Checkbooth
Independent signed math checks for AI agents: PASS or FAIL plus a link anyone can open. Free beta.
What it does
Checkbooth is an MCP server, a connector that lets an AI assistant use it as a tool. It is hosted: an assistant connects to it over the internet, nothing to install.
No capability identified yet from its description.
Facts come from the Official MCP Registry, as declared by the publisher. Capabilities are matched automatically (low confidence). None of this is a test of the tool.
At a glance
How to connect
As declared in the Official MCP Registry · hosted endpoint tested by Electra Index 3h ago (live check)Hosted endpoint
https://checkbooth.dev/mcpstreamable-http
In Claude Code: claude mcp add --transport http checkbooth https://checkbooth.dev/mcp
MCP settings (Claude Desktop, Cursor and other MCP clients)
{
"mcpServers": {
"checkbooth": {
"url": "https://checkbooth.dev/mcp"
}
}
}Live check
Electra Index connected to the hosted endpoint 3h agoONLINE Checkbooth answered an MCP connection on 09 Nov 2026 and introduced itself as checkbooth 0.1.0-beta (MCP protocol 2025-06-18).
12 tools offered to AI assistants
discover_capabilities· List the whole Checkbooth tool chest with honest status tags (BUILT, COMING, ON REQUEST). Filter by words, drawer or status. Free.verify_math_or_tolerance· Independent, signed recompute of your numbers: formula, worst-case tolerance stack, power budget, Nyquist sampling, or rated range. Returns PASS/FAIL/INVALID and a receipt a second party can check at /check. Planning and math verification crun_slice_tool· Run one of our tested house math slices (sound speed, echo range, drop shock, field magnitude and more) on YOUR inputs. Only slices whose worked examples reproduce exactly are callable. Each result carries the slice's own limits. Planning arun_slice_chain· Run up to 8 checks or slice tools in one call and get ONE signed bundle receipt. Planning and math verification check only — not a licensed professional engineering review, stamp, or sign-off.quote· Exact credit price of any capability before you spend anything. Free.verify_report_receipt· Check that a Checkbooth receipt is genuine and unchanged. Free, no key needed.request_capability· Vote for a COMING capability, or describe one we do not list. Free; helps decide what opens next.seal_bundle_receipt· Verify 2 to 20 of your Checkbooth receipts and seal them into ONE signed design-review bundle with a single /check link.verify_trig_expression· Recompute a formula that uses trig (sin, cos, tan, asin, acos, atan; degree forms sind, cosd, tand, asind, acosd, atand) and compare it to a target. Signed receipt. Planning and math verification check only — not a licensed professional engaudit_text_rounding· Paste text (up to 8,000 characters). We find every inline "arithmetic = number" claim and recompute it at the stated digits. Signed receipt. We keep only hashes of your text.verify_claims_against_receipts· Paste a README, PR description, spec or memo plus the Checkbooth results it relies on. We check every number in the text against those signed results and flag overclaim phrases (for example "verified across all conditions", "guaranteed", "cissue_sandbox_key· Get a free capped beta key (bb_test_...). Shown once; we keep only its hash.
What "online" means: the server answered an MCP connection at the time of the check. It is not a guarantee of security, quality or continuous uptime. How we test: we open an MCP session and ask for the tool list, as an AI assistant would. We never run a tool and never send a key. Checked every few days. Method
Is this your server? Monitoring Pro: a check every 30 minutes and an email within the hour when it stops answering. Launch offer: $39.99 once, for life.
Facts & evidence
Each fact shows where it was seen and when.| Fact | Value | Evidence | Source | Last confirmed |
|---|---|---|---|---|
| Version | 0.1.1-beta | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Hosted endpoint | https://checkbooth.dev/mcp | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Local install (package) | no | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Remote access (hosted) | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Website | https://checkbooth.dev | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| Registry status | active | DECLARED | SRC-001 Official MCP Registry | 1h ago |
| MCP server | yes | DECLARED | SRC-001 Official MCP Registry | 1h ago |
Change history
- VERSION09 Nov 20260.1.0-beta → 0.1.1-beta
- NEW09 Nov 2026first seen in the index
Is this page accurate?
Flag it and our robot re-checks the official source. Reports never change a score.Is Checkbooth still online?
Free alerts · no account▲ 0Do you run Checkbooth? Know when it stops answering
For publishers · optionalIts hosted endpoint can be monitored. Monitoring Pro connects every 30 minutes like an AI assistant, emails you within the hour when it stops answering, keeps a 90-day availability history and adds your answer rate to your badge.
Monitoring never changes a score or a rank.
Are you the publisher of Checkbooth?
Free · show your listingAn independent listing builds trust with your buyers. Announce it, and add the badge to your website or README.
<a href="https://electraindex.com/mcp/checkbooth?utm_source=badge&utm_medium=share&utm_campaign=listing"><img src="https://electraindex.com/api/badge/checkbooth" alt="Listed on Electra Index"></a>Questions about Checkbooth
How do I connect Checkbooth?
Use the hosted endpoint https://checkbooth.dev/mcp in your assistant's MCP settings. The exact settings are in "How to connect" above, as declared in the Official MCP Registry.
What tools does Checkbooth offer?
When Electra Index connected on 09 Nov 2026, it listed 12 tools: discover_capabilities, verify_math_or_tolerance, run_slice_tool, run_slice_chain, quote, verify_report_receipt, request_capability, seal_bundle_receipt and more. The full list is in "Live check" above.
Is Checkbooth online?
Yes. Its hosted endpoint answered an MCP connection from Electra Index 3h ago.