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A self-hosted team messenger with channels, DMs, threads, voice/video calls and file sharing, deployed entirely on your own infrastructure with no third-party cloud. AI, moderation and translation are optional add-ons.
Self-hosted
What to know▼
How it works
A self-hosted team messenger — channels, DMs, threads, voice/video calls, file sharing — deployed entirely on your own infrastructure with no third-party cloud involved.
What's different
AI, moderation, translation and push notifications are optional add-ons you turn on only when needed, rather than bundled by default.
Best for
Teams that need a Slack-like messenger but require it to run entirely on their own infrastructure, not a vendor's cloud.
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Desktop API client built specifically for gRPC and Protobuf, replacing the manual grpcurl-in-terminal workflow backend engineers fall back to since REST-first tools bolt on gRPC support.
Watch out · macOS only.
What to know▼
How it works
You register your .proto files once and it automatically discovers every gRPC service and method, rendering a schema-aware request editor with enums as dropdowns.
What's different
Built specifically for gRPC and Protobuf rather than REST tools with gRPC bolted on.
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A free, open-source Chrome DevTools extension for testing APIs — capture, inspect, edit, and replay HTTP requests without an external proxy, plus a quick header and secrets audit.
FreeOpen source
What to know▼
How it works
A Chrome DevTools extension that captures, inspects, edits, and replays HTTP/HTTPS requests without an external proxy, plus a Quick Security Check that audits headers and flags secrets or PII.
What's different
Works without needing to route traffic through an external proxy, unlike typical API testing setups.
Pricing
Free and open-source.
Best for
Developers testing API security directly inside Chrome DevTools.
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Collection of random generators for passwords, names, numbers, and colors with an API, for developers and casual users, instead of building your own generator.
What to know▼
How it works
Generate passwords, names, numbers, colors, and more through a customizable interface or an API.
What's different
No registration required for instant access.
Best for
Developers who want a random-generation API, or casual users needing a quick result.
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A REST API that lets developers order lab tests and biomarkers for patients, handling labs, kits, couriers and EU health compliance (GDPR, ISO 15189) behind the scenes. Built for developers integrating diagnostics into health apps, not for clinicians directly.
What to know▼
How it works
A single REST API to order any of 2,500+ biomarkers per patient, from a routine blood panel to whole-genome sequencing, returning structured JSON results via a live sandbox.
What's different
Handles the labs, kits, couriers and EU compliance stack (RiliBÄK, ISO 15189, GDPR) behind the API, reducing integration to three calls: create a profile, book a draw, read the result.
Best for
Developers integrating lab diagnostics into health apps, not clinicians using it directly.
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Tool that captures incoming webhooks exactly as received and replays them byte-for-byte to your local machine with valid signatures, for developers testing integrations, instead of waiting for a provider to refire an event.
No sign-up
What to know▼
How it works
Captures headers, body, and signature, encrypts at rest, and replays single, batch, or ordered sequences with signature verification (Simple HMAC, Svix, Stripe, Square) still passing.
What's different
Ships an MCP server so Claude Code and Cursor can capture, inspect, and replay webhooks directly.
Best for
Developers who need to repeatedly test webhook-triggered code without waiting on the real provider.
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A Pusher-compatible WebSocket service built on Cloudflare, for developers needing realtime messaging infrastructure instead of switching to Pusher or Ably.
What to know▼
How it works
Drop-in replacement for Pusher using the same protocol, built on Cloudflare.
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An open-source SDK that unifies multiple payment providers (Paystack, Flutterwave, Razorpay, Monnify, Interswitch) behind one API, instead of integrating each provider separately across web, mobile, and no-code platforms.
FreeOpen source
What to know▼
How it works
Native SDKs for React, Vue, Svelte, React Native, Flutter, iOS, Android, plus no-code plugins for Shopify, WordPress, Webflow, Wix, Squarespace.
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Replays Chrome Network requests locally so developers can debug APIs without sending request data to a hosted workspace, instead of using cloud-based API clients.
Works offline
What to know▼
How it works
Copy any Network request as cURL, import into Pulse, edit and rerun locally; supports collections, JSON paths, diffs, validation tests, exports.
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An SDK and runtime that generates a personalized interface per user on top of a SaaS company's existing codebase, without a custom engineering build for each variant.
What to know▼
How it works
Ships shared primitives; each user's interface is generated, compiled, and sandboxed per request
Best for
B2B SaaS teams wanting per-user interfaces without custom engineering
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A Django REST Framework-style ViewSets library for FastAPI that generates full CRUD endpoints from one class, for developers who don't want to hand-write routes.
What to know▼
How it works
Registers LIST/GET/POST/PUT/PATCH/DELETE from a single class, with SQLAlchemy, Tortoise, or Peewee support and OpenAPI schemas.
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An open-source Python framework that auto-generates a REST API, admin back-office, and React CRUD UI from your data models, for developers building internal tools locally.
Works offlineOpen source
What to know▼
How it works
define data models once in Python; generates API, admin panel, and UI automatically
What's different
open source, local-first, data stays on your infrastructure
Best for
developers building CRUD apps without hand-building each layer
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Handles form submissions, spam protection, email notifications, and file uploads through a single endpoint you point your HTML form to, instead of building a backend for form handling.
What to know▼
How it works
Point any HTML/JS form to one endpoint; it handles submissions, spam protection, notifications, autoresponders, uploads, and signed webhooks.
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News search API that matches articles by conceptual meaning rather than keyword matching.
What to know▼
How it works
Users describe what they're watching for in natural language, and the API returns scored, deterministic, auditable news results matched by conceptual meaning rather than keywords.
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Bundles auth, payments and a database into one integration for indie hackers building digital products, instead of wiring together separate services and fragile webhooks yourself.
Watch out · Currently limited to 100 early-adopter developer signups rather than being generally available.
Free
What to know▼
How it works
Bundles authentication, payments and a database into one system for indie hackers launching digital products, integrated with a single command instead of stitching together separate services and webhook logic. An AI agent handles the setup, and billing, access and customer data stay in sync automatically.
What's different
Positioned as 'Stripe for indie hackers' — one integration instead of assembling auth, payments and a database from separate tools.
Pricing
Free for the first 100 early-adopter developers who sign up.
Best for
Indie hackers building and launching digital products who want backend infrastructure handled for them.
Watch out
Currently limited to 100 early-adopter developer signups rather than being generally available.
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An API for developers to verify email addresses (catching invalid, disposable, typo and role-based emails) before they enter a signup form or campaign.
What to know▼
How it works
one API call combines 15+ checks with a 0-100 trust score, under 100ms; also supports CSV batch processing
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A native desktop app development toolkit with its own markup, state model and renderer, for developers who want to skip Electron or a WebView.
What to know▼
How it works
A toolkit for building native desktop applications with declarative markup, a message-based state model, a component library, and its own native renderer.
What's different
No browser, no WebView involved — it's a fully native renderer rather than a wrapper.
Best for
Developers who want to build desktop apps without going through Electron or a WebView.
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A REST API and TypeScript SDK for NYC real-estate data — listings, building records, price history — with a free no-key tier and a hosted MCP server for AI agents.
Free
What to know▼
How it works
A REST API and TypeScript SDK for NYC real estate data — rental and sale listings, building records, neighborhood boundaries, price history and market snapshots, returned as JSON. Also ships a hosted MCP server so AI agents can query listings directly, plus signed webhooks, SSE streaming and OAuth.
What's different
Fills a gap where no official public API exists for NYC real estate listings.
Pricing
Free tier needs no API key for search, areas and market tools; paid plans add full listing/building detail, faster data freshness and higher limits.
Best for
Developers building applications or AI agents that need structured NYC real estate data.
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A unified API gateway for testing multiple LLMs like Qwen and GLM through one OpenAI-compatible key, for developers who don't want to wire up separate provider APIs.
Free
What to know▼
How it works
OpenAI SDK-compatible endpoint with auto-fallback on upstream errors
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A fast, privacy-first desktop REST API client built as a Postman alternative — for developers who want a local tool without their request data passing through a third-party cloud.
Data stays with you
What to know▼
How it works
A desktop REST API client built with Wails, Go and React for making and managing API requests.
What's different
Positioned as a privacy-first Postman alternative — a local desktop tool rather than one that routes requests through a third-party cloud.
Best for
Developers who want a fast desktop REST client without their request data passing through a third-party cloud service.
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Turns a single HTTP POST request into a push notification on your phone, for developers wanting alerts from CI, cron jobs, or webhooks without building an app.
Free
What to know▼
How it works
Send a POST request with a publish key and it's delivered as a push notification via topics
What's different
No SDK or account setup needed to send an alert
Pricing
Free to receive notifications
Best for
Developers wanting alerts from scripts, CI, or webhooks
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A Laravel package that wires up both the official WhatsApp Cloud API and personal-account WhatsApp connections behind one facade with an admin dashboard.
What to know▼
How it works
single facade covering Cloud API (templates/transactional) and a web-based personal-account connection (groups, status, freeform chat)
Best for
Laravel developers needing WhatsApp features Cloud API alone doesn't cover
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Free browser-based PDF and photo editing tools (edit, compress, convert, OCR) that never upload files, for privacy-conscious users avoiding paid software or sign-ups.
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Validates Tax ID numbers against country-specific rules for all 249 countries, showing exactly which checks passed or failed rather than a plain valid/invalid.
Free
What to know▼
How it works
Checks length, structure, checksum, and format rules per country via web UI or REST API
What's different
Shows rule-level detail instead of just valid/invalid
Best for
Developers and compliance teams validating TINs before they enter a system
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Say gm to AI | One private API for Claude, GPT & Gemini
What to know▼
How it works
OpenAI uyumlu tek uç noktadan Claude, GPT ve Gemini'ye bağlanırsınız; gateway donanım imzalı enclave içinde çalışır, açık modeller de enclave içinde çalıştığı için istem kimse tarafından görülmez.
What's different
OpenRouter'a göre daha ucuz ve donanım seviyesinde doğrulanabilir gizlilik iddiası var.
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An open chat protocol (MCP + SDK) for developers to connect business backends to AI agents instead of building custom integrations per project.
What to know▼
How it works
An open chat protocol (MCP + SDK) designed to bridge business backends and AI agents, replacing custom chat integrations, webhooks, and billing flows built per project.
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A visual, drag-and-drop builder for chaining AI models like GPT-4o, Gemini, and ElevenLabs into workflows, then exposing them as ready-to-use API endpoints for developers.
What to know▼
How it works
A visual, drag-and-drop canvas for building multimodal AI workflows across text, image, video and voice, connecting models like GPT-4o, Gemini, Veo and ElevenLabs, then publishing the workflow as an API endpoint.
What's different
Turns a visual node workflow directly into a production-ready API endpoint without separate backend work.
Pricing
Free to start.
Best for
Developers building AI-powered apps, backend automations or content pipelines without wanting to write backend code from scratch.
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A self-hosted agent that lets you talk to any REST API in plain English through its MCP layer, using your own LLM such as Ollama — built for developers.
Open sourceSelf-hosted
What to know▼
How it works
A self-hosted agent with an MCP layer that lets you talk to any REST API in natural language, using your own LLM (e.g. Ollama) instead of a hosted one.
What's different
Bring-your-own-LLM and fully self-hosted, so API credentials and data stay under your control.
Best for
Developers who want to interact with REST APIs conversationally while keeping their own LLM and data ownership.
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An API that pulls a company's logo, favicon, color palette and brand metadata from any domain, letting developers fetch brand assets programmatically instead of collecting them by hand.
What to know▼
How it works
An API that extracts a company's logo, favicon, color palette and brand metadata from any domain in one call.
What's different
Returns structured brand assets programmatically instead of collecting logos and colors by hand.
Best for
Developers who need to fetch brand assets for other companies automatically.
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Enterprise gamification infrastructure — a design studio, engine and embeddable widgets for adding badges, streaks and leaderboards to a product, integrated via code by engineering teams rather than used directly by consumers.
What to know▼
How it works
Embeddable gamification infrastructure — a design studio, engine and widgets that turn a product's existing user events into buddies, badges, streaks, marketplaces and leagues, designed across six frameworks.
What's different
Embeds with one line of code rather than requiring a custom-built gamification system.
Best for
Engineering teams adding gamification to an existing product.
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A single API gateway routing to multiple Chinese-made AI models with transparent pricing, for developers who want one integration instead of many accounts.
What to know▼
How it works
A single unified API that routes requests to multiple Chinese frontier AI models, with transparent pricing and no added platform markup.
What's different
Provides one integration point for several Chinese AI models instead of separate accounts and APIs for each.
Best for
Developers who want to access Chinese AI models through a single API integration.
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Converts old or PDF-based API documentation into an OpenAPI spec, Postman collection and client SDKs automatically, saving developers from manually transcribing messy legacy docs.
What to know▼
How it works
You drop in legacy or PDF-based API documentation and it produces a clean OpenAPI spec, a ready-to-import Postman collection, and client SDKs, without manual transcription.
Best for
Developers integrating against old, messy or poorly-documented APIs who want machine-readable specs instead of transcribing docs by hand.
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An API that watches any URL for changes, extracts structured data via CSS/XPath/JSONPath or AI, and pushes alerts to webhook, Slack, Discord or email — a developer tool for automated change tracking.
What to know▼
How it works
Monitors any URL for changes and extracts structured data using CSS, XPath, JSONPath, or AI, then sends webhook, Slack, Discord or email notifications the moment updates are detected.
Best for
Developers building automated data tracking or alerting workflows around web pages.
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An open-source framework for developers and integrators to build custom business communication apps like auto-attendants and fax-to-email — a toolkit, not ready-to-use software.
Open source
What to know▼
How it works
An open-source communications framework that lets developers build custom communication applications such as auto attendants, fax-to-email and click-to-call, with custom business logic controlling incoming and outgoing communication.
What's different
Serves as a common server-side backend for CTI-related projects rather than a ready-to-use application.
Best for
Developers and integrators building custom telephony or communication applications.
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Bundles five small free-tier developer APIs (WHOIS, company lookup, email validation, geolocation, sanctions screening) as a cheaper alternative to separate paid subscriptions.
Watch out · Built with Cursor AI; open source on GitHub.
FreeOpen source
What to know▼
How it works
Bundles five production APIs: Domain WHOIS via RDAP, Company Info from Wikipedia/Wikidata, Email Validator with MX+SMTP, IP Geolocation with dual-source fallback, and a Sanctions Screener with 20K+ OFAC/UN entities.
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A curated GitHub list of 50+ free AI API providers for developers who want LLM access without paying — a reference directory, not a product that offers its own API.
Free
What to know▼
How it works
A curated GitHub list documenting over 50 free AI API providers, compiled for developers who want LLM access without paying.
Pricing
Lists free-tier AI API providers.
Best for
Developers building hackathon projects or learning to code who want zero-cost LLM API access.
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A free, open-source CLI and web tool that turns an OpenAPI spec into a ready-to-use client SDK in TypeScript, Python, Go, Dart or Java — a developer tool, not an API service.
FreeNo sign-upOpen source
What to know▼
How it works
Turns an OpenAPI spec into a production-ready SDK in TypeScript, Python, Go, Dart or Java, with a code preview, ZIP download, a CLI (npx sdkcraft), API change detection, and an AI documentation generator.
What's different
Free, open source and requires no signup.
Pricing
Free and open source.
Best for
Developers who need a client SDK generated from an existing OpenAPI spec instead of writing one by hand.
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A free API returning real-time air quality data (AQI, PM2.5, PM10) with strong coverage of Indian cities, plus an endpoint suggesting the best time window to go outside.
Free
What to know▼
How it works
Single API call returns AQI/PM2.5/PM10 and a safe/caution/avoid verdict
What's different
Better Indian city coverage than typical global AQI APIs
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An edge-native transactional email service for Next.js/Vercel/Cloudflare apps, with a self-hosted open-source option, for developers who don't want to run their own email infrastructure.
Open sourceSelf-hosted
What to know▼
How it works
An edge-native transactional email service for Next.js, Vercel and Cloudflare Workers, with an open-source self-host option.
What's different
Runs at the edge alongside the deploy rather than as a separate hosted email service, and can be self-hosted.
Best for
Developers on Next.js/Vercel/Cloudflare who want transactional email without running their own infrastructure.
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Packs an entire web app or documentation site into a single offline ZIP file that runs without breaking on JS/CORS restrictions, unlike typical offline export formats.
Works offlineOpen source
What to know▼
How it works
Maps a ZIP to memory and spins up a local HTTP server so the packed app 'thinks' it's online
What's different
Open source, avoids CORS breakage that plagues other offline formats
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Self-hosted, open-source REST API that exposes MyAnimeList data through 70+ read-only endpoints, requiring no database or API key.
Open sourceSelf-hosted
What to know▼
How it works
Exposes public MyAnimeList data through 70+ read-only JSON REST API endpoints covering anime, manga, characters, users, rankings, seasons, reviews, and recommendations; written in Go, runs as a single binary with no database, API key, OAuth flow, or MyAnimeList developer credentials required.
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A Python SDK for scripting multi-agent coding workflows, letting different AI coding agents implement, review, and compete on tasks in isolated git worktrees.
Open source
What to know▼
How it works
Lets developers script the full development process in Python so agents like Claude Code and Codex implement independently, review one another, revise, run neutral tests, compete, and safely apply the winner, each working in an isolated Git worktree.
What's different
Open source, includes 40 multi-agent LLM paper workflows.
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An open-source MCP server that lets Claude answer read-only questions about your WooCommerce store — products, stock, orders, sales — via the official REST APIs; a developer tool to set up, not an end-user app.
Open source
What to know▼
How it works
An open-source MCP server that gives Claude or any MCP client read-only answers about a WordPress + WooCommerce store — products, stock, recent orders, sales reports and blog posts — via the official REST APIs with read keys.
What's different
Read-only by design: no writes and no plugin installs, just the official REST APIs.
Pricing
Open-source (free to self-host).
Best for
Developers setting up Claude or another MCP client to answer questions about their WooCommerce store.
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Spins up a disposable URL to inspect incoming webhook payloads, plus an MCP endpoint so a coding agent like Claude Code or Cursor can read captures and help debug.
FreeNo sign-up
What to know▼
How it works
Creates disposable webhook URLs to capture and inspect incoming payloads; requests can be viewed live, replayed, or forwarded to localhost.
What's different
MCP endpoint lets a coding agent like Claude Code or Cursor read captured payloads directly and help debug the failing webhook.
Pricing
Free forever.
Best for
Developers debugging webhook integrations who want no sign-up and no setup.
Tools for building and consuming APIs — the short answers
Every number here comes from our own daily check — not from a vendor list.
Tools for building and consuming APIs — how many are there?
Tablif is tracking 294 of them. 290 answered our check today, and 3 we couldn't reach — we don't claim those are dead.
Which ones are still maintained?
Tablif knocks on every door once a day and records the answer. 290 of these 294 responded on the latest run, so that number is what "still here" means on this page — not a review score.
Are any of them free?
50 of the live ones say so in their own words, and 12 let you start without making an account. Tablif records the claim the product makes; we don't verify pricing.
Any open-source options?
22 of the live ones on Tablif mention being open source.
What's the newest one?
Owl NoSQL & Storage — Tablif first saw it today.
Did a person actually look at these?
288 of them Tablif opened and read, then wrote a one-line summary in our own words instead of reusing the founder's tagline. The rest carry keyword labels we haven't confirmed by reading yet — and we say so rather than hiding it.
