Models reason.
They don't remember.
AgentsKB gives your agent verified answers from official sources. Two modes, one goal: your agent always has the answer.
How it works
Instant mode
39,827+ Q&As pre-researched from official sources. Your agent asks, gets a verified answer in ~40ms, moves on.
- Same question, same answer, every time
- Every answer links to official source docs
- Explicit "unknown" when we don't have it
- 244+ technologies covered
Research mode
Technology not covered yet? Your agent asks, AgentsKB researches it from official sources and returns a verified answer. The coverage grows with every query.
- Ask anything - not limited to pre-loaded domains
- Researched from official docs in real time
- Once researched, it becomes instant for everyone
- Works for any domain - code, law, medicine, anything
What you get back
A JSON response with the answer, confidence, sources, and type.
Request
curl -X POST https://agentskb-api.agentskb.com/api/free/ask \
-H "Content-Type: application/json" \
-d '{"question": "What is the default max_connections in PostgreSQL 16?"}'Response
{
"answer": "100 connections. This is the default value set in postgresql.conf via the max_connections parameter.",
"confidence": 0.99,
"sources": ["https://postgresql.org/docs/16/runtime-config-connection.html"],
"domain": "postgresql",
"content_type": "fact"
}Built for how agents actually work
Deterministic
Same question returns the same answer. Across sessions, runs, and environments. Your agent can rely on it.
Explicit unknown
If we don't have it, we say so. Your agent knows when to escalate instead of trusting a hallucinated answer.
Bulk queries
Send 100 questions in one API call. Pre-load everything your agent needs before a complex task starts.
6 answer types
Fact, explanation, methodology, decision, reference, troubleshooting. Each structured differently for what your agent is trying to do.
Completely free
No monthly limits. No signup. Just 20 req/sec rate limit to keep things fast for everyone.
MCP + REST API
One line in your MCP config for Claude Code, Cursor, Cline. Or call the REST API from any language.
What's covered
39,827+ Q&As across 244+ technologies. Growing daily via research mode.
Databases
PostgreSQL, MongoDB, Redis, SQLite
Frontend
React, Vue, Next.js, TypeScript
Backend
Node.js, Python, Go, Rust
Cloud + Auth
AWS, Kubernetes, NextAuth, Prisma
Don't see your technology? Research mode can answer questions about anything.
The knowledge cutoff disappears.
Completely free. No limits. No signup required.