Best API tools
A curated list of tools tagged API — free to browse, no sign-up required.
CPFHub.io
Brazilian CPF lookup API with an MCP server for AI agents
Agent Service Market
Bounded operation contracts and pilot documentation for AI agent developers
VerdictKit
Explore typed AI decisions with the Jev playground
Login Broker
Social login in five minutes. One key, six providers.
appkeepr
Your app alerts in one inbox, on web and phone
StatOrigin
Free, sourced industry statistics with publisher, report and quote for every number
LinoRoute
One gateway for multi-model AI API access
superagnt_
One MCP endpoint for any agent: data, scraping, Postgres, memory, queues, and inbox.
Menlo Insurance MCP
Request California and Texas insurance quotes through customer MCP tools
Orisift
One API to check phones, email domains, IPs and domains
TwitterXAPI
Public X data for apps, AI agents, and bulk exports
SpeechGen
Create voiceovers for videos and lessons with multilingual voices and one-time credits
热核算力
GPT API access with clear model groups and usage billing
Gateway Information Group — Agent Services
Website checks and digital products with wallet checkout and private delivery.
XGR MCP Gateway
AI-native MCP access to XGRChain and XDaLa workflows
Intelligence HQ
AI-powered multi-sport predictions with Red Team review.
ParlayAPI
Sports odds API with Python and MCP clients
Lightdrift
Stock-image search API and MCP for agent-built content
DialPhone
AI-powered business phone system
Varion
Measured token optimization and AI developer tools
Revdoku
Email inboxes and secure cloud buckets for AI agents
SEO Morphy
Template-based SEO titles and descriptions for Russian product catalogs
AICost Team
Independent LLM API price desk — compare model pricing across OpenAI, Anthropic, Google and more. Calculators, head-to-heads, no paid placements.
Resolve by 2BLD
Validated invoice and receipt documents to structured JSON API
SafePage Generator
Generate campaign-ready landing pages and prelanders for new offers, GEOs and tests.
MailVeri
Email verification API that checks deliverability before you send
TrueProxies
Residential proxies you can actually trust.
doloc
Software localization automated in your existing workflow
SchemaExtract
PDF/image to typed JSON against YOUR schema — free playground, no signup
Aria Icons
340,000+ SVG icons with web, CLI, API, and remote MCP access
Oyster
AI skin analysis and product matching for beauty businesses
Nexscope
Ecommerce intelligence and AI video creation in one workspace
Rapid Indexer
Get your pages found on Google, fast.
402cron
Scheduled, signed HTTP delivery for AI agents
만화 번역기 — manga translator
AI 만화 번역기는 만화 이미지의 텍스트를 여러 언어로 번역합니다.
PermitCore
Software licensing infrastructure built by developers for developers
SMSVAR
Global SMS verification numbers and API for developers
Commonlog
A permanent shared log where AI agents can post, link, and read back work.
SlickFast
Deterministic charts, no browser
GetXAPI
The cheapest Twitter and X API
IPCheckly
IP data and security intelligence
VirtuProbe Studio
A multi-protocol API testing workbench
Formcarry
A form backend for developers
Dozer
Real-time data APIs from any source
Oso
Authorization for your application
Rime
Realistic text-to-speech for products
Gladia
Speech-to-text and audio intelligence API
Ragie
Fully managed RAG-as-a-service
Inferless
Serverless GPU inference for models
WunderGraph
Turn your APIs into a unified graph
Yaak
A modern, offline API client
Liveblocks
Add real-time collaboration to your product
Browserbase
Headless browser infrastructure for AI
Firecrawl
Turn websites into LLM-ready data
Retell AI
Build conversational voice AI agents
Vapi
Build voice AI agents for phone calls
Fireworks AI
Fast inference for generative AI
Fal
The fastest inference for generative media
Beeceptor
Mock APIs and inspect webhooks
Cartesia
Real-time generative voice
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