What is the best AI API gateway for coding agents in 2026?

Last updated October 26, 2026 by the APIClaw team

There is no single best gateway; it depends on what you need. A self-hosted open-source proxy suits teams that want to run their own, OpenRouter offers the widest catalog, Portkey adds observability, and Vercel and Cloudflare fit teams already on them. APIClaw suits heavy agent use with a flat monthly price from $19 and a daily request quota.

Disclosure and how to read this page

APIClaw is our product. This page is a roundup of six options, and we have tried to keep the claims about the other five conservative and general. Pricing and features change often, so treat every competitor description here as a starting point and check current pricing and documentation on each vendor's site before you decide.

The question is also narrower than "best gateway" in the abstract. Coding agents such as Claude Code, Cursor agent mode, Codex CLI, Cline and OpenCode behave differently from a chatbot: they send long, repeated contexts, they make many calls per task, and they run for hours. That changes which gateway features matter. Billing predictability, model switching and compatibility with the agent's API style tend to matter more than a polished playground.

What a gateway does

An AI API gateway sits between your tools and one or more model providers. Depending on the product, it gives you some mix of a single endpoint for many models, key management, caching, logging, rate limiting, fallbacks and billing. Some gateways are routers that resell model access. Others are control planes that sit in front of providers you pay directly. That difference decides who sends you the bill, so it is the first thing to check.

The six options at a glance

OpenRouter

OpenRouter is a pay-as-you-go router with a very large catalog across many providers. You buy credits and each request is charged at the underlying provider's per-token price. It takes a fee on credit purchases, 5.5% on the standard plan and 8% on Business, according to its pricing page. It is the strongest choice when you want the widest model choice, when your usage is light or bursty, or when you want to try many models without separate accounts. The tradeoff is that your bill follows your token volume. For a closer look, see our page on the OpenRouter alternative.

Self-hosted open-source proxies

Several open-source LLM proxies can run on your own infrastructure. They are free to self-host and gives you a single OpenAI-style interface over many providers, with features such as key management and spend tracking. Because it is self-hosted, you control data flow and configuration, and you also own the operations: deployment, upgrades, scaling and monitoring. You still pay each provider per token with your own provider keys. It is a good fit for teams that want control and already have the people to run it.

Portkey

Portkey is a gateway and observability control plane. Its focus is logging, tracing, guardrails, routing and governance across providers. Production use is priced at around $49 a month, so check current pricing, and you still pay your model providers per token. It is a good choice when your main need is seeing and governing what your applications and agents send to models, particularly in a team setting.

Vercel AI Gateway

Vercel AI Gateway is a gateway inside the Vercel platform that gives one interface to many models, billed per token. If your applications already deploy on Vercel and use its AI SDK, staying inside that ecosystem keeps setup and billing in one place. Check current pricing and model availability on Vercel's site.

Cloudflare AI Gateway

Cloudflare AI Gateway adds caching, logging and rate limiting in front of the providers you already use. You pay those providers directly, and Cloudflare provides the layer that observes and controls the traffic. It fits teams already on Cloudflare who want analytics and cost controls without changing providers.

APIClaw

APIClaw is a hosted gateway with a flat monthly price. Plans run from $19 to $129 a month, from 500 to 8,000 requests per day. There is no per-token billing and no cap on tokens per request beyond the model's own limit. The daily quota resets at 00:00 UTC, with no 5-hour window and no weekly cap. Heavier models count as more than one request: Claude Sonnet counts as 2, and Claude Opus and GPT-6 Sol count as 3. It speaks both OpenAI-compatible and Anthropic Messages, so Claude Code, Cursor, Codex CLI and similar agents work with a base URL change. Payment is by crypto through NOWPayments, and there is a free 50-request trial with no card. The weak points are honest ones: the catalog is smaller than OpenRouter's, and at low volume per-token billing is often cheaper than $19 a month. APIClaw is independent and not affiliated with Anthropic, OpenAI, Google or Cursor.

Pick by use case

Why billing shape matters for agents

Coding agents resend the whole conversation on every turn, so a long session can reach hundreds of thousands of input tokens per request. On a per-token gateway, every one of those tokens is on the invoice, whichever product sits in front. A control plane such as Portkey, Cloudflare or a self-hosted proxy helps you see and limit that spend, but it does not change the unit price. A flat-rate gateway changes the shape of the bill instead: the cost of a heavy day is already known. That is the single reason APIClaw exists, and it is only a reason to choose it if your usage is heavy and steady. For a plan-by-plan breakdown against OpenRouter, direct APIs and Claude Max, see the comparison page.

A simple way to decide

First, decide whether you want to operate infrastructure. If yes, a self-hosted open-source proxy is the natural starting point. If no, decide whether you want visibility or a lower bill. Visibility points to Portkey or Cloudflare, depending on where you already deploy. A lower and more predictable bill for heavy daily agent use points to a flat plan. A wide catalog for experiments points to OpenRouter. Many teams combine tools, for example a control plane in front of a flat-rate or per-token provider.

Try a flat plan before committing

If a flat plan sounds right, test it on your real workload. The free trial gives 50 requests with no card, which is enough to run a few agent sessions and see how the quota behaves. Then compare against your last per-token invoice. The flat-rate OpenAI-compatible API page explains the plan model in more detail, and the docs cover setup for each agent.