# Commonpost MCP for Thunderbird (mcpb · commonpost-mcp-v0.19.0.mcpb) Mail, contacts, calendar and filters of Thunderbird for AI assistants, through a local add-on. - Trust score: 24/100 (low) - Registry status: active - Liveness: live - Owner verified: no - Last scored: 2026-11-06 ## Components - mcpb · `commonpost-mcp-v0.19.0.mcpb`: 24/100 (this document), [markdown](https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp.md), [page](https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp) ## Channel facts - Registry: `mcpb` - Package: `https://github.com/commonpost/thunderbird-mcp/releases/download/v0.19.1/commonpost-mcp-v0.19.0.mcpb` - Transport: `stdio` - SHA-256: `9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33` ## Trust breakdown How this component scores in each security and reliability category. Every signal is checked automatically from public evidence about the published package, including repeated runs of it in an isolated sandbox, and we only credit what we can confirm. Scores are 0–100 per category. Scoring method: https://verifymcp.io/docs/scoring (what has changed: https://verifymcp.io/docs/scoring/changelog) Scored 2026-11-06. - **Supply Chain Security**: 0/100 - No malware scan is available for this kind of package: the supply-chain vendors we use do not cover it. This is a permanent gap in our coverage, not a finding about the package. - Known CVEs could not be checked: we found no dependency list to check in this bundle: either it runs a compiled binary, whose bundled manifests we do not read, or none of the package.json, requirements.txt, pyproject.toml or uv.lock files it ships for its runtime declares a dependency we can read (a requirements.txt that only points at a setup.py project, a local path, or a nested requirements file we cannot follow counts as none). - Install-script risk not yet assessed. - Dependency health could not be checked: we found no dependency list to check in this bundle: either it runs a compiled binary, whose bundled manifests we do not read, or none of the package.json, requirements.txt, pyproject.toml or uv.lock files it ships for its runtime declares a dependency we can read (a requirements.txt that only points at a setup.py project, a local path, or a nested requirements file we cannot follow counts as none). - **Provenance & Transparency**: 100/100 - Source repository is publicly reachable at the declared URL. - Cryptographically verified build provenance (signed, bound to commonpost/thunderbird-mcp). - Clear OSI-approved license (MIT). - Actively maintained (last published 0 days ago). - Publishes a security disclosure policy (SECURITY.md). - **Schema Quality & AI Usability**: 0/100 - Schema quality not yet verified: our sandbox run could not list this package's tools (it declared tools, or its tool listing failed outright), so the captured schema is incomplete. - **Stability & Change Management**: 0/100 - Stability not yet verified: one of the two schema captures we compare could not list the server's tools (the server declared tools, or its tool listing failed outright). Comparing them would report every tool as removed, or find nothing to compare at all. - **Tool Coverage**: 0/100 - Tool coverage not yet verified: our sandbox run could not list this package's tools (it declared tools, or its tool listing failed outright). - **Tool Safety**: 0/100 - Tool safety not yet verified: our sandbox run could not list this package's tools (it declared tools, or its tool listing failed outright). - **Capabilities**: 100/100 - Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28. **Unverified: 5 categories.** Categories scored 0 because we could not verify them: a data source with nothing on this package, evidence we could not reach, or a check we could not run. We only credit what we can confirm. ## Install ### How do I install the Commonpost MCP for Thunderbird server? Commonpost MCP for Thunderbird ships as an MCPB bundle, a single file you download and open in an MCP host that supports MCPB bundles, such as Claude Desktop. The host reads the launch command from the bundle's own manifest, so there is no command to copy. Before opening it, check the file's SHA-256 matches the one the MCP registry declares for it, 9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33; the commands to do that are on this page. If it does not match, do not open it. - Download bundle: `https://github.com/commonpost/thunderbird-mcp/releases/download/v0.19.1/commonpost-mcp-v0.19.0.mcpb` - SHA-256: `9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33` ### Verify on macOS / Linux ```bash echo "9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33 commonpost-mcp-v0.19.0.mcpb" | shasum -a 256 -c ``` ### Verify on Windows (PowerShell) ```powershell (Get-FileHash -Algorithm SHA256 .\commonpost-mcp-v0.19.0.mcpb).Hash -eq "9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33" ``` ## Changelog Every change recorded for this component, newest first. Days that predate change tracking, or that we cannot explain, say so: "we were watching and nothing happened" and "we were not watching" are different claims. ### 2026-11-03 (score 24) First indexed and scored. ## MCP tools (0) The sandbox run completed and this package exposed no tools. ## Diagnostics Captured diagnostic sections: Provenance. The full working is on the page: https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp#diagnostics ## Score history - 2026-11-06: 24 - 2026-11-05: 24 - 2026-11-04: 24 - 2026-11-03: 24 ## Common questions ### What is the Commonpost MCP for Thunderbird server? Commonpost MCP for Thunderbird is listed in the public MCP registry as io.github.commonpost/thunderbird-mcp. Mail, contacts, calendar and filters of Thunderbird for AI assistants, through a local add-on. This page covers its MCPB bundle (https://github.com/commonpost/thunderbird-mcp/releases/download/v0.19.1/commonpost-mcp-v0.19.0.mcpb). ### Is the Commonpost MCP for Thunderbird server safe to use? Commonpost MCP for Thunderbird scores 24 out of 100 on VerifyMCP. Its build provenance is signed and verified. That is a record of what we were able to check automatically, not an endorsement. The category breakdown on this page shows every signal behind the number, including the ones we could not confirm. ### What tools does the Commonpost MCP for Thunderbird server expose? Commonpost MCP for Thunderbird exposes no tools. We connected to it and read its tool list, and it was empty, so it offers an MCP client nothing to call. ### What licence is the Commonpost MCP for Thunderbird server under? Commonpost MCP for Thunderbird declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls. ### What did VerifyMCP test on the Commonpost MCP for Thunderbird server? VerifyMCP ran 6 checks on Commonpost MCP for Thunderbird, covering Source repository, Provenance, License, Maintenance and 2 more. 8 items could not be completed, a gap on our side rather than a finding about Commonpost MCP for Thunderbird: Malware scan, Known CVEs, Install scripts, Dependency health and 4 more. 5 categories score 0 for that reason, because we only credit what we can confirm. Endpoint Security and Transport & Reachability do not apply to an MCPB bundle, so they were not tested. The score does not measure everything, and the scoring documentation lists what it leaves out. ## Links - Repository: https://github.com/commonpost/thunderbird-mcp - Changelog RSS feed: https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp.xml - Changelog JSON feed: https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp/changelog.json - Trust report (JSON): https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp.json - HTML version of this page: https://verifymcp.io/servers/commonpost-thunderbird-mcp/commonpost-mcp