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.
Available components
Last scanned (3 hours ago)
Scores higher than 70% of MCPB servers
Category Communication
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. How we score → Why this is hard to score →
Supply Chain Security0
- 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.Unverified
- 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).Unverified
- Install-script risk not yet assessed.Unverified
- 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).Unverified
Provenance & Transparency100
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Cryptographically verified build provenance (signed, bound to commonpost/thunderbird-mcp). View diagnostics → Pass
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 0 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability0
- 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.Unverified
Stability & Change Management0
- 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.Unverified
Tool Coverage0
- Tool coverage not yet verified: our sandbox run could not list this package's tools (it declared tools, or its tool listing failed outright).Unverified
Tool Safety0
- Tool safety not yet verified: our sandbox run could not list this package's tools (it declared tools, or its tool listing failed outright).Unverified
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
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.
Checks we ran (6)
- Source repository
- Provenance
- License
- Maintenance
- Security disclosure
- MCP protocol
Checks we could not complete (8)
These are gaps on our side, not findings about this package. We only credit what we can confirm, so a category made up entirely of them scores 0.
- Malware scan in Supply Chain Security (scores 0 for this)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 in Supply Chain Security (scores 0 for this)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 scripts in Supply Chain Security (scores 0 for this)Install-script risk not yet assessed.
- Dependency health in Supply Chain Security (scores 0 for this)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).
- Schema quality in Schema Quality & AI Usability (scores 0 for this)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 in Stability & Change Management (scores 0 for this)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 in Tool Coverage (scores 0 for this)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 in Tool Safety (scores 0 for this)Tool safety not yet verified: our sandbox run could not list this package's tools (it declared tools, or its tool listing failed outright).
Does not apply to this package (2)
- Endpoint SecurityScored on hosted endpoints only. A package has no live endpoint of its own for us to probe.
- Transport & ReachabilityScored on hosted endpoints only. A package has no live endpoint of its own for us to probe.
The score does not measure everything. What the score does not measure →
Every change we have recorded for this component, newest first. Security-relevant changes are always shown. ▲ marks a change for the better, ▼ a change for the worse; unmarked changes are neutral.
- 3 Nov 26 24
First indexed and scored.
Diagnostic detail from the automated scan of this channel: what the scanner observed at each step, so you can see exactly where a check passed or failed. It is informational only and never changes the trust score.
Captured 6 Nov 2026 · Analysed mcpb/https://github.com/commonpost/thunderbird-mcp/releases/download/v0.19.1/commonpost-mcp-v0.19.0.mcpb
Provenance Verified
A signed build attestation was found and verified, binding this exact artifact to the source repository it claims to come from.
| Result | Verified |
|---|---|
| Ecosystem | mcpb |
| Reason | Verified |
| Discovered via | GitHub artifact attestations |
| Source repo | commonpost/thunderbird-mcp |
| Certificate issuer | https://token.actions.githubusercontent.com |
| Certificate SAN | https://github.com/commonpost/thunderbird-mcp/.github/workflows/build-and-release.yml@refs/tags/v0.19.1 |
| Rekor log index | 3700033909 |
| Predicate type | SLSA build provenance https://slsa.dev/provenance/v1 |
| Subject digest | sha256:9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33 |
Background: How many MCP packages publish verified provenance →
The tools this component advertises to a client, with an estimated token cost for each. Expand a tool to see its parameters and schema. The per-tool counts are indicative and are not scored directly; the schema's total context footprint is one signal in Schema Quality & AI Usability. A tool's description is untrusted text the model reads on every call, which is what makes this list a security surface and not just an inventory: how tool poisoning works →
The sandbox run completed and this package exposed no tools.
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.
mcpb · commonpost-mcp-v0.19.0.mcpb
Download bundleCheck the download matches the SHA-256 the MCP registry declares before you open it. If it does not match, do not open the file.
SHA-256
9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33
macOS / Linux
echo "9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33 commonpost-mcp-v0.19.0.mcpb" | shasum -a 256 -c
Windows (PowerShell)
(Get-FileHash -Algorithm SHA256 .\commonpost-mcp-v0.19.0.mcpb).Hash -eq "9ab972ab69fc103c310db86e9e4edae5a23aaacaad9d96e82fb11ca828a86b33"
Run it in the folder you saved the bundle to, then open the file with an MCPB-capable host such as Claude Desktop.
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.