Email Inbox API + Sending by Sendmux
Local package path declaredCredentials listedRepository declared by sourceUpdated 2026-10-02
io.github.Sendmux/sendmux-mcp · Registry status: active
At a glance
AI email inbox and sending tools with attachments, search, live events, and webhooks.
Vendor's own description, untranslated and unverified
- Execution location
- Local package path declaredMCP-Register · 2026-08-06
- Required secrets declared
- Credentials listedMCP-Register · 2026-08-06
- Declared version and change
2.2.0· Source-reported change date 2026-10-02MCP-Register · 2026-10-03- Repository as declared
- github.com/Sendmux/sendmux-sdkMCP-Register · 2026-08-06
- Configuration
- can be built from the disclosed start template
Inspect connection paths and prerequisites
Related categories
- MCP servers for email945
- MCP servers with declared required secrets6,113
- Locally executed MCP servers17,143
- MCP servers with a repository URL30,309
- Local MCP servers with a repository URL16,232
- Local MCP servers with declared required secrets3,840
6 of 8 categories. All categories in the segment catalogue
Page last changed:
Sources and collection
- Runs
- Local package path declared
- Credentials
- Credentials listed
- Registry record changed
- 2026-10-02
- Setup
- Template available
- Registry name
io.github.Sendmux/sendmux-mcp- Package coordinate
npm:sendmux-mcp- Declared version
2.2.0- Source-reported listing date
- 2026-10-02
- Source-reported change date
- 2026-10-02
- First seen by tracevero
- 2026-08-06
- Vendor's website
- https://sendmux.ai/docs/guides/mcp
Evidence for this page: The values on this page come from several collections. Each row therefore states its own origin. What the confidence levels mean
Measured values
| Required secrets declared | Credentials listed yes Original data – Required secret variables (raw): SENDMUX_MAILBOX_API_KEY, SENDMUX_MANAGEMENT_API_KEY Original data – Required secret headers (raw): confirmed absent Source: MCP-Register · collected on 2026-08-06 · derived |
|---|---|
| Execution location | Local package path declared local Original data – Transports (raw): stdio, stdio, streamable-http Source: MCP-Register · collected on 2026-08-06 · derived |
| Path argument present | no Original data – Path arguments (raw): confirmed absent Original data – Path environment variables (raw): confirmed absent Source: MCP-Register · collected on 2026-08-06 · derived |
| Repository URL listed | Repository declared by source yes Original data – Repository (raw): https://github.com/Sendmux/sendmux-sdk Source: MCP-Register · collected on 2026-08-06 · derived |
| Field of use, derived from the vendor description | Email Original data – Description (raw): AI email inbox and sending tools with attachments, search, live events, and webhooks. Source: MCP-Register · collected on 2026-08-26 · derived |
| Declared version | 2.2.0 Source: MCP-Register · collected on 2026-10-03 · self-declared |
What is measured is what a manifest declares, not what a piece of software does. This registry fetches no repository URL, no endpoint and no package index; nothing here is verified. Which value comes from which source, and by which rule it was formed, is set out in the Methodology.
Where this server connects to
- Address as stated in the raw record
https://mcp.sendmux.ai/mcp- Host
mcp.sendmux.aiEntries carrying exactly this value: 1
Taken verbatim from the raw record. The registry does not call this address and does not infer a shared operator from a shared host.
Source data25
Evidence for this page: The values on this page come from several collections. Each row therefore states its own origin.
| Description (raw) | AI email inbox and sending tools with attachments, search, live events, and webhooks. Source: MCP-Register · collected on 2026-08-26 · self-declared |
|---|---|
| Environment variables (raw) | SENDMUX_MCP_SURFACES, SENDMUX_MAILBOX_API_KEY, SENDMUX_MANAGEMENT_API_KEY, SENDMUX_SENDING_API_KEY Source: MCP-Register · collected on 2026-08-06 · self-declared |
| Required secret variables (raw) | SENDMUX_MAILBOX_API_KEY, SENDMUX_MANAGEMENT_API_KEY Source: MCP-Register · collected on 2026-08-06 · self-declared |
| Transports (raw) | stdio, stdio, streamable-http Source: MCP-Register · collected on 2026-10-01 · self-declared |
| Path arguments (raw) | confirmed absent Source: MCP-Register · collected on 2026-08-06 · self-declared |
| Repository (raw) | https://github.com/Sendmux/sendmux-sdk Source: MCP-Register · collected on 2026-08-06 · self-declared |
| Package registries (raw) | npm, pypi Source: MCP-Register · collected on 2026-10-01 · self-declared |
| Required secret headers (raw) | confirmed absent Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Path environment variables (raw) | confirmed absent Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Remote URLs (raw) | https://mcp.sendmux.ai/mcp Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Remote hosts (raw) | mcp.sendmux.ai Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Registry status message (raw) | confirmed absent Source: MCP-Register · collected on 2026-08-16 · self-declared |
| First listed in the registry (raw) | 2026-10-02 Source: MCP-Register · collected on 2026-10-03 · self-declared |
| Last changed in the registry (raw) | 2026-10-02 Source: MCP-Register · collected on 2026-10-03 · self-declared |
| Schema version of the raw record (raw) | https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Delivery form (raw) | package and remote Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Repository platform (raw) | github Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Repository subfolder (raw) | packages/python/mcp Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Package identifiers (raw) | sendmux-mcp Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Package versions (raw) | 1.0.0, 2.2.0 Source: MCP-Register · collected on 2026-10-03 · self-declared |
| Runtime hints (raw) | confirmed absent Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Environment variable formats (raw) | string Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Environment variable descriptions (raw) | SENDMUX_MAILBOX_API_KEY=Mailbox API key for Mailbox API and Sending API tools. · SENDMUX_MANAGEMENT_API_KEY=Root API key for Management API tools. · SENDMUX_MCP_SURFACES=Tool surfaces to run locally. · SENDMUX_SENDING_API_KEY=Optional send-capable smx_mbx_ key or owner-approved smx_agent_ token for Sending API tools when it differs from the Mailbox API key. Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Icon formats (raw) | confirmed absent Source: MCP-Register · collected on 2026-08-16 · self-declared |
| Connection paths (source structure) | {"packages":[{"registryType":"npm","identifier":"sendmux-mcp","version":"1.0.0","transport":"stdio","environment":[],"additional_arguments_declared":false},{"registryType":"pypi","identifier":"sendmux-mcp","version":"2.2.0","transport":"stdio","environment":[{"name":"SENDMUX_MCP_SURFACES","description":"Tool surfaces to run locally.","format":"string","required":true,"secret":false},{"name":"SENDMUX_MAILBOX_API_KEY","description":"Mailbox API key for Mailbox API and Sending API tools.","format":"string","required":true,"secret":true},{"name":"SENDMUX_MANAGEMENT_API_KEY","description":"Root API key for Management API tools.","format":"string","required":true,"secret":true},{"name":"SENDMUX_SENDING_API_KEY","description":"Optional send-capable smx_mbx_ key or owner-approved smx_agent_ token for Sending API tools when it differs from the Mailbox API key.","format":"string","required":false,"secret":true}],"additional_arguments_declared":false}],"remotes":[{"url":"https://mcp.sendmux.ai/mcp","transport":"streamable-http","headers":[]}]} Source: MCP-Register · collected on 2026-10-03 · self-declared |
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Changes
| 2026-10-03 | Declared version: 2.1.4 → 2.2.0 |
|---|---|
| 2026-10-03 | Last changed in the registry (raw): 2026-09-30 → 2026-10-02 |
| 2026-10-03 | First listed in the registry (raw): 2026-09-30 → 2026-10-02 |
These are the 3 most recent changes to this entry. Full history
tracevero · https://tracevero.com/mcp/io-github-sendmux-sendmux-mcp