An agent skill for Claude Code, with experimental support for Codex and Antigravity, that retrieves primary sources and verifies claims against official specifications, documentation, papers, and standards.
Prices and medians update for the tier you select. Caution: thin market — treat statistics as indicative.
Compare at
grounded-expert · Pro
No Pro plan
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Pro-provider median
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insufficient comparable pricing
vs Pro providers
No comparison
grounded-expert doesn't sell Pro
ⓘ Comparisons are same provider type (provider) and same buyer tier (Pro). Never across tiers.
Market density
29th pctile
41 competing vendors
Comparable listings · 30d
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Price spectrum · Pro plans · 1 of 2 providers priced · log scale · $69 → $69/mo
MCP servers◻ shaded = middle 50% · line = median (all types)grounded-expert has no comparable Pro price — not plotted
Products in this market
Ranked by how closely each one matches grounded-expert's job. Prices show each provider's Pro state; entry prices are labelled as such. Unpriced products still belong to the market.