AI API Router Directory

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).

Requesty is an AI model gateway and router that aggregates over 600 models (Claude, GPT, Gemini, DeepSeek) through a single OpenAI-compatible API. It offers cost optimization, unified billing, and advanced routing features for enterprise and individual developers.

Free tier: 200 requests/day plus ~$6 signup credits (some sources say $10; conservative low end), no card required; beyond that Pro is pay-as-you-go at model cost +5%.

Cerebras Inference serves open-weight models on wafer-scale CS-4 hardware — gpt-oss-120b at ~3,000 tokens/s for $0.35/$0.75 per 1M in/out, Qwen 3.8 27B at $0.99/$1.49. The self-serve developer tier is pay-as-you-go with $5 of free credit to start; the enterprise tier (production capacity, priority limits, fine-tuning) is quote-based. Also available via AWS Marketplace, OpenRouter, Hugging Face and Vercel.

Self-serve developer tier includes $5 free credit to start (pricing page, checked 2026-09-16). Replaces an older $30 figure that no longer matches the official page.

FreeModel is a frontier model API router that provides a single, unified endpoint for top-tier models like GPT-5 and Claude Code. It features intelligent routing to optimize for output quality and cost, supporting OpenAI-compatible SDKs for seamless developer integration.

Official site: free plan '永久免费·无需信用卡' (forever free, no CC) incl. '注册即送 $5 API 额度' ($5 signup credit) + FRE-5.4/5.5 models. Community reported a $300 signup promo (May 2026, likely expired). OpenAI+Anthropic compatible.

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.

OpenRouter is a unified, OpenAI-compatible API aggregating hundreds of model providers behind one key. Free model variants (:free IDs) are genuinely free with documented platform caps — 20 requests/min and 50/day for accounts that have purchased under 10 credits, 1,000/day once you've purchased 10+ — while paid variants have no platform request cap. Fallback routing, per-key credit caps, and BYOK are built in.

:free models cost $0, no card; 20 req/min; 50 :free req/day with <10 credits, 1000/day after buying $10+ credits (verified FAQ; failed reqs count). ~$1.5/mo equivalent at 50 req/day, ~1K tokens/call.

FastRouter is a high-performance gateway for AI model routing, comparison, and operations. It supports 200+ models via an OpenAI-compatible API with intelligent cost optimization and failover. Details were checked against the provider's own page at fastrouter.ai.

Free credits included to build, test and explore.

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-ROUTER is an enterprise-focused AI API gateway providing unified access to OpenAI, Claude, and Gemini models. It uses a unique 'fuel package' and subscription model, offering managed quotas with daily, weekly, and monthly limits for intensive development and team workflows.

Paid ChatGPT relay with time-boxed packages only: daily $5.40-$35.10/day, weekly $26.10-$179.10 (Alipay/WeChat/crypto/Stripe). No free tier or signup credit found on site or in searches.

OAuth access — sign-in with your existing account. Google Antigravity 43 models tracked (via OpenRouter catalog).

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

Auriko is an AI API router and aggregator that provides a unified interface to multiple LLM providers. It offers both platform-managed and Bring Your Own Key (BYOK) modes. It publishes high rate limits for both modes.

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

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.

CatGPT is an AI chatbot/router service. Limited public information is available regarding its API documentation or enterprise-grade features. Details were checked against the provider's own page at catgpt.cc.

Domain serves only a default 'TestPage' placeholder; no active AI API service or free-tier information found on site or in searches.

web-cookie access — wraps the provider web app (unofficial). Paste the full ChatGPT Cookie header. OmniRoute verifies it in an isolated headless browser profile. 93 models tracked (via OpenRouter catalog).

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

OAuth access — sign-in with your existing account. Claude Code (Anthropic) 27 models tracked (via OpenRouter catalog).

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

Empower provides an AI API router with an OpenAI-compatible endpoint. It focuses on bridging multiple model providers (Llama, etc.) through a single gateway for standard clients and SDKs. Details were checked against the provider's own page at docs.empower.dev.

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

FenayAI is an AI API router and aggregator providing unified access to major models like GPT-6 Astra and Claude Fable. It features an OpenAI-compatible gateway with BYOK support. Details were checked against the provider's own page at fenayai.com.

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

web-cookie access — wraps the provider web app (unofficial). Paste the full grok.com cookie line from DevTools → Application → Cookies. Include both `sso` and `sso-rw` (e.g. `sso=...; sso-rw=...`) — Grok's anti-bot rejects `sso` on its own. 7 models tracked (via OpenRouter catalog).

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

HelixMind is an AI API router designed to manage and optimize costs across hundreds of LLMs through a single endpoint. It native speaks the OpenAI API format and features automatic model selection by price and task requirement, ensuring enterprise-grade reliability.

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

Huancheng Public API is a high-concurrency AI model router based on the New-API framework. It aggregates multiple upstream providers including OpenAI, Anthropic, and Google, offering a stable and low-latency endpoint for Chinese and global developers with real-time usage monitoring.

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

OAuth access — sign-in with your existing account. Sign in with the same Kimi account used by Kimi Code CLI. OmniRoute uses the CLI OAuth flow and Kimi Coding Plan endpoints. 8 models tracked (via OpenRouter catalog).

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

LLM Gateway is a unified AI API router that allows access to over 200 models from multiple providers. It features a 'Hosted Free' plan where free models are accessible with a 5 requests per 10 minutes limit when no credits are available in the account.

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