Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
git clone --depth 1 https://github.com/openephemeris/openephemeris-MCPWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/plugins/openephemeris/openephemeris-mcp/gemini-extension)<a href="https://agentmods.dev/plugins/openephemeris/openephemeris-mcp/gemini-extension"><img src="https://agentmods.dev/badge/plugins/openephemeris/openephemeris-mcp/gemini-extension/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/plugins/openephemeris/openephemeris-mcp/gemini-extension"><img src="https://agentmods.dev/badge/plugins/openephemeris/openephemeris-mcp/gemini-extension.svg" alt="Reviewed on agentmods" width="80" height="20"></a>Grade A, and why
openephemeris scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 14d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
What it actually says
{
"name": "openephemeris",
"version": "4.21.0",
"description": "Sub-arcsecond ephemeris and astrology on NASA JPL DE440: natal, transits, eclipses, Human Design.",
"mcpServers": {
"openephemeris": {
"httpUrl": "https://mcp.openephemeris.com/mcp",
"headers": {
"X-API-Key": "$OPENEPHEMERIS_API_KEY"
}
}
}
}
What ships with it
4 files beside gemini-extension.json in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 14d ago Changed cec77dc91cfc
- 17d ago Changed 5e371b4cbc40
- 18d ago Changed bbc3b52baf44
- 19d ago Changed 6d095acffd5b
- 20d ago Changed 4ca59964891c
- 24d ago Changed 1689f29c097d
- 1mo ago First seen · 14 lines scan A d21808d826d4
openephemeris is a plugin published in the GitHub repository openephemeris/openephemeris-MCP (5 stars, last pushed 15d ago), licensed MIT. Its token cost is not measured: this kind of file is read by the harness, not the model. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-09-11.
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