AI Tools via MCP
A second opinion, a mind-opener, and a babysitter for your AI — 127 tools that catch what your LLM misses, challenge what it assumes, and verify what it claims. One command. Pay per use.
Get Started
Use 50c tools in your app, your IDE, or any MCP-compatible platform. One key unlocks everything.
Create an account and grab a $5 credit pack or start a 14-day free trial.
Your API key is ready instantly. Copy it from your dashboard.
Use your key in any app, MCP client, or call the API directly. 127 tools at your fingertips.
$5 pack: 500 credits, no subscription, never expires. Trial: full Starter access, cancel anytime.
# Install and auto-configure for your IDE
npx 50c@latest install
# Or add manually to MCP config
{ "mcpServers": { "50c": {
"command": "npx", "args": ["-y", "50c@latest"],
"env": { "FIFTYC_API_KEY": "your-key" }
} } }
Why technical buyers switch
50c is built for teams that want deterministic outputs, sane pricing, and tools they can actually verify.
Deterministic
Your agent invokes a specific tool and gets a concrete result. Less roleplay. Less guesswork. More signal.
Usage-based
No seat tax. No annual contract. No wasted spend while you are still testing fit.
Verifiable
The best tools can be executed, challenged, or verified. That is the bar.
Why Your AI Needs a Second Brain
Your LLM gave you an answer. Is it right? Genius thinks step-by-step from scratch — a fresh perspective that catches what your AI assumed.
Your LLM says the code works. Does it? Run it in a sandbox and know for sure — before it hits production.
LLMs hallucinate. Web search and page fetch let your AI check its own claims against live sources — so you don't have to.
npx 50c@latest install — detects your IDE, writes your config. Smarter AI in 60 seconds flat.
Detect when your LLM loops, drifts, or hallucinates. Our tools monitor context health and verify constraints automatically.
Roast your code. Stress-test your prompts. Get 5 angles you never considered. Tools that push your AI beyond its comfort zone.
The Hard Questions
Most AI companies hide behind benchmarks. We publish the uncomfortable math.
When AI gets it wrong, who pays? We built the receipts into the system.
Ship tools that work in the field, not just in demos. Real problems, real constraints.
Millions wasted on AI that hallucinates. We did the math on what verification actually saves.
Real discoveries made with 50c tools. Not marketing claims — peer-reviewable results.
Pricing
Pay as you go or subscribe. No hidden fees. Credits never expire.
Starter
$29/mo
For individual developers
Pro
$99$49/mo
50% OFF LAUNCH
For power users and teams
Enterprise
$199/mo
Starting price · scales to $999/mo
For teams and agencies at scale
Foundation
Custom
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