Free
Free
$0 forever on the AgentsKB pricing page with no signup required.
- Requests
- Unlimited requests with 20 req/sec per user rate limit
- Coverage
- 39,827+ Q&As across 244 domains listed on pricing
Finding the possibilities
AgentsKB
● Identity checkedResearch · Vendor site 2026-10-04
AgentsKB is a verified Q&A knowledge layer for AI agents covering APIs, SDKs, and frameworks. It offers instant answers from a curated corpus plus a research mode for new domains, delivered through MCP and a free REST API without signup.
- Category
- Research
- Free access
- Pricing states $0 forever with unlimited requests, no signup, and no API key required, subject to a 20 requests per second per user rate limit.
- API access
- Homepage documents MCP at mcp.agentskb.com and a REST ask endpoint at agentskb-api.agentskb.com with curl examples.
Is AgentsKB right for you?
A good fit for
Developers using Claude Code, Cursor, or custom agents who need sourced facts about libraries and infrastructure defaults without hallucinated doc links.
Before you choose
Free tier rate limit is 20 requests per second per user across single and batch calls.
Knowledge layer for agents
AgentsKB supplies sourced technical answers so agents stop guessing about defaults in PostgreSQL, Next.js, Prisma, and hundreds of other domains.
What it can do
Features & capabilities
Unknown is different from unavailable. Each fact carries its own evidence.
| Capability | Value | Evidence | Checked |
|---|---|---|---|
| Instant mode | Homepage cites ~40ms responses from 39,827+ curated answers with official source links. | Facts sourced | 2026-10-04 |
| Research mode | Site explains research mode for technologies not yet covered, adding new verified answers to the corpus. | Facts sourced | 2026-10-04 |
| MCP setup | Docs snippet shows adding agentskb MCP URL to Claude Code, Cursor, or Cline configs. | Facts sourced | 2026-10-04 |
Understand the total cost
AgentsKB pricing & plans
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Frequently asked questions
Is AgentsKB really free?
Yes. Pricing states the service is completely free with no monthly caps, signup, or credit card, limited only by a 20 requests per second per user rate limit.
Do I need to sign up?
No. You can add the MCP server or call the REST API directly without an API key or authentication.
What is AgentsKB used for?
AgentsKB is a verified Q&A knowledge layer for AI agents covering APIs, SDKs, and frameworks. It offers instant answers from a curated corpus plus a research mode for new domains, delivered through MCP and a free REST API without signup.
Does AgentsKB have a free plan?
Pricing states $0 forever with unlimited requests, no signup, and no API key required, subject to a 20 requests per second per user rate limit.. This record lists ongoing free access; check the plan limits before starting.
How much does AgentsKB cost?
No paid monthly price is listed; this record treats the product as free to start. See the plan cards for entitlements, billing commitments and seat minimums.
Can I use AgentsKB through an API?
Homepage documents MCP at mcp.agentskb.com and a REST ask endpoint at agentskb-api.agentskb.com with curl examples.. API access and subscription access may have different terms; consult the linked sources.
What should I check before choosing it?
Free tier rate limit is 20 requests per second per user across single and batch calls.
Price history
No retained pricing changes yet. A current price alone does not establish a historical trend.
How this profile is supported
Identity and profile
Reviewed vendor source
Read original source ↗Facts apply to the named version and check date. Send a sourced correction if something changed.