Integration · Anysphere

Use Crazyrouter as a custom model provider in Cursor

Cursor's BYOK mode accepts any OpenAI-compatible endpoint. Enter the Crazyrouter base URL once and route chat and agent traffic through your own key with live per-token pricing.

Get an API key

Manual configuration

No scripts needed — three fields in the Models settings page. Verify must succeed before Cursor lets you pick the model; the most common reason it fails is a base URL with the wrong path.

Cursor → Settings → Models

text

OpenAI API Key:            sk-your-crazyrouter-key
Override OpenAI Base URL:  https://api.crazyrouter.com/v1
Model (add custom):        claude-opus-4-8   (or gpt-5.5, deepseek-v4-pro …)
→ click Verify

Custom keys only apply to chat/agent models. Tab completion keeps using Cursor's own models — that is a Cursor limitation.

Base URL rule

https://api.crazyrouter.com/v1 — This tool is OpenAI-compatible and appends /chat/completions (or /responses) itself. Use the /v1 base URL exactly as shown.

Recommended models

Live Crazyrouter prices, refreshed hourly. Any model in the catalogue works; these are the ones we'd start with.

Claude Sonnet 5.5

claude-sonnet-5-5

$2.00 in · $10.00 out /1M tokens

GPT-6.1 Sol

gpt-6.1-sol

$2.00 in · $10.00 out /1M tokens

Claude Haiku 5.5

claude-haiku-5-5

$0.10 in · $0.50 out /1M tokens

FAQ

Which base URL goes in 'Override OpenAI Base URL'?

Exactly https://api.crazyrouter.com/v1. Not the root domain, not a full /chat/completions path.

Why does Tab completion not use my key?

Cursor documents that custom API keys apply only to standard chat models; Tab and some agent features use Cursor's own models.

Which model should I add first?

claude-opus-4-8 or gpt-5.5 for agent mode; deepseek-v4-pro when you want a cheaper default for chat.

Costs jumped after switching

Give Cursor its own token with a quota cap and a narrow model allowlist, so one shared key isn't drained by agent loops.

Guides and comparisons

Podcast

AI Dev Tools: The Crazyrouter Podcast

Short episodes for developers on AI APIs, gateways, cost control and coding tools.

Latest episodes

EP196 · Oct 29, 2026 · 6:53
AI API Security Posture — Turn Controls Into Continuous Evidence
A practical guide to AI API security posture: inventory exposure, verify controls continuously, protect keys and data, constrain tools, and turn security assumptions into evidence that operators can act on.
EP195 · Oct 28, 2026 · 7:21
AI API Policy Drift — Detect When Production Rules Stop Matching Intent
A practical guide to policy drift in AI APIs: version routing and safety rules, detect stale enforcement, compare intended and observed behavior, and restore control before small gaps become incidents.