SpacePost

dev.spacepost/mcpv0.2.2Email

Send email and manage domains, contacts and webhooks on SpacePost, the Resend-compatible email API.

The current version, v0.2.2, was published to the official MCP registry on 2026-11-04. It is distributed as @spacepost/mcp on npm and as a hosted remote over streamable-http, filed under Email by this index, and declares 5 environment variables. Removals and unreachable sources are measured across every server this index tracks, contract drift across the servers that answer in consecutive snapshots; the index's current counts put this record in context.

In-path gate · all MCP tools

Using SpacePost in Claude, Cursor, Gemini CLI, Cline, or Zed?

MCP tool contracts can change remotely with no version bump. The mcpindex gate pins each contract and HOLDs the call when it drifts-before your agent acts. Zero credentials. This is not the package install for this server itself (use Install this server for that).

Install the mcpindex gate (one command)

Rewrites your MCP host config so each server launches behind the gate. Inspect first: curl -fsSL https://mcpindex.ai/install.sh | less

uv tool install mcpindex-gate && mcpindex-config-wire

Auditable install path →Watch it hold a drift →

Trust verdict · v1 advisory · method

REVIEWstatus: PARTIALfresh until 2026-11-28 19:06 UTC

screened 2026-10-29tier: scannedgranularity: description-levelsource: registry

Semantic screen found no manipulation pattern in the description. Conformance probe not yet run.

mcpindex.integrity.descriptionpassINFO

evidence“Tool sends email and manages domains, contacts, webhooks.”via static_description

Limits of this verdict

- Semantic screen only - the deterministic conformance probe has not run on this server
- Confidence is reported but not yet calibrated (v1)
- Screen reads the tool description, not the live behavior
- advisory
- registry description only no input schema
- screen model 8b
- The registry listing (version, packages, links) changed after this screen ran - the description we assessed did not

Semantic screen: an LLM judge reads the tool description for hidden instructions (status PARTIAL). A pass means the description is not lying, not that the tool is safe: a high-capability tool with an honest description still warrants caution. The deterministic conformance probe has not been run on this server yet, so the screen here is semantic-only. Posture: advisory. Confidences are reported but not yet calibrated (calibrated=false at v1). Full verdict history is not shown on this page.

Own this server? Test a description on the public screen → It is a separate check from the verdict above, so the two can differ.

That verdict was true at screening time (snapshot 2026-11-04).

Contracts can change after screening, with no version bump. The gate pins SpacePost’s tool contracts on first sight and holds any silent change before your agent acts - the check that keeps being true on Tuesday.

See your first HOLD in 2 minutes →

Cite this record

People vet a server before wiring it in. One line on your project site or docs answers that with an independent record: screening verdict, registry provenance, contract drift history. It stays current as new screens and drift events land.

Markdown

[Independent trust record for SpacePost](https://mcpindex.ai/server/dev-spacepost-mcp) - screening verdict, registry provenance, and contract drift monitoring.

HTML

<a href="https://mcpindex.ai/server/dev-spacepost-mcp">Independent trust record for SpacePost</a> - screening verdict, registry provenance, and contract drift monitoring.

Embed this badge

A live verdict badge for your README or listing. It reflects the current screen, links back here, and updates when the verdict does.

Markdown

[![mcpindex](https://mcpindex.ai/api/v1/badge/dev-spacepost-mcp)](https://mcpindex.ai/server/dev-spacepost-mcp)

HTML

<a href="https://mcpindex.ai/server/dev-spacepost-mcp"><img src="https://mcpindex.ai/api/v1/badge/dev-spacepost-mcp" alt="mcpindex verdict" height="20" /></a>

Environment variables

SPACEPOST_API_KEY

requiredsecret

SpacePost API key (sp_live_...), created in the SpacePost dashboard under API keys. A sending_access key limits the server to sending.

SPACEPOST_READ_ONLY

Set to true to expose only read tools (GET endpoints).

SPACEPOST_TOOLSETS

Comma-separated API areas to expose, e.g. emails,domains.

SPACEPOST_PERMISSION

Set to sending_access to expose only the tools a sending_access key can call.

SPACEPOST_DEFAULT_FROM

Default sender, e.g. Acme <hello@acme.com>, used when a send omits from.

MCP quality score · maturity, not trust · methodology

freshness

completeness

installability

documentation

stability

Alternatives in Email

Getlead

ad.getle/leads

Find B2B leads with verified work emails, find and verify emails, and run cold email outreach.

Blaze

ai.blaze.app/blaze

Create, edit, and schedule social media posts, carousels, videos, blogs, and emails.

dev.tickstem/mcp

Tickstem developer tools — manage cron jobs and verify emails from your AI coding assistant.

Install this server

Remote endpoint

Streamable HTTP / SSE endpoint. Add to any MCP client that supports remote servers.

https://api.spacepost.dev/mcp

Claude Desktop (claude_desktop_config.json)

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "@spacepost/mcp"
      ],
      "env": {
        "SPACEPOST_API_KEY": "<your-spacepost_api_key>",
        "SPACEPOST_READ_ONLY": "<spacepost_read_only>",
        "SPACEPOST_TOOLSETS": "<spacepost_toolsets>",
        "SPACEPOST_PERMISSION": "<spacepost_permission>",
        "SPACEPOST_DEFAULT_FROM": "<spacepost_default_from>"
      }
    }
  }
}

Cursor (.cursor/mcp.json)

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "@spacepost/mcp"
      ],
      "env": {
        "SPACEPOST_API_KEY": "<your-spacepost_api_key>",
        "SPACEPOST_READ_ONLY": "<spacepost_read_only>",
        "SPACEPOST_TOOLSETS": "<spacepost_toolsets>",
        "SPACEPOST_PERMISSION": "<spacepost_permission>",
        "SPACEPOST_DEFAULT_FROM": "<spacepost_default_from>"
      }
    }
  }
}

Cline (cline_mcp_settings.json)

{
  "mcpServers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "@spacepost/mcp"
      ],
      "env": {
        "SPACEPOST_API_KEY": "<your-spacepost_api_key>",
        "SPACEPOST_READ_ONLY": "<spacepost_read_only>",
        "SPACEPOST_TOOLSETS": "<spacepost_toolsets>",
        "SPACEPOST_PERMISSION": "<spacepost_permission>",
        "SPACEPOST_DEFAULT_FROM": "<spacepost_default_from>"
      }
    }
  }
}

Zed (~/.config/zed/settings.json)

Merge into the context_servers block of your Zed settings.

{
  "context_servers": {
    "mcp": {
      "command": "npx",
      "args": [
        "-y",
        "--",
        "@spacepost/mcp"
      ],
      "env": {
        "SPACEPOST_API_KEY": "<your-spacepost_api_key>",
        "SPACEPOST_READ_ONLY": "<spacepost_read_only>",
        "SPACEPOST_TOOLSETS": "<spacepost_toolsets>",
        "SPACEPOST_PERMISSION": "<spacepost_permission>",
        "SPACEPOST_DEFAULT_FROM": "<spacepost_default_from>"
      }
    }
  }
}

Claude Code (claude mcp add)

claude mcp add --scope user mcp -- npx -y -- @spacepost/mcp

Gemini CLI (gemini mcp add)

gemini mcp add -s user mcp npx -y -- @spacepost/mcp

Verdict API

curl -s mcpindex.ai/api/v1/trust/server/dev-spacepost-mcp

Free-tier verdict as JSON: decision + dimensions + severity. Call it from your agent before it invokes a tool it just discovered.

Details

version: v0.2.2
category: Email
verdict expires: 2026-11-28
quality: 95 / 100
operator: 404-studio

Listing

Listed from the official MCP registry. Unclaimed by its maintainer. Maintainer? Verify it → · or email us →

Provenance

Each verdict is bound to a hash of the exact description it judged, so a re-crawl that changes the text produces a new record rather than silently inheriting this one. Verdict history is hash-chained and anchored to Bitcoin via OpenTimestamps (latest confirmed at block 974,481). Verify it yourself.

Links

Repository →

Remote endpoint

https://api.spacepost.dev/mcp