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Coldrig — cold-email infra run by your agent: 28 MCP tools, live sending, free sandbox, from $99/mo.
io.github.YS-projectcalc/agent-cold-email is an MCP server entry in ChatHome Skills, sourced from Official MCP Registry and scored 73/100. As a Model Context Protocol server, it exposes tools that MCP-compatible LLM clients such as Claude, Cursor, and Copilot can call directly, extending an agent's reach beyond its built-in capabilities. ChatHome Skills discovered this entry through its daily ingest of official registries and GitHub discovery queries, and re-verifies repository facts, freshness signals, and install metadata on every run. The quality score weighs official-registry presence, a working install command, license clarity, GitHub star trajectory, and repository freshness — the full formula is on the Sources page. The install command above is ready to copy. Review the last-pushed date and repository status before adding io.github.YS-projectcalc/agent-cold-email to a production agent workflow; the snapshot facts below are point-in-time values from the most recent ingest.
mcp add io.github.YS-projectcalc/agent-cold-email https://api.coldrig.dev/mcpReview the upstream source before running this command.
{
"_meta": {
"io.modelcontextprotocol.registry/official": {
"status": "active",
"isLatest": true,
"updatedAt": "2026-09-25T04:05:59.758531Z",
"publishedAt": "2026-09-25T04:05:59.758531Z",
"statusChangedAt": "2026-09-25T04:05:59.758531Z"
}
},
"server": {
"name": "io.github.YS-projectcalc/agent-cold-email",
"$schema": "https://static.modelcontextprotocol.io/schemas/2025-12-11/server.schema.json",
"remotes": [
{
"url": "https://api.coldrig.dev/mcp",
"type": "streamable-http",
"headers": [
{
"name": "Authorization",
"format": "string",
"isSecret": true,
"isRequired": true,
"description": "Bearer token from POST /signup (free, no card) — or run `npx agent-cold-email demo` first"
}
]
}
],
"version": "0.2.5",
"packages": [
{
"version": "0.2.2",
"transport": {
"type": "stdio"
},
"identifier": "agent-cold-email",
"registryType": "npm",
"environmentVariables": [
{
"name": "AGENT_COLD_EMAIL_API_KEY",
"format": "string",
"isSecret": true,
"description": "Bearer token from POST /signup (free, no card) — or run `npx agent-cold-email demo` first. Optional at startup: without it, `initialize`/`tools/list` still work (unauthenticated introspection), but every `tools/call` fails until a key is set."
},
{
"name": "AGENT_COLD_EMAIL_BASE_URL",
"format": "string",
"description": "Override the API base URL (default: https://api.coldrig.dev)"
}
]
}
],
"repository": {
"url": "https://github.com/YS-projectcalc/agent-cold-email",
"source": "github"
},
"websiteUrl": "https://coldrig.dev/",
"description": "Coldrig — cold-email infra run by your agent: 28 MCP tools, live sending, free sandbox, from $99/mo."
}
}