Agent Router is an open-source, public-welfare AI API aggregation platform designed to unify access to agents and MCP tools. It is 'forever free' for both users and developers, providing a discovery registry for skills (ClawHub) and a live A2A directory.

Offers $100-$200 free credit bonus for new accounts to bootstrap agent usage.

AnyRouter is a third-party relay that forwards Claude Code and OpenAI Codex traffic through an Anthropic- and OpenAI-compatible endpoint at https://anyrouter.top. Registration is via GitHub or LinuxDO, and the official docs advertise a $50 free credit on signup with no credit card required, plus $50 for each side on a successful referral. Rates are expressed as billing multipliers rather than an open price list - the docs recommend Claude 4 Sonnet for routine work because it bills at one fifth of Claude 4 Opus. Dated notices track model availability (GPT 6 on 2026-09-05, GPT 5.5 on 2026-05-26) alongside a documented record of attacks, abuse-driven registration freezes and a one-day outage.

docs.anyrouter.top states the signup grant as $50 free credit with no credit card required, plus $50 for each party on a successful referral (registration notice on anyrouter.top, fetched 2026-09-16).

MonkeyAPI (monkeyapi.apimonkey.online) is an anonymous individual relay service built on the New API framework. In late 2026, the service operator reported penalties for violations and announced plans to migrate, significantly reducing quotas and referral benefits.

Previously offered registration credit and check-in/referral bonuses, but notices state it is 'cutting referral and registration quotas for cost control' and will adjust after migrating; no stable public free flagship quota.

FreeTheAi is a free OpenAI-compatible API gateway aggregating 80+ models behind a single base URL. It operates via Discord-based key signup and daily check-ins, emphasizing persistent free access for developers and roleplay users without credit card requirements.

Fully free, no card; daily /checkin (key validation + human challenge) required before calls. Default cap 250 successful calls/day (role-based bumps) ~ $7.5/mo equivalent at ~1K tokens/call, $1/1M tokens.

Pollinations.ai is a Berlin-based open-source platform providing a signup-free, OpenAI-compatible API for text, image, and audio generation. It aggregates multiple open-weights models (DeepSeek, Qwen, Mistral) and offers them for free to foster creative AI development.

Basic use needs no signup and no API key; new Pollen credit system gives ~1.5 Pollen/week free, with some models/higher limits requiring an account or paid tier. Pollen has no published USD rate - not quantifiable.

ChatAnywhere is a widely used free LLM relay. Users bind a GitHub account to get a free API key and access GPT-4o, Claude, and Gemini models through an OpenAI-compatible interface, optimized for access from mainland China.

GitHub-bound free key: 10,000 points/day with per-model caps (GPT-5/4o/4.1 5/day, DeepSeek 30/day, mini models 100/day, ~200 req/day total) ≈ $2/mo; personal non-commercial use only.

RouterPark is a directory and monitoring site for unofficial and free AI model relays. It catalogues third-party Claude and GPT proxies, providing a dashboard for status and latency while offering its own unified entry point for multiple 'free' upstreams.

Directory is free/login-free; any.routerpark.com proxy (ANTHROPIC_BASE_URL) signup credit: site advertises $20 but probes report ~$2 (+~$10 for posting). Conservative: $2; quota depends on third-party relays.

Hvoy AI is a specialized diagnostic and directory site for third-party AI API gateways. It performs continuous latency, uptime, and model-adulteration testing to help developers benchmark and select relay providers. Mirrored at hvoyai.com.

The site is primarily a checker/comparison tool; minor perks: ~20 points on signup, ~10 points to claim one free token, ~20 points for sharing, plus an occasional ~5 CNY (≈$0.74) redeem code; it claims a small daily 'freebie' of reverse-proxied sonnet-4.6/gpt5.3 (e.g. ~50 sonnet4.6 calls/day), with no guaranteed quota or stability.

DeepSeek's official API serves the current V4.1-Flash and V4-Pro models with 1M-token context and 384K max output, from $0.15/$0.60 per 1M in/out off-peak (Flash) — peak hours bill at 2x, cached input drops to $0.003/M. One key exposes both an OpenAI-compatible and an Anthropic-compatible endpoint, and sign-up grants a free token balance that is deducted before any top-up.

Free 'granted balance' of ~5M tokens at sign-up (deducted before top-ups per official billing rules); $0.70 is an estimate at V4-Flash off-peak rates.

Hugging Face Inference Providers routes one API key across 200+ models from multiple inference providers at the providers' own rates — no markup. Every user gets monthly credits ($0.10 on the Free plan; $2.00 PRO; $2.00/seat Team & Enterprise) applied automatically before pay-as-you-go; a BYOK mode routes through your own provider keys instead.

Official docs: $0.10/month Inference-Providers credits for Free users (PRO $2.00/month, Team/Enterprise $2.00/seat), credited monthly and applied before pay-as-you-go (confirmed 2026-09-16).

9Router is a specialized AI API router designed for smart fallback and cost optimization, allowing users to pool their own subscription keys. It emphasizes 'unlimited free AI coding' by routing through free models or maximizing existing subscriptions via a local proxy or VPS.

9Router is free open-source self-hosted router software (never charges); 9router.xunleiyk.com is a hosted instance ('AI Infrastructure Management' panel, auth-gated). No credits/billing tiers apply.

Open-source local AI router (npm package '9router', MIT license, Next.js, by decolua). Connects CLI coding tools (Claude Code, Codex, Cursor, Gemini CLI, Cline, OpenCode, Antigravity, Copilot and any OpenAI/Claude-compatible client) to 40+ AI providers and 100+ models through a local OpenAI/Claude-compatible endpoint. Features: RTK token compression (20-40% savings on tool results), auto-fallback (subscription -> cheap -> free), multi-account round-robin, web dashboard. Self-hosted; users bring their own upstream accounts/keys. Implementation inspired by CLIProxyAPI.

Software is free (MIT); it routes through user-provided upstream accounts, no credits or prices from the router itself.

AI Horde (Stable Horde) is a free, volunteer-run, community-powered network of donated GPUs that generates AI images (Stable Diffusion, SDXL, Flux and other diffusion models) and text. Anonymous access is available with the shared key 0000000000 at lowest priority; registering for kudos raises priority.

Free kudos-based system; no quantified monthly USD credit.

All API Hub is an open-source browser extension and account manager for the New-API/Sub2API ecosystem. It provides a unified dashboard for tracking balances, usage, and auto-checking across multiple relay providers, rather than serving as an API endpoint itself.

Free open-source tool that grants no model quota itself; its docs only teach users how to farm check-in/free allowances on other relays. No free API value is provided here.

Arena.ai (formerly LMArena / Chatbot Arena, lmarena.ai) is a free, anonymous multi-model chat + blind A/B voting service that powers the public LLM/image/code leaderboards. It rotates a large lineup of frontier and open models. This route is an unofficial web-cookie integration (arena-auth cookie, optional Cloudflare clearance/reCAPTCHA tokens); the site also supports anonymous sessions but automated access is rate-limited and subject to bot checks.

A free tier is available; the exact credit value is not quantified.

Auggie is Augment Code's free, terminal-based agentic coding CLI (npm i -g @augmentcode/auggie) that runs context-aware agents locally with interactive and headless modes. It is multi-model (Claude, GPT, or bring-your-own-key); the broader Augment 'Cosmos' platform is the company's enterprise offering.

Free CLI tier; enterprise/Cosmos pricing not publicly quantified on the fetched pages.

Open-source Go proxy server (MIT license, router-for-me/CLIProxyAPI) that wraps CLI subscriptions - Google Antigravity/Gemini, OpenAI ChatGPT Codex (GPT series), Anthropic Claude Code, xAI Grok Build, Moonshot Kimi - and exposes them as OpenAI (incl. Responses), Gemini (incl. Interactions), Claude, Codex and Grok compatible API endpoints. OAuth login flows, multi-account round-robin load balancing, streaming/non-streaming/WebSocket, function calling, multimodal input, Management API, and an embeddable Go SDK. Self-hosted; users bring their own upstream accounts/keys. Desktop wrapper: EasyCLIProxyAPI.

Software is free (MIT); access to upstream models depends on user-provided subscriptions/API keys, no credits or prices from the proxy itself.

Chipotle 'Pepper' is the free, anonymous customer-support chatbot on amelia.chipotle.com, powered by IPsoft Amelia. It requires no login (anonymous sessions) and answers only Chipotle-related questions; off-topic prompts are refused.

Free anonymous support chatbot; no credit system.

no-auth access — no key or sign-in required. Authentication is owned by the official Devin CLI in its isolated bridge volume. This entry is an access surface/agent — it routes to third-party models rather than hosting its own.

A free tier is available; the exact credit value is not quantified.

Dola (dola.com) — ByteDance's international AI chat assistant (international Doubao) serving the Doubao Seed model family. Unofficial browser/cookie integration.

A free tier is available; the exact credit value is not quantified.

Duck.ai is DuckDuckGo's free, private AI chat (also surfaced at duckduckgo.com/duckchat). It requires no account and offers chat, voice, image, and search across models including OpenAI GPT (e.g., '5.6 Luna') and Claude.

Free anonymous chat; an 'Upgrade'/Pro option exists but pricing not quantified on fetched pages.

FreeInference (freeinference.org) is an OpenAI- and Anthropic-compatible inference API offering frontier open models free of charge to the research community, with no credit card required at signup. It is presented as built at Harvard SEAS (MadSys Lab) and lists NVIDIA and Harvard SEAS as sponsors. The quota is described only as a "generous quota for research and prototyping"; no numeric limit is published, and the /pricing and /limits paths both return 404. The site carries a banner warning that GLM, Minimax and Kimi will be discontinued on Oct 1, and on Aug 11, 2026 it announced that new account onboarding is paused because the service is at capacity.

No free tier stated on official pages (checked 2026-09-16): freeinference.org offers a free account with a "Generous quota for research and prototyping" but publishes no dollar or token figure, and freeinference.org/pricing returns 404.

Freebuff is a specialized AI API relay often associated with developer automation and coding tools. It provides programmatic access to high-end models for free or via community-shared keys, primarily aimed at script-based integration and tool builders.

No public free-tier information found in the source reference; treat free-tier availability as unverified rather than confirmed absent.

GitHub Models was GitHub's hosted model playground, model catalog, inference API and bring-your-own-key service, and GitHub previously presented it as separate from GitHub Copilot. GitHub's official documentation now states that as of July 30, 2026, GitHub Models has been fully retired: the playground, model catalog, inference API and BYOK are no longer available to any customer. The same page directs users needing model access to Azure AI Foundry and users wanting AI workflows on GitHub to GitHub Copilot.

No free tier stated on official pages; GitHub Models was fully retired on July 30, 2026 with no playground, catalog, inference API or BYOK access remaining (checked 2026-09-16).