· Free 1K pages/10K retrievals; Pro $49/mo + $0.01/page; Enterprise customdocument-qaagentic-search

Aidbase

Agents · OpenAI

AI-powered customer support stack purpose-built for SaaS startups, bundling a trained chatbot, ticketing, and knowledge base.

Freemium· 7-day free trial, no credit card; paid plans thereaftercustomer-supportai-chatbot

Aispect

Image Generation

Turns live audio at events into AI-generated visuals on the fly, in 30+ languages.

Freemium· 5 free credits; PAYG $12.50/30 credits; Basic $34.90/mo (100 credits); Pro $149.90/mo (500 credits)live-event-visualsspeech-to-image

AlpacaEval

Evaluation · GPT-4 Preview (Nov 2024) as annotator

Automatic LLM evaluator and leaderboard that benchmarks instruction-following with length-controlled win rates.

Free· Free and open-source; pay only for the underlying OpenAI annotator API callsllm-benchmarkinginstruction-following eval

Amazon Q

Coding · Multi-model (Amazon Bedrock)

AWS's enterprise AI assistant for developers, analysts, and knowledge workers, wired into your company data.

Freemium· Free tier; Q Developer Pro $19/user/mo; Q Business Lite $3, Pro $20/user/mocode-generationenterprise-search

Amazon Q Developer

Coding · Multi-model (Amazon proprietary + partners)

AWS's in-IDE coding assistant and agent, formerly CodeWhisperer, tuned for cloud-heavy workflows.

Freemium· Free tier; Pro $19/user/monthcode-completionagentic-coding

Amazon SageMaker

Agents · Multi-model

AWS's end-to-end platform for building, training, and deploying machine learning models and AI agents at enterprise scale.

Paid· Pay-as-you-go; free tier available for new AWS accountsmodel-trainingmodel-deployment

AnkiDecks AI

Writing

AI flashcard generator that turns PDFs, slides, YouTube videos and handwritten notes into Anki-ready decks.

Freemium· Free plan: 4 decks/month; Pro plan for larger files and unlimited decks (price on pricing page)flashcard-generationspaced-repetition

AnythingLLM

RAG · Multi-model

Open-source desktop and self-hosted app that turns your documents into a private chat-and-agent workspace.

Freemium· Desktop free (MIT); self-host free; cloud paid plansdocument-chatprivate-rag

Anyword

Writing · Multi-model

AI marketing copy platform that scores and predicts content performance before you publish.

Paid· Starter $49/mo; Data-Driven $99/mo; Business & Enterprise custom; 7-day free trial (2,500 words)ad-copyemail-marketing

Apache Mahout

Coding

Open-source ML framework pivoting toward scalable quantum computing primitives.

Free· Free, Apache-2.0 licensedquantum-circuitshybrid-ml