Free. No limits.
39,827+ researched answers across 244 domains. No signup, no API key, no credit card.
No limits. No catches.
- Unlimited requests - no monthly caps
- 20 req/sec per user rate limit
- Single + batch queries (up to 250 per batch)
- All 244 domains - PostgreSQL, Prisma, Next.js, and more
- MCP + REST API - works with any agent
- No signup required - just start using it
Everything included
39,827+ Q&As
Researched answers across 244 technical domains
REST API + MCP
Use via REST API or native MCP protocol
~40ms response time
Instant answers from pre-researched knowledge base
Frequently Asked Questions
Is AgentsKB really free?
Yes. Completely free. No monthly limits, no signup required, no credit card. The only limit is 20 requests per second per user to keep the service fast for everyone.
What's the rate limit?
20 requests per second per user. This applies to both single and batch requests combined. That's 1,200 requests per minute or 1.7 million per day.
Do I need to sign up?
No. Just add the MCP server or call the REST API directly. No API key, no signup, no authentication required.
Why is it free?
We believe knowledge should be accessible. AgentsKB makes AI agents more reliable by giving them verified facts. The more agents use it, the better the coverage gets for everyone.
Will it stay free?
Yes. We're committed to keeping AgentsKB free for everyone. No bait-and-switch.