How it works
- ✅ Fast: Direct API calls to provider endpoints
- ✅ Secure: All testing happens in your browser - no keys sent to our servers
- ✅ Simple: Just paste your key and click test
Filter by Category
AI
OpenAI
Test your OpenAI API key with the models endpoint
Anthropic Claude
Test your Anthropic Claude API key with the messages endpoint
Google Gemini
Test your Google Gemini API key with the generateContent endpoint
Groq
Test your Groq API key with the chat completions endpoint
DeepSeek
Test your DeepSeek API key with the chat completions endpoint
Cohere
Test your Cohere API key with the generate endpoint
CRM
HubSpot
Test your HubSpot API key with the contacts endpoint
Attio
Test your Attio API key with the records endpoint
Pipedrive
Test your Pipedrive API token with the deals endpoint
Customer Support
Zendesk
Test your Zendesk API token with the tickets endpoint
Intercom
Test your Intercom access token with the me endpoint
Freshdesk
Test your Freshdesk API key with the tickets endpoint
Data Enrichment
Clearbit
Test your Clearbit API key with the company enrichment endpoint
ZoomInfo
Test your ZoomInfo API key with the contacts endpoint
People Data Labs
Test your People Data Labs API key with the person enrichment endpoint
FullContact
Test your FullContact API key with the person enrichment endpoint
Pipl
Test your Pipl API key with the search endpoint
Demandbase
Test your Demandbase API key with the accounts endpoint
Enrich
Test your Enrich API key with the person enrichment endpoint
Datanyze
Test your Datanyze API key with the companies endpoint
Lusha
Test your Lusha API key with the contacts endpoint
Data Axle
Test your Data Axle API key with the business lookup endpoint
Coresignal
Test your Coresignal API key with the companies endpoint
Snov.io
Test your Snov.io API key with the leads endpoint
LeadGenius
Test your LeadGenius API key with the companies endpoint
Mattermark
Test your Mattermark API key with the companies endpoint
Crunchbase
Test your Crunchbase API key with the organizations endpoint
HG Insights
Test your HG Insights API key with the companies endpoint
Leadspace
Test your Leadspace API key with the contacts endpoint
Melissa
Test your Melissa API key with the address verification endpoint
SendGrid
Test your SendGrid API key with the mail send endpoint
Twilio
Test your Twilio Account SID and Auth Token with the messages endpoint
Resend
Test your Resend API key with the emails endpoint
Mailgun
Test your Mailgun API key with the messages endpoint
Brevo (Sendinblue)
Test your Brevo API key with the send email endpoint
Postmark
Test your Postmark Server Token with the email sending endpoint
SparkPost
Test your SparkPost API key with the transmissions endpoint
Amazon SES
Test your Amazon SES credentials with the send email endpoint
Loops
Test your Loops API key with the contacts endpoint
Payments
Stripe
Test your Stripe API key with the charges endpoint
❓ Frequently Asked Questions
How do I test my OpenAI API key?
Simply visit our OpenAI API Key Tester, paste your key (starts with "sk-"), and click "Test Key". We'll verify it works instantly.
Is it safe to test API keys here?
Yes! All testing happens in your browser - we never see or store your API keys. Your keys never leave your device.
What if my API key test fails?
Check the error message for specific issues. Common problems include invalid keys, expired keys, insufficient credits, or rate limiting.
Which API providers are supported?
We support 20+ providers including OpenAI, Google Gemini, Anthropic, Stripe, SendGrid, HubSpot, and many more.
Can I test multiple API keys?
Yes! You can test as many keys as you need. Each test is independent and secure.
Why do some providers use terminal testing?
Some providers use server-side authentication for enhanced security. We provide terminal commands for direct API testing with full compatibility.