By: Ryan Chen
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manifest.json
{
"manifest_version": 3,
"name": "Calcis: LLM Cost Estimator",
"version": "1.1.0",
"description": "See what your prompt will cost before you send it. Live cost estimates on ChatGPT, Claude, and Gemini.",
"browser_specific_settings": {
"gecko": {
"id": "calcis-cost-estimator@calcis.dev",
"strict_min_version": "113.0",
"data_collection_permissions": {
"required": [
"none"
]
}
},
"gecko_android": {
"strict_min_version": "113.0"
}
},
"permissions": [
"storage",
"activeTab"
],
"host_permissions": [
"https://chat.openai.com/*",
"https://chatgpt.com/*",
"https://claude.ai/*",
"https://gemini.google.com/*",
"https://www.calcis.dev/*"
],
"background": {
"scripts": [
"lib/browser-polyfill.js",
"background/background.js"
]
},
"content_scripts": [
{
"matches": [
"https://chat.openai.com/*",
"https://chatgpt.com/*",
"https://claude.ai/*",
"https://gemini.google.com/*"
],
"js": [
"lib/browser-polyfill.js",
"content/model-map.js",
"content/providers/chatgpt.js",
"content/providers/claude.js",
"content/providers/gemini.js",
"content/overlay.js",
"content/content.js"
],
"css": [
"content/content.css"
],
"run_at": "document_idle"
}
],
"action": {
"default_popup": "popup/popup.html",
"default_title": "Calcis: LLM Cost Estimator",
"default_icon": {
"16": "icons/icon-16.png",
"32": "icons/icon-32.png",
"48": "icons/icon-48.png",
"128": "icons/icon-128.png"
}
},
"icons": {
"16": "icons/icon-16.png",
"32": "icons/icon-32.png",
"48": "icons/icon-48.png",
"128": "icons/icon-128.png"
}
} Best Calcis: LLM Cost Estimator Alternatives
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