io.github.vitalio-sh/thunderbird-cli
NPM · THUNDERBIRD-CLI-MCP · SCANNED SEP 22
Give AI agents full read/write email access via Mozilla Thunderbird. Zero credentials.
Available components
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 Security98
- No malware found by supply-chain analysis.Pass
- No known CVEs affecting this package version or its production dependencies.Pass
- No install/post-install scripts declared.Pass
- 31 of 95 dependencies flagged as unhealthy. View diagnostics → Partial
Provenance & Transparency48
- Source repository is publicly reachable at the declared URL. View diagnostics → Pass
- Provenance check failed: no build-provenance attestation is published. See how to fix → View diagnostics → Fail
- Clear OSI-approved license (MIT).Pass
- Actively maintained (last published 7 days ago).Pass
- Publishes a security disclosure policy (SECURITY.md).Pass
Schema Quality & AI Usability77
- AI-judged instruction clarity (excellent).Pass
- Context-footprint check failed: tool/resource definitions use about 1306 tokens (~108/item across 12 items; 12 tools + 0 resources), over budget; trim descriptions and params. See how to fix → Fail
- Usage-examples check failed: none of the tools include examples. See how to fix → Fail
Stability & Change Management100
- No destabilizing schema changes in the last 30 days.Pass
Tool Coverage98
- 100% of tools have a non-trivial description (not blank, and not just the tool's name).Pass
- 95% of tool parameters carry a description.Partial
Tool Safety100
- No prompt-injection markers were found in the server instructions, tool names or descriptions we captured.Pass
- We read all 12 captured tool definition(s), and no name or description among them implies an irreversible operation.Pass
- An AI judge read all 12 captured unit(s) of tool text and found none that tries to manipulate the model reading it.Pass
Capabilities100
- Implements a supported MCP spec version (2025-11-25); the latest is 2026-07-28.Pass
How do I install the io.github.vitalio-sh/thunderbird-cli MCP server?
io.github.vitalio-sh/thunderbird-cli runs locally as an npm package, launched with npx -y thunderbird-cli-mcp. Ready-made configuration for Claude, Cursor, VS Code, Codex and 5 more is on this page, copied from each client's own documentation.
npm · thunderbird-cli-mcp
claude mcp add vitalio-sh-thunderbird-cli -- npx -y thunderbird-cli-mcp
{
"mcpServers": {
"vitalio-sh-thunderbird-cli": {
"command": "npx",
"args": [
"-y",
"thunderbird-cli-mcp"
]
}
}
} {
"servers": {
"vitalio-sh-thunderbird-cli": {
"command": "npx",
"args": [
"-y",
"thunderbird-cli-mcp"
]
}
}
} codex mcp add vitalio-sh-thunderbird-cli -- npx -y thunderbird-cli-mcp
{
"$schema": "https://opencode.ai/config.json",
"mcp": {
"vitalio-sh-thunderbird-cli": {
"type": "local",
"command": [
"npx",
"-y",
"thunderbird-cli-mcp"
],
"enabled": true
}
}
} openclaw mcp add vitalio-sh-thunderbird-cli --command npx --arg -y --arg thunderbird-cli-mcp
mcp_servers:
vitalio-sh-thunderbird-cli:
command: "npx"
args: ["-y", "thunderbird-cli-mcp"] {
"McpServers": {
"vitalio-sh-thunderbird-cli": {
"Transport": "stdio",
"Command": "npx",
"Arguments": [
"-y",
"thunderbird-cli-mcp"
]
}
}
} assistant mcp add vitalio-sh-thunderbird-cli -t stdio -c npx -a -y thunderbird-cli-mcp
{
"mcpServers": {
"vitalio-sh-thunderbird-cli": {
"command": "npx",
"args": [
"-y",
"thunderbird-cli-mcp"
]
}
}
} 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.
- 22 Sept 26 +1
- Stability: 0.97 → pass security
- Security disclosure: unverified → pass ▲ functional
- 21 Sept 26 0
- Security disclosure: pass → unverified ▼ functional
- 20 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
- 18 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 83 to 87. That category is still filling its 30-day observation window: 25 days of observed history at the previous scan, 26 at this one. The score rises as the window fills, whether or not the server changes.
- 16 Sept 26 −3
- Stability: pass → 0.80 functional
- 15 Sept 26 +1
- Stability: 0.97 → pass security
- Security disclosure: unverified → pass ▲ functional
- 14 Sept 26 0
- Security disclosure: pass → unverified ▼ functional
- 13 Sept 26 +1
No change was recorded against any check on this day. Stability & Change Management went from 90 to 93. That category is still filling its 30-day observation window: 27 days of observed history at the previous scan, 28 at this one. The score rises as the window fills, whether or not the server changes.
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 22 Sept 2026 · Analysed npm/thunderbird-cli-mcp@1.0.2
Provenance No attestation
The registry publishes no build provenance for this version, so there is nothing to verify.
| Result | No attestation |
|---|---|
| Ecosystem | npm |
Background: How many MCP packages publish verified provenance →
Dependencies 95 packages
| Packages resolved | 95 |
|---|---|
| Stale | 31 |
| Tree resolution | Complete |
Background: SBOMs and build attestations, explained →
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 →
email_archive ~108
Archive, move, or delete messages. Operations: 'archive' (move to archive folder), 'move' (to specific folder), 'delete' (to trash). Permanent delete requires confirm=true.
| Name | Type | Req | Description |
|---|---|---|---|
| confirm | boolean | – | Required for permanent delete |
| destinationFolderId | string | – | Required for 'move' operation |
| messageIds | array | yes | Message IDs |
| operation | string | yes | Operation type |
| permanent | boolean | – | For delete: skip trash (requires confirm) |
No output schema declared.
No examples provided.
email_attachments ~84
List or download attachments from a message. Operation 'list' returns attachment metadata. Operation 'download' returns base64-encoded file data (use partName from list results).
| Name | Type | Req | Description |
|---|---|---|---|
| messageId | number | yes | Message ID |
| operation | string | yes | list metadata or download a specific attachment |
| partName | string | – | Required for download — get from list operation |
No output schema declared.
No examples provided.
email_compose ~187
Compose a new email. Default mode is 'draft' (saved to Drafts folder, not sent). Use mode='send' to send immediately, mode='open' to open in Thunderbird's compose window for human review. ALWAYS prefer draft mode unless the human explicitly asked to send.
| Name | Type | Req | Description |
|---|---|---|---|
| bcc | string | – | BCC recipients |
| body | string | yes | Message body (plain text) |
| cc | string | – | CC recipients |
| from | string | – | Identity ID to send from (use email_identities-equivalent or check email_stats for accounts) |
| html | boolean | – | Treat body as HTML |
| mode | string | – | draft (default, saves silently), open (compose window), send (immediate) |
| priority | string | – | – |
| subject | string | – | Subject line |
| to | string | yes | Recipient(s), comma-separated for multiple |
No output schema declared.
No examples provided.
email_folders ~102
List folders for an account, get folder info with message counts, or trigger sync. Operations: 'list' (folders for account), 'all' (across all accounts), 'info' (one folder), 'sync' (refresh from IMAP).
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Required for 'list' operation |
| folderId | string | – | Required for 'info' and 'sync' operations |
| operation | string | yes | Operation type |
No output schema declared.
No examples provided.
email_forward ~64
Forward a message to a new recipient. Default mode is 'draft' for human review.
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | – | Optional additional text |
| messageId | number | yes | Message ID to forward |
| mode | string | – | – |
| to | string | yes | Recipient address |
No output schema declared.
No examples provided.
email_list ~110
List messages in a specific folder. Use email_folders first to get folder IDs. Supports pagination and sorting.
| Name | Type | Req | Description |
|---|---|---|---|
| flagged | boolean | – | Flagged only |
| folderId | string | yes | Folder ID (e.g. 'account1://INBOX') |
| limit | number | – | Max results |
| offset | number | – | Skip first N (pagination) |
| sort | string | – | Sort field |
| sortOrder | string | – | Sort direction |
| unread | boolean | – | Unread only |
No output schema declared.
No examples provided.
email_mark ~100
Update message flags: read/unread, flagged/unflagged, junk/not-junk. Accepts a single ID or array of IDs for batch operations.
| Name | Type | Req | Description |
|---|---|---|---|
| flagged | boolean | – | Flag (true) or unflag (false) |
| junk | boolean | – | Mark junk (true) or not-junk (false) |
| messageIds | array | yes | Message IDs |
| read | boolean | – | Mark as read (true) or unread (false) |
No output schema declared.
No examples provided.
email_read ~89
Read a specific email message. Modes: 'default' (headers + text body), 'headers' (cheapest), 'full' (with HTML), 'raw' (RFC822). Use maxBody to truncate long messages.
| Name | Type | Req | Description |
|---|---|---|---|
| maxBody | number | – | Truncate body to N characters |
| messageId | number | yes | Thunderbird internal message ID |
| mode | string | – | Read mode |
No output schema declared.
No examples provided.
email_reply ~79
Reply to a message. Default mode is 'draft'. Use mode='send' for immediate send. Set replyAll=true to reply to all recipients.
| Name | Type | Req | Description |
|---|---|---|---|
| body | string | yes | Reply body |
| messageId | number | yes | Message ID to reply to |
| mode | string | – | – |
| replyAll | boolean | – | Reply to all recipients |
No output schema declared.
No examples provided.
email_search ~271
Search for emails across all accounts. Supports filters by sender, recipient, subject, date range, attachments, tags. Excludes junk by default. Use --fields to minimize token cost.
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Limit to specific account |
| flagged | boolean | – | Flagged/starred only |
| folderId | string | – | Limit to specific folder |
| from | string | – | Filter by sender address |
| hasAttachment | boolean | – | Only with attachments |
| includeJunk | boolean | – | Include junk messages (default: false) |
| limit | number | – | Max results |
| query | string | yes | Full-text search query (searches body) |
| since | string | – | Start date (ISO 8601 or relative: '7d', '2w', '3m', '1y', 'today', 'yesterday') |
| sizeMax | number | – | Maximum message size in bytes |
| sizeMin | number | – | Minimum message size in bytes |
| subject | string | – | Filter by subject substring |
| tag | string | – | Filter by tag key (e.g. $label1) |
| to | string | – | Filter by recipient address |
| unread | boolean | – | Unread only |
| until | string | – | End date (ISO or relative) |
No output schema declared.
No examples provided.
email_stats ~67
Get an overview of all email accounts: total accounts, unread counts, message totals. Optionally filter to a single account or include per-folder breakdown.
| Name | Type | Req | Description |
|---|---|---|---|
| accountId | string | – | Optional: limit stats to a specific account ID |
| includeFolders | boolean | – | Include per-folder breakdown |
No output schema declared.
No examples provided.
email_thread ~45
Get the full conversation thread for a message — all related messages sorted chronologically, resolved across accounts via References/In-Reply-To headers.
| Name | Type | Req | Description |
|---|---|---|---|
| messageId | number | yes | Message ID |
No output schema declared.
No examples provided.
What is the io.github.vitalio-sh/thunderbird-cli MCP server?
io.github.vitalio-sh/thunderbird-cli is an MCP server listed in the public MCP registry as io.github.vitalio-sh/thunderbird-cli. Give AI agents full read/write email access via Mozilla Thunderbird. Zero credentials. This page covers its npm package (thunderbird-cli-mcp).
Is the io.github.vitalio-sh/thunderbird-cli MCP server safe to use?
io.github.vitalio-sh/thunderbird-cli scores 85 out of 100 on VerifyMCP. We found no known CVEs affecting it as of 22 September 2026. It declares no install or post-install scripts. 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 io.github.vitalio-sh/thunderbird-cli MCP server expose?
io.github.vitalio-sh/thunderbird-cli exposes 12 tools: email_stats, email_search, email_list, email_read, email_thread, and 7 more. Their descriptions and schemas cost roughly 1,306 tokens of context every time the server is loaded.
Is the io.github.vitalio-sh/thunderbird-cli MCP server still maintained?
io.github.vitalio-sh/thunderbird-cli is still listed as active in the MCP registry. We last reached this channel on 22 September 2026. Those dates come from our own scans of the registry and the channel itself, not from anything the publisher announced.
What licence is the io.github.vitalio-sh/thunderbird-cli MCP server under?
io.github.vitalio-sh/thunderbird-cli declares the MIT licence, which is OSI-approved. That covers the source only, and says nothing about the cost of any service it calls.